#linuxcnc | Logs for 2016-03-10

Back
[00:59:38] <pink_vampire> hi
[00:59:58] <pink_vampire> 1:34am here
[01:00:12] <pink_vampire> and it's morning for me
[01:05:15] <os1r1s> pink_vampire https://www.dropbox.com/s/botfv1fk0kvz8q6/pm25-zaxis.jpg?dl=0
[01:05:58] <pink_vampire> os1r1s: you also have the g0704?
[01:06:13] <os1r1s> pink_vampire This is a pm25-mv which is similar to a g0704
[01:07:27] <pink_vampire> is there any difference?
[01:08:15] <os1r1s> A few differences. It has a solid column mount, belt drive, and I *think* a larger X table
[01:09:38] <pink_vampire> not bed at all
[01:09:55] <pink_vampire> bad*
[01:10:03] <os1r1s> pink_vampire http://www.machinetoolonline.com/PM-MV-BenchMills.html
[01:11:41] <pink_vampire> I wish I know about it
[01:12:26] <os1r1s> pink_vampire Its a little more than the g0704, but I think the belt driven brushless motor is worth it
[01:13:09] <pink_vampire> totally
[02:36:04] <Deejay> moin
[02:49:00] <pink_vampire> moin
[02:49:04] <pink_vampire> Deejay:
[02:50:01] <Deejay> hi pinky :)
[02:51:56] <pink_vampire> hi
[03:26:47] <pink_vampire> I need 12V geared dc motor :(
[03:28:37] <SpeedEvil> pink_vampire: see http://imgur.com/46dNnMY
[03:28:40] <SpeedEvil> err - not that
[03:28:53] <SpeedEvil> http://www.ebay.co.uk/itm/555-Metal-Gear-Electric-Motors-3V-24V-DC-Gear-Motor-High-Torque-Low-Noise-New-/291613922672?hash=item43e58b5570:g:RrIAAOSw7hRWQvgc
[03:29:04] <SpeedEvil> there are quite a lot of these exact model on ebay and elsewhere
[03:29:08] <SpeedEvil> they work well
[03:29:30] <pink_vampire> and torque of 2N/m
[03:29:48] <SpeedEvil> what for?
[03:29:59] <pink_vampire> rotating arm
[03:30:13] <SpeedEvil> what RPM?
[03:30:27] <pink_vampire> 50-150 will be fine
[03:30:42] <pink_vampire> about the mouse it's soooo cuuute
[03:31:38] <SpeedEvil> :)
[03:32:28] <SpeedEvil> Imagine a 1m arm, with a 6.28m circumference. 150RPM/min = 2.5RPS = 15.7m/s.
[03:32:48] <SpeedEvil> 15.7m/s * 2Nm = 31W
[03:33:04] <pink_vampire> noo
[03:33:19] <pink_vampire> it's going to be something small
[03:33:32] <SpeedEvil> yes - that's just to compute watts
[03:33:42] <SpeedEvil> it works the same if it's 10cm arm and 20N
[03:33:44] <pink_vampire> but the arm it's steel
[03:34:20] <SpeedEvil> The above motor would be of the right order of magnitude
[03:35:23] <pink_vampire> according to the calcs and the simulations I need about 1N/m
[03:35:38] <pink_vampire> so.. to be on the safe side.. 2N/m
[03:37:07] <archivist> do you realise how fast 50 rpm is to move an arm
[03:37:23] <archivist> you are not thinking it through
[03:38:19] <pink_vampire> I want it to so about half a turn in 1-3 seconds
[03:40:29] <pink_vampire> so half turn in 3 seconds it's 10RPM
[03:41:34] <pink_vampire> it's a bit on the slow side. but it will be useful as well
[03:42:32] <archivist> now recalculate wattage
[03:44:17] <pink_vampire> it's depend on the efficiency of the motor
[03:45:36] <archivist> assume about 80% for a toy one
[03:46:16] <pink_vampire> but sometimes they give you the torque
[03:47:37] <pink_vampire> http://www.ebay.com/itm/DC-24V-10RPM-37GB-High-Torque-Gear-Box-Electric-Motor-250mA-37MM-20kg-cm-0-25A-/171643076483?hash=item27f6b97f83:g:f0YAAOSw2s1Ut7Nq
[03:49:05] <pink_vampire> http://www.ebay.com/itm/DC-12V-150mA-10RPM-20-9Kg-cm-High-Torque-Permanent-Magnetic-DC-Gear-Motor-/271268847221?hash=item3f28e21e75:g:FOYAAOSwyQtV3~IZ
[03:49:16] <pink_vampire> this one look nice
[03:49:52] <pink_vampire> but I can't find drawing for it.
[03:55:05] <Sync_> pink_vampire: motor power is always given in mechanical output
[03:59:18] <pink_vampire> the motor in the last link look perfect
[04:00:05] <pink_vampire> but without drawing I can't add it to solidworks to see if it's fit
[04:00:36] <SpeedEvil> Sync_: hahahhhhahahha
[04:01:28] <pink_vampire> O_o I'm lost
[04:04:36] <SpeedEvil> 'without a drawing' ?
[04:05:24] <SpeedEvil> The dimensions are very closely estimable from the photos and measurements
[04:05:46] <SpeedEvil> they even give the mounting hole spacings
[04:06:07] <__rob2> https://www.yaskawa.com/pycprd/products/sigma5-servo-products/rotary-servo-motors
[04:06:13] <__rob2> are these internally geared ?
[04:06:16] <__rob2> or is that direct drive
[04:06:49] <SpeedEvil> Actually - that is contradictory - nvm
[04:07:32] <__rob2> I am wondering how on those servos they offer really high bit encoder options, and meet that resolution
[04:07:41] <__rob2> does the motor not have cogging if its not geared
[04:07:50] <__rob2> or more prevelant cogging
[04:07:55] <Sync_> they are direct drive
[04:08:02] <__rob2> yea, so how do they meet 20 bits or whatever
[04:08:05] <SpeedEvil> cogging isn't an inherent thing in motors
[04:08:08] <__rob2> can it actually move that small
[04:08:08] <Sync_> the rotors are optimized for low torque cogging
[04:08:12] <Sync_> yes
[04:08:21] <SpeedEvil> cogging can be designed out almost
[04:08:35] <Sync_> where is the problem? they are only 17 bit in the smallest ones
[04:08:45] <SpeedEvil> the very simplest way is to take a motor with cogging, and make the windings on parallelograms, not 'squares'
[04:08:48] <__rob2> well even 17 bit is quite a small move
[04:08:56] <Sync_> so?
[04:09:08] <SpeedEvil> that's not how cogging works
[04:09:14] <SpeedEvil> they are not stepper motors
[04:09:55] <Sync_> well you will still get cogging torque
[04:10:00] <Sync_> even in a servo motor
[04:10:12] <__rob2> there must be a point at which adjustments in the current to the motor phases don't move it
[04:10:18] <SpeedEvil> yes, which is irrelevant if it's servoed out
[04:10:19] <__rob2> which is what I am wondering on a motor like that
[04:10:36] <Sync_> your controller will adjust it in a way that it moves
[04:10:40] <__rob2> how they make that discreet movment tiny, without oscillating around some set point
[04:10:49] <Sync_> control theory
[04:10:50] <SpeedEvil> PID or friends
[04:11:07] <Sync_> mostly PI with feedforward
[04:11:16] <__rob2> yea, I understand there is a pid loop, but they must accept some discrepancy at some point
[04:11:30] <__rob2> there must be a point where you cannot do the tiny move without overshoot
[04:11:38] <__rob2> and you can never quite hit it
[04:11:44] <Sync_> you can always hit it
[04:11:49] <Sync_> if you can't your parameters are off
[04:12:13] <Sync_> overshoot is usually a function of how fast you want to be able to react
[04:12:36] <archivist> __rob2, there is a minimum ferror in linuxcnc where it knows it is near enough
[04:14:34] <__rob2> right, ok
[04:14:53] <__rob2> so presumably the only reason the geared versions exist is to increase torque
[04:14:56] <__rob2> for a given motor
[04:17:00] <__rob2> http://www.ebay.co.uk/itm/like/321911676206?limghlpsr=true&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=122&chn=ps&googleloc=9045909&poi=&campaignid=207297426&device=c&adgroupid=13585920426&rlsatarget=aud-133395220626%3Apla-142405551906&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0-L&ff12=67&ff13=80&ff14=122&ff19=0&ul_noapp=true
[04:17:02] <__rob2> and thats used!
[04:18:39] <Sync_> those are neat servos, I got one of them
[04:22:03] <__rob2> look very nice
[04:22:05] <__rob2> not cheap tho
[04:22:12] <__rob2> how much is that gonna be new
[04:22:13] <__rob2> ?
[04:22:27] <__rob2> few thousand $$ ?
[04:24:10] <Sync_> I think they are trying to sell it for more than new
[04:25:54] <__rob2> pretty sweet little motor
[04:25:58] <__rob2> onlt 3 cm long
[04:26:19] <__rob2> wonder how they get the 17bit encoder that small
[04:26:33] <__rob2> the avago one i have is way bigger
[04:27:32] <Sync_> 17 bit is not a lot in that size
[04:28:02] <__rob2> maybe its not optical
[04:30:06] <Sync_> it is
[04:31:22] <__rob2> ahh, mabye its just cheaper to do it bigger
[04:31:37] <__rob2> the avago one is £70 all in for 17 bits
[04:32:16] <__rob2> and seems within 1 lsb error from testing
[04:32:24] <Sync_> well, it obviously is easier as your spacing goes up
[04:32:45] <__rob2> yea, no doubt
[04:32:48] <Sync_> but they are just interpolating
[04:33:15] <__rob2> who, avago ?
[04:34:42] <__rob2> or the yakasawa motor
[04:36:53] <__rob2> avago one is interpolating the first 4 bits, seems pretty good tho
[04:37:45] <__rob2> assumed they all did something like that
[04:38:24] <Sync_> it just depends on how well your disc is made
[05:33:09] <pink_vampire> http://www.ebay.co.uk/itm/cnc-Router-Engraver-3D-cnc-Engraving-Drilling-Milling-Machine-cnc-WEGSTR-/281955145018
[05:33:30] <pink_vampire> what do you think about that ^
[05:34:38] <XXCoder> interesting. dunno
[05:36:02] <malcom2073> You know if'ts good when the only actual images of it are renders :P
[05:37:22] <XXCoder> yeah that does not give me condifence.
[05:38:16] <pink_vampire> https://www.youtube.com/watch?v=7z2RsBaIjSs
[05:38:24] <pink_vampire> here is a video of it.
[05:38:50] <pink_vampire> I don't think that with my G0704 I can get that finish
[05:39:23] <pink_vampire> malcom2073: ^
[05:40:03] <malcom2073> Sure you can, if you get the right spindle
[05:40:33] <malcom2073> Though that's an engraver
[05:40:34] <XXCoder> ah was wondering design was mirrored
[05:40:35] <malcom2073> not a mill/router
[05:40:49] <XXCoder> *why
[05:41:12] <pink_vampire> do you have an idea for spindle?
[07:04:45] <pink_vampire> archivist: ?
[07:04:51] <pink_vampire> ping..
[07:06:09] <archivist> ?
[07:07:05] <pink_vampire> how I connect the shaft of the gears to a plate, to hold it in place?
[07:07:55] <pink_vampire> press fit?
[07:08:22] <pink_vampire> or with set screw from the side?
[07:09:11] <archivist> or a taper pin
[07:09:44] <archivist> set screws cannot handle high torque
[07:10:35] <pink_vampire> taper pin?
[07:10:43] <pink_vampire> how I make it?
[07:10:59] <archivist> I buy them
[07:11:10] <archivist> or keyway
[07:11:17] <archivist> or spline
[07:11:26] <archivist> or solder
[07:12:10] <pink_vampire> for 1/8" shaft what is the recommended plate?
[07:12:42] <pink_vampire> I have 1/8" aluminum sheet, and also 8.5mm plate.
[07:14:25] <pink_vampire> archivist: ^
[07:19:25] <archivist> same shaft having all that torque?
[07:22:50] <pink_vampire> yes
[07:26:47] <archivist> http://www.roymech.co.uk/Useful_Tables/Drive/Shaft_design.html
[07:31:16] <pink_vampire> I'm not sure
[07:45:26] <_methods> https://www.kickstarter.com/projects/packageguard/the-package-guard
[07:45:47] <_methods> kickstarter is my little comedy store
[07:50:11] <_methods> https://www.kickstarter.com/projects/885187923/virtual-reality-360-real-footage-hiking-game?ref=category
[07:50:14] <_methods> hahahahah
[07:53:17] <CaptHindsight> darn, the one I had exploded if the package was improperly removed and sent shards of metal in every direction
[07:54:10] <malcom2073> Lol nice, so basically it's a kickstarter to fund them going hiking
[07:54:11] <malcom2073> that's awesome
[07:54:51] <CaptHindsight> VR 360 going to get milk, feel the excitement
[07:54:59] <_methods> https://www.kickstarter.com/projects/btisuits/the-badjo-suit?ref=category
[07:55:08] <malcom2073> I like how, basically, they have zero equipment or anything
[07:55:16] <malcom2073> Needs: Cameras, airplane tickets, hiking gear" lol
[07:55:27] <_methods> yeah fund my hiking plz
[07:55:40] <_methods> i'll send you a 360 post card hahaha
[07:57:55] <_methods> for only $2500 you can have your very own badjo suit hahahahahah
[07:59:33] <_methods> the suit that was designed by tony stark's 3rd cousin with severe head trauma
[08:04:40] <pink_vampire> is there any different between 10 tooth gear and 20 tooth gear to 50 tooth gear and 100 tooth gear, the ratio is the same 1:2 also same diameter and material metal.
[08:05:05] <archivist> tooth strength
[08:05:16] <archivist> accuracy
[08:05:24] <CaptHindsight> _methods: http://www.nydailynews.com/news/national/stylish-tinfoil-hats-kickstarter-campaign-article-1.2477956
[08:05:56] <CaptHindsight> "The apparel was inspired by a family member who complained that he could not fall asleep and blamed it on wireless signals,"
[08:05:58] <pink_vampire> archivist: what about efficiency?
[08:07:17] <archivist> dont worry bout efficiency
[08:08:06] <_methods> hahahah
[08:08:16] <_methods> electromagnetic fog
[08:08:20] <gregcnc> Electromagnetic_hypersensitivity
[08:08:45] <_methods> i thought the USA had the lead in tinfoil hat tech
[08:08:59] <_methods> had no idea the UK was involved too lol
[08:10:40] <Sync_> malcom2073: yeah they are not even really hiking
[08:15:12] <gonzo_> stupidity_hypersensitivity
[08:16:29] <_methods> unfortunately not many kickstarter people suffer from that affliction
[08:16:53] <_methods> they all seem to suffer from stupidity hyposensitivity
[08:17:30] <gregcnc> http://www.popsci.com/science/article/2010-02/disconnected
[08:17:50] <_methods> better call saul
[08:18:31] <gregcnc> It's fun talking with these people who think those stickers you put on your phone reduces radiation
[08:18:45] <gregcnc> the best question is why does you phone still work
[08:19:42] <_methods> https://www.kickstarter.com/projects/biosurn/bios-incube-the-worlds-first-incubator-for-the-aft?ref=category
[08:19:45] <_methods> nice
[08:19:51] <_methods> there's one to turn grandma into a fern
[08:20:39] <gonzo_> I assume they mean "bio's" rather than BIOS
[08:21:37] <gonzo_> a boot-up eprom for the afterlife?
[08:21:57] <_methods> that would be cooler than an old person recycler
[08:24:17] <pink_vampire> ok, back to square one :( parts with small details = small endmills = high rpm = I need high speed spindle
[08:25:28] <gregcnc> you don't need a fast spindle unless you're in a hurry
[08:26:05] <pink_vampire> I have to rotate the end mills in high speed
[08:26:21] <_methods> you can't argue with that
[08:26:57] <pink_vampire> to prevent rubbing, over heating that eventually brake them.
[08:27:10] <_methods> yeah don't overheat them with rubbing
[08:27:13] <_methods> no one likes that
[08:27:43] <pink_vampire> now I have 1000 rpm maX
[08:28:21] <pink_vampire> 1/16" end mill with 1000rpm on aluminum = feed?
[08:28:28] <gregcnc> .
[08:28:30] <malcom2073> There's a calculator for that
[08:28:50] <gregcnc> ~.0005" per tooth
[08:28:54] <pink_vampire> I know
[08:29:32] <malcom2073> 0.4inch per minute
[08:29:34] <pink_vampire> http://cdn0.grizzly.com/manuals/g0704_m.pdf
[08:29:37] <malcom2073> wait, no
[08:29:43] <pink_vampire> page 28
[08:29:53] <_methods> yeah go read pg 28
[08:29:57] <_methods> then figure it out
[08:29:58] <malcom2073> 0.71 heh
[08:30:06] <gregcnc> lol
[08:30:08] <pink_vampire> ( Cutting Speed x 4) /Tool Diameter = RPM
[08:30:27] <pink_vampire> Aluminum & Alloys 300
[08:31:12] <pink_vampire> so (300*4) / 0.0625
[08:31:34] <pink_vampire> 19200 rpm
[08:32:07] <pink_vampire> 20 times faster then what I have :(\
[08:32:11] <gregcnc> www.ebay.com/itm/291204240950? can you save $2500 worth of time? if so it's making money not costing anything
[08:32:55] <malcom2073> Wow, a 60,000rpm 24,000rpm spindle
[08:33:40] <pink_vampire> sounds fishy..
[08:33:43] <pink_vampire> and used..
[08:33:48] <pink_vampire> and 2.5K..
[08:34:45] <gregcnc> what are they new like $15k?
[08:35:11] <pink_vampire> http://www.ebay.com/itm/CNC-300W-Spindle-ER11-mount-Mach3-PWM-Power-source-10-knives/161873837293?_trksid=p2141725.c100338.m3726&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20150313114020%26meid%3D8eed40c9cf564d23aa662a113cdca28d%26pid%3D100338%26rk%3D2%26rkt%3D15%26sd%3D321375580088
[08:35:20] <_methods> now that looks legit
[08:35:22] <_methods> lol
[08:35:32] <pink_vampire> I want it for engraving, and pcb..
[08:35:37] <_methods> don't buy that fishy one
[08:35:41] <_methods> it must be terrible
[08:36:11] <pink_vampire> https://www.youtube.com/watch?v=PfqTp4rEQ3A
[08:36:36] <gregcnc> there is some logic there because you could have 20 spindles turning making money
[08:36:36] <pink_vampire> this is 600$ cnc machine!
[08:37:35] <pink_vampire> I will be happy up to the sky if I will be able to cut pcb like that and engrave like that.
[08:38:02] <pink_vampire> https://www.youtube.com/watch?v=eJnhJbpw1_s
[08:39:50] <pink_vampire> someone recognize the spindle?
[08:40:14] <Sync_> the kavo is pretty legit
[08:40:28] <gregcnc> you can't see the spindle
[08:40:50] <_methods> yeah that kavo is for sure
[08:40:52] <gregcnc> Kavo, Precise, Westwind, etc
[08:41:00] <_methods> i was mocking the chinese spindle
[08:42:10] <pink_vampire> I mean on the cnc
[08:42:29] <Sync_> http://wegstr.com/image/cache/catalog/ZBO%C5%BD%C3%8D%20WEGSTR/Nahradni%20dily/vreteno/1ok-1920x1080.jpg
[08:42:37] <Sync_> it's only 6000 rpm
[08:42:56] <gregcnc> yeah those videos are sped up
[08:43:40] <pink_vampire> http://www.ebay.com/itm/cnc-Router-Engraver-3D-Engraving-Drilling-Milling-Machine-cnc-WEGSTR-/281955144126?hash=item41a5d611be:g:0FYAAOSwzhVWsueX
[08:43:42] <Sync_> there are 60k china spindles
[08:44:38] <pink_vampire> http://wegstr.com/index.php?route=product/product&path=62&product_id=58
[08:45:00] <pink_vampire> 51.416 Euro
[08:45:05] <pink_vampire> not bad
[08:45:27] <pink_vampire> power consumption 10W
[08:45:51] <Sync_> it is a RC bldc with some stuff added
[08:45:56] <Sync_> not what you want
[08:46:12] <pink_vampire> but this 10W make amazing results!
[08:46:54] <pink_vampire> https://www.youtube.com/watch?v=MhfhTRjB1Pk
[08:47:08] <pink_vampire> aluminum
[08:47:14] <pink_vampire> same spindle.
[08:47:23] <pink_vampire> amazing
[08:47:24] <DRGray> when anodising how long do you etc for?
[08:47:29] <DRGray> also any really good de greases?
[08:47:32] <gregcnc> www.ebay.com/itm/331778255018? but these are fairly loud
[08:48:16] <pink_vampire> I need something quite
[08:49:04] <gregcnc> what was that canola?
[08:49:26] <malcom2073> Lol, underoil cutting
[08:49:52] <gregcnc> that would have run for days
[08:49:58] <pink_vampire> malcom2073: whats wrong with that?
[08:50:13] <Sync_> that is due to the fan gregcnc
[08:50:20] <Sync_> they should be silent
[08:50:26] <gregcnc> I know I
[08:50:28] <gregcnc> ve had two
[08:50:33] <pink_vampire> 3:29
[08:50:47] <pink_vampire> jump to ^
[08:51:06] <malcom2073> Jump to 3:21
[08:51:09] <malcom2073> shows the qualtiy before cleanup
[08:51:14] <pink_vampire> I never got even close to that
[08:51:39] <pink_vampire> even in 21
[08:51:46] <pink_vampire> not bad at all!
[08:52:17] <malcom2073> A smaller/faster spindle won't make your machine produce higher quality work
[08:53:42] <pink_vampire> one sec
[08:54:06] <pink_vampire> let me take a pic of aluminum work that I did
[09:00:15] <_methods> http://arstechnica.com/tech-policy/2016/03/patent-battle-over-larpers-foam-arrows-heats-up/
[09:00:20] <_methods> lol
[09:00:37] <_methods> who knew the foam arrow market was so lucrative
[09:01:05] <_methods> they need to take this fight to the battlefield
[09:02:50] <pink_vampire> http://i.imgur.com/8OJnfrM.png
[09:03:35] <pink_vampire> to you see the finish of the cut.
[09:03:56] <_methods> you did all that with your fingernails
[09:04:01] <pink_vampire> soo poor and rough
[09:04:07] <pink_vampire> yes
[09:04:34] <pink_vampire> I even took it apart right now to take the picture.
[09:04:57] <gregcnc> there are many reasons finish sucks
[09:06:49] <pink_vampire> but here the problem is the material is to soft and the rpm speed is too low
[09:06:54] <malcom2073> Well that makes sense, yeah it wil llikey allow you to do small slots slightly nicer heh
[09:07:43] <archivist> learn how to file and use a burnisher
[09:07:57] <gregcnc> http://www.wolfgangengineering.com/ww-650-spindle.html
[09:08:02] <MrSunshine> hmm, dry lubing a steel wire .. anyone know ?
[09:08:17] <MrSunshine> dont want anything dust can stick to and the wire binds when i get it tight enough =)
[09:08:26] <archivist> ptfe or graphite
[09:08:29] <pink_vampire> archivist: I try to avoid filing and work with my hands.
[09:09:07] <malcom2073> Gonna be hard pressed to make good quality parts without working with your hands :P
[09:09:21] <MrSunshine> archivist: hmm ok =) im guessing its due to the strands binding together ... even tho its over pulleys with berings when i get it real tight the rope is stuck in place =)
[09:09:28] <malcom2073> Most things I make spend about half the time on the CNC, half the time in a vice being worked on
[09:09:46] <pink_vampire> gregcnc: what type of collets it use?
[09:10:36] <pink_vampire> malcom2073: I *try* to avoid it..
[09:10:36] <archivist> MrSunshine, wrong v in the pulley?
[09:10:54] <MrSunshine> archivist: its a 6mm half round
[09:10:58] <MrSunshine> for 5mm rope
[09:10:58] <archivist> hand work in engineering is normal
[09:11:17] <gregcnc> not sure about the collet, but you can buy all sorts of tools with 1/8 shank
[09:12:37] <archivist> hand saw to cut out then file http://www.collection.archivist.info/archive/DJCPD/PD/2009/2009_08_13_gear_cutting/P1010249.JPG
[09:12:52] <archivist> then a burnish
[09:14:34] <gregcnc> it says WW collets
[09:15:08] <pink_vampire> what is ww?
[09:15:35] <gregcnc> a type of collet
[09:15:53] <pink_vampire> it's the 8mm watch maker collets?
[09:16:18] <gregcnc> i'm not familiar but that sounds right
[09:16:34] <__rob2> archivist, you made that ?
[09:18:45] <archivist> __rob2, yes
[09:20:58] <archivist> pink_vampire, that gear I just showed, the collet is soldered on the shaft then turned in situ then the wheel is mounted, riveted then turned to hide as much riveting as possible
[09:21:52] <pink_vampire> it's look grate!
[09:22:10] <archivist> one puts a fire on a grate
[09:26:15] <pink_vampire> I can't find the ww collets
[09:26:44] <pink_vampire> and it not that one
[09:26:45] <pink_vampire> http://www.ebay.com/itm/Used-Double-Taper-Collet-Drill-Size-17-64-0-2656-DT-Style-WW-55060-/191793261511?hash=item2ca7c4ebc7:g:S58AAOSwnLdWqOss
[09:27:18] <gregcnc> http://www.sherline.com/1160pg.htm
[09:27:38] <gregcnc> is that not the same?
[09:27:54] <gregcnc> email the guy or google the spindle he's been selling htem for years
[09:29:45] <pink_vampire> * Typical T.I.R. .0009" * End Play <.0003"
[09:29:57] <pink_vampire> what dose it mean?
[09:30:20] <gregcnc> it has some wobble
[09:31:15] <pink_vampire> so not to buy it?
[09:31:21] <pink_vampire> it's junk?
[09:32:01] <gregcnc> it all depends on your needs, what is TIR of your current spindle or of those chinese ones?
[09:34:18] <pink_vampire> you mean the spindle of the G0704?
[09:35:15] <pink_vampire> the needle on the dial barely move
[09:37:38] <gregcnc> if barely is good enough then you need to find another spindle spec'd at barely or better for small tools at high speed
[09:39:42] <pink_vampire> I see that the air high speed spindle it's about 0.0002"
[09:40:05] <pink_vampire> and they go up to 80K rpm..
[09:56:35] <Sync_> I think you'll be happy with one of those chinese 60k spindles, they do the job
[10:02:50] <pink_vampire> Sync_: what spindle do you mean?
[10:02:52] <pink_vampire> link?
[10:05:56] <pink_vampire> this one?
[10:05:58] <pink_vampire> Sync_: ^
[10:06:00] <pink_vampire> http://www.ebay.com/itm/DENTAL-BRUSHLESS-MICROMOTOR-HANDPIECE-E-Type-Foot-Control-60-000-RPM-/281890980128?hash=item41a2030120:g:~1kAAOSwSHZWd7Rq
[10:06:06] <pink_vampire> ^
[10:06:51] <archivist> not a dental one
[10:08:37] <pink_vampire> so so which one?
[10:10:07] <Loetmichel> hrrmph. The car mechanic has called. I have to pay aropund 3500 eur to fix my Opel Omega. The crankcase-vent was blocked. Causing the engine to press every singe gasket out. Even the crankshaft gaskets. They will have to pull the engine out, dismantle it completely, replace all the gaskets, remount it. in sum a complete engine rework :-(
[10:10:55] <cradek> what's a crankshaft gasket?
[10:11:09] <archivist> crank seal
[10:11:27] <Sync_> http://www.ebay.com/itm/201200221593 but good luck finding a vfd for it http://www.ebay.com/itm/111702680484 that's probably better
[10:11:28] <cradek> oh
[10:11:34] <archivist> seems excessive
[10:11:42] <cradek> wouldn't it quit getting worse as soon as the first thing blew out?
[10:12:13] <archivist> I have seen those engines with blocked breathers
[10:12:47] <_methods> does opel even exist anymore?
[10:12:53] <archivist> cheaper to get an engine from a car that has been written off
[10:13:06] <Sync_> _methods: it is a bmw engine
[10:13:08] <Sync_> and a gm trans
[10:13:10] <pink_vampire> natural-cooled
[10:13:12] <pink_vampire> ?
[10:13:53] <Sync_> cooled by natural convection
[10:14:21] <pink_vampire> I know some of them need water,
[10:14:50] <_methods> i thought opel went under
[10:15:32] <MrSunshine> hmm, how would nylone flat straps work i wonder insted of steel wire rope
[10:15:53] <archivist> nylon!!! elastic
[10:15:57] <Loetmichel> archivist: marginally cheaper
[10:16:15] <Loetmichel> about 2k of a used engine in unknown condition
[10:16:25] <Loetmichel> plus the work of the mechanic
[10:16:39] <MrSunshine> archivist: yeah might be .. but these wire rope thingies doesnt want to work .. have drenched the cable in ptfe spray now and while it does not bind its very hard to pull
[10:17:03] <archivist> MrSunshine, just too tight?
[10:17:08] <Loetmichel> so i will go the repair way, my engine runs like a clockwork, so i am relatively sure it will not die on me the next time i drive the car
[10:17:14] <MrSunshine> archivist: if its not that tight it flexes to much
[10:18:12] <archivist> Loetmichel, my ex boss's engine was terminal
[10:18:20] <pink_vampire> http://www.ebay.com/itm/300W-75V-4-5A-60000rpm-Water-cooled-Spindle-Motor-Inverter-Bracket-Pump-Pipe-/262319047147?hash=item3d136f01eb:g:-KgAAOSwMmBVkPtg
[10:18:48] <pink_vampire> it's noisy?
[10:19:04] <Sync_> the naturally cooled one is enough
[10:19:15] <Sync_> well, the cut will be louder
[10:19:39] <Loetmichel> archivist: the engine still purrs like a big cat. but it throws oil like no good. 8 lites in the last 3 weeks
[10:19:42] <Loetmichel> liters
[10:20:08] <Loetmichel> and thats getting slighty expensive (not to mentoin the enviromental impact)
[10:21:13] <Sync_> 60l drum is 190€
[10:21:14] <Sync_> ;)
[10:22:06] <Loetmichel> Sync_: plus the tickets for spoilong the street
[10:22:11] <Loetmichel> spoiling
[10:22:17] <Loetmichel> :-)
[10:22:42] <Sync_> well yeah
[10:22:49] <Sync_> I actually order my oil by the drum now
[10:29:41] <tiwake> heh
[10:35:08] <Sync_> well it is cheaper than ordering gallon jugs
[10:35:21] <Sync_> and in the summer I change the oil after each weekend
[10:36:33] <pink_vampire> which spindle will be more quiet?
[10:36:40] <pink_vampire> http://www.ebay.com/itm/300W-75V-4-5A-60000rpm-Water-cooled-Spindle-Motor-Inverter-Bracket-Pump-Pipe-/262319047147?hash=item3d136f01eb:g:-KgAAOSwMmBVkPtg
[10:36:41] <pink_vampire> or
[10:37:00] <pink_vampire> http://www.ebay.com/itm/1-8-CNC-Router-Spindle-WW-650-25-000rpm-Shapeoko-Taig-Sherline-Wolfgang-/311539274300?hash=item488930123c:g:BfgAAOSwp5JWaRqg
[10:37:55] <Sync_> the non belt driven one, the bldcs make a bit of noise, but you really don't need the water cooled one
[10:38:01] <Sync_> it is just more hassle than what they are worth
[10:39:51] <pink_vampire> what is "bldcs"?
[10:40:30] <_methods> do you not have google or something
[10:40:48] <_methods> were you banned from using google?
[10:43:49] <pink_vampire> no..
[10:44:34] <pink_vampire> I did google on it.
[10:45:03] <pink_vampire> and I'm still don't know what is "bldcs"
[10:45:12] <_methods> http://lmgtfy.com/?q=bldc
[10:45:20] <pink_vampire> something with motors?
[10:47:28] <pink_vampire> floppy motors?
[10:49:00] <Sync_> some floppy motors are bldcs, yes
[10:49:42] <pink_vampire> DC Brushless Motor?
[10:50:06] <Sync_> yes
[10:52:17] <pink_vampire> I'm trying to calculate the recommended rpm for pcb end mills
[10:53:51] <Loetmichel> pink_vampire: easy: full throttle
[10:53:59] <Loetmichel> :-)
[10:54:05] <pink_vampire> what is the cutting speed for pcb?
[10:54:14] <Loetmichel> "as fast as iot gets"
[10:54:24] <_methods> ludicrous speed
[10:54:35] <pink_vampire> the sfm
[10:54:54] <Sync_> 1000
[10:55:08] <pink_vampire> 1000 WOW
[10:55:18] <Loetmichel> i had 2mm dioamond coated cross cut Tungsten carbide end mills that stated 80krpm in the datasheet for milling a slot 6mm deep with 4200mm/min feedrate.
[10:55:27] <Loetmichel> in FR4
[10:55:53] <Sync_> well, what do you expect, it is plastic after all
[10:56:05] <pink_vampire> 338667 RPM
[10:56:08] <pink_vampire> WTF!
[10:56:35] <pink_vampire> I calculate for 0.3 mm end mill
[10:56:45] <Loetmichel> yeah, normal
[10:56:55] <pink_vampire> so just dental stuff can go there..
[10:57:01] <Sync_> nah
[10:57:01] <Loetmichel> as i said: "as fast as you spindle gets... will sitll be some decades top slow ;)
[10:57:22] <Sync_> usually people use 60 or 100k spindles
[10:57:31] <Sync_> and then just stick to the chip thickness you get
[10:57:45] <Sync_> but pcbs are usually etched so it does not matter much
[10:57:58] <pink_vampire> ok...
[10:58:07] <Loetmichel> Sync_: i just wait for my CNC to finsih some PCBs...
[10:58:42] <pink_vampire> what is the minimum rpm that will give good finish on the pcb?
[10:58:48] <Sync_> 1
[10:59:34] <_methods> 0
[10:59:35] <_methods> just drag
[10:59:52] <Sync_> your finish problems are not due to your spindle having not enough speed
[11:00:05] <pink_vampire> with 1000 rpm I've got horrible pcb
[11:00:19] <Sync_> you just have to go slow
[11:00:27] <Sync_> to keep the chip thickness constant
[11:00:54] <archivist> and sharp tooling
[11:01:29] <pink_vampire> http://i.imgur.com/Fay6TCw.jpg
[11:01:33] <pink_vampire> new bit
[11:01:35] <Loetmichel> sharp Tungsten carbide tooling
[11:01:41] <Loetmichel> fr4 contains glass
[11:01:56] <pink_vampire> it was hss..
[11:01:56] <Loetmichel> ... and is abrasive as hell...
[11:01:59] <Sync_> that is not a problem of your spindle speed
[11:02:00] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=16167
[11:03:00] <pink_vampire> Loetmichel: this is your machine?
[11:03:04] <Loetmichel> yes
[11:03:08] <Loetmichel> at the company
[11:03:20] <pink_vampire> what spindle it use?
[11:03:41] <Loetmichel> standard 800W watercooled chinese spindle
[11:03:55] <Loetmichel> its a CNC 604 from china
[11:03:59] <Loetmichel> 6040
[11:04:09] <pink_vampire> what is the max RPM?
[11:04:12] <Loetmichel> 24k
[11:04:34] <Loetmichel> and it does PCB work really fine
[11:05:13] <Loetmichel> https://www.youtube.com/watch?v=jMXxjT4nNxg
[11:05:36] <pink_vampire> it is noisy?
[11:05:46] <Loetmichel> result: http://www.cyrom.org/palbum/main.php?g2_itemId=14507&g2_imageViewsIndex=1
[11:05:57] <Loetmichel> not that much
[11:06:37] <Loetmichel> because no fans its really quiet
[11:07:08] <pink_vampire> do you have a db meter?
[11:07:18] <pink_vampire> even on your phone..
[11:07:39] <Loetmichel> cant
[11:07:46] <pink_vampire> Sound meter.
[11:08:08] <Loetmichel> the "hoover" that powers the vacuum bed is way louder than gthe mill
[11:08:10] <Sync_> your cut will be louder than the spindle
[11:08:26] <Loetmichel> yeah, that as well
[11:09:05] <pink_vampire> now the machine it's about 45db without cutting and about 55-60 when cutting.
[11:09:19] <Loetmichel> and i cant switch off the vacuumbed because the pcb will go flying then ;)
[11:10:27] <pink_vampire> it's louder than the vacuum cleaner?
[11:11:22] <_methods> < Loetmichel> the "hoover" that powers the vacuum bed is way louder than gthe mill
[11:11:35] <pink_vampire> my vacuum cleaner it's about 85db and this is very loud I can;t leave something like that work for long time.
[11:11:51] <Jymmm> That's what earplugs are for
[11:11:56] <Loetmichel> it does a solid 81 db with the vacuum running. wait a few then the machine is done and i check without
[11:12:30] <pink_vampire> thank you soo much Loetmichel
[11:12:34] <pink_vampire> I'm here :)
[11:12:40] <_methods> https://www.youtube.com/watch?v=iFurvAEPmZg
[11:13:00] <_methods> hard drive platter gun lol
[11:13:18] <Jymmm> A feather falls to the ground... OMG IT'S TOO LOUD, IT WOKE THE BABY!!! MAKE IT STOP!!! *eeeesh*
[11:13:46] <Loetmichel> ok, 68 db with vacuum off and spindle running, 73db with cutting pcb
[11:14:19] <pink_vampire> that not bad at all!!
[11:14:36] <gregcnc> cool things happen if you restrain the part. https://www.youtube.com/watch?v=EDj8mDZxfnw
[11:15:49] <_methods> hehe interesting anti-aircraft possibilities
[11:16:00] <_methods> you can shoot pots and pans
[11:16:43] <gregcnc> maybe with this https://www.youtube.com/watch?v=vAs9EHtKfVc
[11:16:53] <pink_vampire> Loetmichel: how did you manage the water ?
[11:17:06] <_methods> it's this new thing called a bucket
[11:17:11] <_methods> it holds this water stuff
[11:17:34] <Sync_> the energy input is suprisingly low
[11:17:34] <_methods> the technology is very expensive right now though
[11:17:39] <Loetmichel> yeah
[11:17:50] <_methods> i will sell you 20 of these 5 gallons buckets for $100,000
[11:17:59] <_methods> it's a real bargain
[11:18:02] <Loetmichel> soo, already nearly an hour overtime, done for today... -> http://www.cyrom.org/palbum/main.php?g2_itemId=16170
[11:18:19] <Sync_> just get the one without watercooling pink_vampire. it'll do
[11:19:21] <pink_vampire> but all the other use water for some reason..
[11:19:32] <Loetmichel> pink_vampire: http://www.cyrom.org/palbum/main.php?g2_itemId=14139 <- there you can see the bucket with the pump on it
[11:19:40] <Loetmichel> no radiator needed at so low loads
[11:20:13] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=14148&g2_imageViewsIndex=1
[11:20:27] <Sync_> yes, but at 300W input power you can easily remove the wasted energy through the case
[11:21:22] <Loetmichel> my hiome machine has the same spindle, there you can see the whole water circuit: https://www.youtube.com/watch?v=a9Ov69t0uwo
[11:22:39] <pink_vampire> Loetmichel: do you use just regular water or distilled? or some coolant?
[11:23:06] <Loetmichel> distilled with car coolant additive
[11:23:23] <Loetmichel> to get it unsuitable for algae groth
[11:23:26] <Loetmichel> +w
[11:23:39] <Jymmm> Loetmichel: Just add salt =)
[11:23:56] <Loetmichel> Jymmm: not the brightest idea on a aluminium spindle ;90
[11:24:00] <Loetmichel> :-)
[11:24:05] <Loetmichel> <- going home now
[11:24:10] <Jymmm> Loetmichel: Better on carbon steel though =)
[11:24:41] <pink_vampire> Loetmichel: how long are you using those spindles?
[11:27:04] * Jymmm notes the sheer factor on orange/blue borg 1/4 bolts is non existent.
[11:28:06] <pink_vampire> I have no idea what do you mean.
[11:34:46] <CaptHindsight> when a Chinese spindle has only "800W" as a supposed specification, what does that really mean?
[11:35:18] <Jymmm> CaptHindsight: *I* derate all china values by 50% typically.
[11:36:04] <CaptHindsight> 800W measured how? even if you derate, what are you derating?
[11:36:22] <gregcnc> same way vacuum cleaners are rated
[11:36:46] <Jymmm> gregcnc: but vacuums suck
[11:36:55] <gregcnc> proof or what
[11:37:48] <CaptHindsight> so a 800W vacuum sucks 800W? :)
[11:38:21] <Jymmm> No, an 800W vacuum sucks 1600W but only produces 400W
[11:38:40] <OdinYggd> skunky?
[11:38:54] <gregcnc> interrupt rating
[11:39:25] <CaptHindsight> how do you convert from vacuum cleaner W to Kg of lint per sq m on a carpet?
[11:39:32] <pink_vampire> I think that the fact that the wolfgang support ww collets means that I can use it to drill with very small drill bits.
[11:39:53] <gregcnc> there's an app for that
[11:40:00] <Sync_> you get drills with a larger shank
[11:40:05] <Jymmm> CaptHindsight: Carpet? no no no, on glass with recycled paper dust ONLY
[11:40:09] <Sync_> so you don't need very small collets
[11:41:28] <gregcnc> virtually all carbide tools smaller than 1/8" tools are 1/8" shank
[11:41:59] <pink_vampire> according to the calculations of the load on the spindle even 20W spindle will be ok for the small end mills.
[11:42:23] <CaptHindsight> so 800w air cooler vs 800w water cooled spindle. Since water is heavier than air I imagine that the water cooled spindle is better for drilling
[11:43:43] <pink_vampire> the water can take more heat.
[11:43:53] <OdinYggd> Added complexity though
[11:43:59] <OdinYggd> You must maintain the fluid in that cooling system
[11:44:16] <OdinYggd> I've seen mass produced CNCs that circulate a very thin oil to cool the spindle and lubricate its bearings
[11:44:18] <witnit> anyone know a source on used or reconditioned go/nogo thread gauges
[11:44:25] <OdinYggd> 1997 Mazak mill uses an ISO 3 oil.
[11:44:29] <OdinYggd> It looks and smells like kerosene
[11:44:53] <CaptHindsight> where does the water take the heat?
[11:45:54] <gregcnc> just run a hose from the faucet in the kitchen into the spindle and return it to the drain.
[11:46:26] <CaptHindsight> gregcnc: but the water was from the faucet?
[11:46:49] <CaptHindsight> wouldn't it have to come from the drain to "return" to the drain?
[11:46:53] <pink_vampire> I have a place for that..
[11:47:01] <gregcnc> your water bill includes sewage right, put i tin the drain and make use of the utitilty
[11:47:50] <gregcnc> same as drinking water, you dispose the same way
[11:47:53] <pink_vampire> here we don't have water bill :)
[11:48:24] <CaptHindsight> gregcnc: like trickle down theory, water from higher goes lower
[11:48:37] <gregcnc> no pump even!
[11:49:05] <OdinYggd> Depending on the heat load, a pump is not required. 100 years ago more than a few engines were cooled by just a tank of water standing beside them
[11:49:16] <OdinYggd> Heated water would bubble up the pipe into the tank, cool down there, then return to the cylinder
[11:49:17] <gregcnc> if water is free start bottling it and selling it. make more money than machining shop
[11:49:44] <OdinYggd> Or you could just get a used TIG chiller
[11:49:56] <OdinYggd> These have a pump and radiator in them that is suitable for closed loop cooling of small equipment
[11:49:59] <pink_vampire> TIG chiller?
[11:50:03] <CaptHindsight> do they also measure water in W? is that where the W is from?
[11:50:36] <OdinYggd> Some TIG torches are water cooled and have a unit associated with them that circulates an antifreeze solution
[11:50:55] <OdinYggd> Usually said unit is plug in 120v for the ones I've seen and moves a few GPM of fluid
[11:51:24] <OdinYggd> But said units can be easily adapted to other cooling loads, like spindles
[11:51:48] <pink_vampire> do you think car antifreeze will work with the spindle?
[11:51:58] <OdinYggd> It'd be better than plain water at least
[11:52:16] <OdinYggd> If it is exposed to the bearings at all it should be circulating oil, not water
[11:52:22] <pink_vampire> but it can't damage something?
[11:52:40] <OdinYggd> No unless it attacks the components
[11:52:50] <OdinYggd> Use the old school green stuff. Dex-Cool is garbage and attacks aluminum
[11:53:00] <OdinYggd> Many a car has lost its cylinder heads after dex-cool attacked the block near the studs
[11:53:05] <pink_vampire> http://www.ebay.com/itm/300W-75V-4-5A-60000rpm-Water-cooled-Spindle-Motor-Inverter-Bracket-Pump-Pipe-/262319047147?hash=item3d136f01eb:g:-KgAAOSwMmBVkPtg
[11:53:14] <CaptHindsight> what is bad for the bearing in auto antifreeze? The glycol, alcohol or the water?
[11:53:19] <OdinYggd> The water
[11:53:39] <OdinYggd> Corrosion inhibitors have a service life, that's why antifreeze needs regular changing.
[11:53:54] <OdinYggd> If you let it go too long without being changed, the corrosion inhibitors wear off and your bearings rust up
[11:54:08] <OdinYggd> so if the coolant is in contact with the bearings, it should be oil cooled
[11:54:33] <pink_vampire> but they say water..
[11:54:40] <gregcnc> better check the china spindle spec then
[11:54:54] <gregcnc> use both to be sure
[11:54:54] <CaptHindsight> corrosion inhibitors sounds like anti-oxidants, vitamin C and similar
[11:55:26] <OdinYggd> check that they don't specify a special coolant blend
[11:55:29] <gregcnc> you know MB recomends vitC for cleaning coolant system
[11:55:33] <Loetmichel> pink_vampire: for about a year
[11:55:44] <OdinYggd> China will do that and conveniently forget to tell you such details
[11:56:05] <Jymmm> gregcnc: Mercedes Bena?
[11:56:13] <Jymmm> Benz
[11:56:17] <OdinYggd> I watched a harbor freight hydraulic pump burn itself up because it wanted an ISO 10 oil and was unknowingly given an ISO 64 oil
[11:56:24] <pink_vampire> Loetmichel: do you know if the water go to the bearings?
[11:56:24] <OdinYggd> Destroyed the pump in minutes
[11:56:46] <Loetmichel> pink_vampire: the bearings are outside of the water jacket
[11:57:08] <pink_vampire> so how it's get cool down?
[11:57:33] <_methods> quantum mechanics
[11:58:16] <CaptHindsight> _methods: is that show on TLC?
[11:58:20] <gregcnc> jymmm yes, google it
[11:58:30] <Loetmichel> pink_vampire: same method as the air cooled: the outside of the Stator windings has a "jacket" with aluminium fins. where the water is pumped thru
[11:58:32] <pink_vampire> _methods: it will become brittle
[11:58:34] <OdinYggd> If the coolant only flows through passages in the block and does not contact the bearings, water with antifreeze would be fine.
[11:58:46] <Jymmm> gregcnc: Og I beleive you, just wasn't sure if it was the same "MB" =)
[11:58:50] <Jymmm> Oh*
[11:58:52] <OdinYggd> On the other hand if the bearings are immersed in the coolant, said coolant must meet the manufacturer's requirements or it will be destroyed
[11:59:20] <OdinYggd> It would be like taking the oil out of a car and putting water in its place
[11:59:21] <Loetmichel> OdinYggd: the chinese spindles have no water on the bearings
[11:59:23] <OdinYggd> won't last long at lal
[11:59:31] <OdinYggd> That's good. Keeps it simple.
[11:59:42] <Loetmichel> its only a "jacket" around the windiongs that is filled with the water
[12:00:05] <CaptHindsight> Quantum Mechanics combines Quantum Leap with Overhaulin
[12:00:11] <pink_vampire> it's easy to open the spindle?
[12:00:13] <_methods> hahah
[12:00:19] <OdinYggd> yeah. so an antifreeze solution for its corrosion inhibitors circulated by a small pump through a radiator with a fan
[12:00:23] <_methods> i hope not that show will become brittle
[12:00:24] <OdinYggd> If it gets hot at all you have a bearing failure
[12:01:23] <CaptHindsight> what do they use for bearings and lube in a rotisserie oven?
[12:01:31] <pink_vampire> OdinYggd: Loetmichel: run it a year with water..
[12:01:43] <SpeedEvil> CaptHindsight: there are silicone lubs that go that high
[12:01:56] <OdinYggd> I was thinking a molebnium disulfide grease
[12:02:01] <_methods> i use the blood of newborn infants in my rotisserie
[12:02:05] <SpeedEvil> CaptHindsight: alternatively, you use SS shafts and thermal breaks so that the bearing is cold
[12:02:09] <gregcnc> isn't is just chicken or pork grease?
[12:02:09] <OdinYggd> The heat would keep it liquid, and the moly would protect the bearings at any tepmerature
[12:02:18] <OdinYggd> That too, heat slingers are a thing
[12:02:31] <OdinYggd> and those turn so slowly they might just be oillite sleeves for simplicity
[12:02:53] <pink_vampire> I
[12:02:57] <CaptHindsight> is that why rotisserie ovens only go to 450F? and not 2000F
[12:03:07] <Loetmichel> pink_vampire: more than a year
[12:03:34] <Loetmichel> OdinYggd: i didnt use the antifreeze for the corrosion inhibitors
[12:03:39] <pink_vampire> more than a year on tap water?
[12:04:00] <Loetmichel> but the algae growth in those clear plastic tubes is stunning if you use clear water ;)
[12:04:03] <gregcnc> overthinking is better than underthinking
[12:04:43] <Loetmichel> a few days on thap water, pink_vampire. then i switched to distilled water and car antifreeze for aluminium motorblocks
[12:04:44] <CaptHindsight> gregcnc: thats why I go to the roof to sort stuff out
[12:04:59] <gregcnc> crap I'm working in the basement
[12:05:15] <_methods> you're going to have to change your thinking
[12:05:45] <pink_vampire> so most of the time it was "antifreeze for aluminium motorblocks"
[12:06:01] <pink_vampire> Loetmichel: ^
[12:06:47] <Loetmichel> because: https://www.youtube.com/watch?v=87cT1M32VNY (notice the biofilm flapping around inside that indicator failure?)
[12:08:51] <pink_vampire> you an use flow meter?
[12:08:56] <pink_vampire> can*
[12:11:26] <pink_vampire> the green stuff is the antifreeze?
[12:11:29] <CaptHindsight> coolant vs antifreeze, how do you decide?
[12:11:41] <_methods> drink some and let us know
[12:11:55] <witnit> Any toolmakers out there?
[12:12:27] <pink_vampire> ?
[12:12:52] <witnit> like custom reamers/step drills, trepan tools
[12:13:19] <_methods> we sub all of ours out nowadays
[12:13:29] <_methods> unless it's a very simple custom bit or something
[12:13:41] <witnit> pretty simple
[12:14:04] <witnit> 41/64th by 3
[12:14:25] <pink_vampire> Loetmichel: ?
[12:14:34] <witnit> with a 29/64th by .375 step on end
[12:14:39] <Loetmichel> pink_vampire: i tried to build a flowmeter
[12:14:51] <Loetmichel> because i cant see if the water is still circulating
[12:14:55] <pink_vampire> this is not the way
[12:14:55] <Loetmichel> didnt work tho
[12:15:21] <pink_vampire> of course!
[12:15:24] <Loetmichel> the green stuff is green tubes
[12:15:28] <Loetmichel> the water is clear ;)
[12:15:59] <_methods> you can only be sure by drinking it
[12:16:04] <_methods> so drink the green stuff first
[12:16:18] <Loetmichel> _methods: the water is clear
[12:16:24] <Loetmichel> the TUBES are green
[12:16:30] <_methods> hahah
[12:16:35] <Loetmichel> (fish tank tubes)
[12:16:56] <pink_vampire> you need to take a tube and shape is to some know shape, and measure the deflection of it.
[12:17:04] <OdinYggd> Or make a pinwheel
[12:17:25] <OdinYggd> Machine out a 1" circle that the fluid flow enters and exits along the edge
[12:17:36] <Loetmichel> pink_vampire: oh, i will make a working one. once i find some time
[12:17:36] <_methods> just put fish in there
[12:17:37] <OdinYggd> Insert a brightly colored plastic + mounted so that it can spin in the flow
[12:17:42] <_methods> then you can see them swimming around
[12:17:42] <OdinYggd> and bolt on a piece of plexiglass as a lid
[12:17:48] <OdinYggd> When the fluid is moving you'll see it spinning
[12:18:07] <pink_vampire> Loetmichel: google for mass flow meter coriolis
[12:18:10] <Loetmichel> OdinYggd: did you see the vid?
[12:18:32] <OdinYggd> :)
[12:18:36] <pink_vampire> Loetmichel: yes!
[12:19:24] <Loetmichel> pink_vampire: are you OdinYggd?
[12:19:25] <OdinYggd> I can't actually watch videos right now, all I get is a slideshow
[12:19:34] <pink_vampire> opss
[12:19:37] <OdinYggd> but I see you already did that with the pinwheel
[12:20:15] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=14334 <- first versuion. didnt work
[12:20:47] <pink_vampire> https://www.youtube.com/watch?v=-698Lwahn74
[12:20:58] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=14349 <- second version, from the vid. Didnt work either
[12:20:59] <pink_vampire> how it's work?
[12:21:36] <OdinYggd> Second version should have worked.
[12:21:40] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=14352 <- third ad fourth version i plan on building when i have the time ;)
[12:21:42] <OdinYggd> How tight was the pinwheel on the shaft?
[12:21:49] <OdinYggd> It has to be kinda sloppy so that it turns if you sneeze on it
[12:22:03] <OdinYggd> The fluid it works in will lubricate it well enough
[12:22:04] <Loetmichel> it was kinda sloppy
[12:22:53] <Loetmichel> i think i made a flow direction error there
[12:23:02] <pink_vampire> Loetmichel: but this is NOT how mass flow meter work.
[12:23:03] <Loetmichel> the first one actually worked kind of "better
[12:23:24] <CaptHindsight> do they use mirrors to reverse the direction of water?
[12:23:26] <OdinYggd> pink_vampire that isn't a mass flow meter. that's just a yes/no fluid is omving
[12:23:37] <_methods> hydro-mirror
[12:23:41] <Loetmichel> i think i will go for the v4 wiht the "reversed gear pump"
[12:24:02] <OdinYggd> Also you don't actually want the rotor to have side seals
[12:24:09] <OdinYggd> It gets dragged along by the fluid slipping past it
[12:24:19] <pink_vampire> what about Magnetic flow meter?
[12:24:44] <CaptHindsight> if you drive towards a mirror how do you know which direction you are going?
[12:24:48] <_methods> http://www.ebay.com/itm/G1-2-Water-Flow-Hall-Sensor-Switch-Flow-Meter-Flowmeter-Counter-1-30L-min-Clear-/251928079873
[12:25:01] <_methods> $6
[12:25:07] <_methods> shipped
[12:25:09] <Loetmichel> no need for that
[12:25:28] <_methods> too simple?
[12:25:39] <Loetmichel> i just wanted an indicator if the spindle sitll has some flow left or if the biofilm already clogged it
[12:25:45] <Loetmichel> happened in the company once ;)
[12:25:53] <OdinYggd> bubbles.
[12:25:57] <OdinYggd> best indicator around
[12:26:00] <Loetmichel> not too simple
[12:26:06] <pink_vampire> distilled water is impossible to measure with magnetic flow meter
[12:26:06] <OdinYggd> make a little venturi to suck some air into the return side
[12:26:09] <Loetmichel> to much work to get that indicated
[12:26:11] <OdinYggd> that way they can leave again in the tank
[12:26:31] <OdinYggd> you don't want it in the supply side because the bubbles will disrupt the fluid flow too
[12:26:50] <OdinYggd> Also if the algae problem is that bad, what stops it from coating the heat exchanger and absolutely destroying your ability to exract heat?
[12:26:52] <Loetmichel> OdinYggd: yeah, that works but is a bit on the bad side becuase the pump isnt able to fill the system
[12:26:56] <OdinYggd> Heat exhangers must be clean to work effectively
[12:27:00] <Loetmichel> not enough pressure
[12:27:21] <pink_vampire> http://www.coleparmer.com/Product/Paddle_Flow_Indicator_0_5_to_10_L_min_for_1_4_to_5_16_ID_Tubing/UX-06297-06?referred_id=778&gclid=CIesutrZtssCFYMdgQodu7MESQ
[12:27:45] <Loetmichel> so i have to fill it by sucking on the output tube every time i switch on... not really desireable with god knows what swims in that water ;)
[12:28:11] <OdinYggd> The battery watering system I use to maintain a nearly 4000lb lead-acid for one of the forklifts here has a little pinwheel in it though
[12:28:17] <pink_vampire> I know what is the problem in your flow indicator.
[12:28:21] <Loetmichel> pink_vampire: thats what i tried to dublicate ;)
[12:28:23] <Jymmm> CaptHindsight: Mirrors? Nah, they uses a DPDT electrical switch to fwd/rev fluid flow, you just need those fluid-to-electron-and-back waterproof crimp on connectors.
[12:28:30] <OdinYggd> I can probably snag a picture of it in a little while
[12:28:44] <gregcnc> Wait...DPDT valves?
[12:28:48] <OdinYggd> That uses a gravity flow from an approximately 3 foot height
[12:28:51] <_methods> yeah
[12:28:55] <_methods> for the hydro-mirrors
[12:28:59] <Jymmm> gregcnc: Not valves, SWITCHES
[12:29:02] <OdinYggd> All it does is flows distilled water into the cells of the battery, float valves stopping it when the battery is full
[12:29:08] <gregcnc> nono valves for water
[12:29:19] <OdinYggd> DPDT valves are a thing
[12:29:22] <OdinYggd> they're called 4-way valves
[12:29:27] <Jymmm> gregcnc: You need to use the fluid-to-electron connectors
[12:29:31] <pink_vampire> you have to make the shaft longer then the fan.
[12:29:32] <OdinYggd> and you can buy cartrdge valves with this function
[12:30:06] <Jymmm> gregcnc: wikipedia says so... https://en.wikipedia.org/wiki/Electron_liquid
[12:30:17] <gregcnc> I've never seen DPDT valves at harbor freight
[12:30:22] <_methods> hahah
[12:30:26] <_methods> you have to look harder
[12:30:30] <pink_vampire> and make it pointy so it will rotate freely
[12:30:34] <_methods> everything is at harbor freight
[12:30:39] <pink_vampire> Loetmichel: ^
[12:30:39] <OdinYggd> cause they aren't called DPDT valves
[12:30:40] <Jymmm> gregcnc: Isle 13, left side, bottom shelf, in the back,
[12:30:43] <OdinYggd> They are called 4-way valves
[12:30:57] <_methods> the longer you stay at harbor freight the more stuff you find
[12:31:22] <_methods> there is a mr fusion in there somewhere
[12:31:29] <Jymmm> gregcnc: Follows this model... http://scitation.aip.org/content/aip/journal/pop/21/12/10.1063/1.4903907
[12:31:34] <gregcnc> i confess that I leave the second I can't stand the place
[12:31:54] <_methods> never go in there on a sunday after 1
[12:32:02] <_methods> it's like cocoon up in there
[12:32:11] <Jymmm> s/after 1//
[12:32:15] <OdinYggd> Also have you tried motion industries for this stuff
[12:32:28] <_methods> hahah
[12:32:36] <_methods> yeah sunday probably bad day to go ever
[12:32:49] <OdinYggd> Most of the valves I've installed recently were from them, SMC brand pneumatic and hydraulic components
[12:33:58] <gregcnc> jymmm is electron fluid like blinker fluid or which is the knock off china brand?
[12:34:50] <Jymmm> gregcnc Like brake fluid and bleached in pre-measured two-part bottles.
[12:35:09] <Jymmm> (Uh, dont do that btw)
[12:35:14] <pink_vampire> Loetmichel: are you here?
[12:35:20] <Loetmichel> yes
[12:36:05] <pink_vampire> Loetmichel: http://i.imgur.com/EdZ81DD.png
[12:36:09] <Loetmichel> but i am more "there" than "here" from your viewpoint :-)
[12:36:21] <pink_vampire> you see the pointy shaft?
[12:36:43] <Loetmichel> i see circular caps on the shaft ends
[12:37:15] <Loetmichel> and as i already said: i will go with the fourth design i made once i find the time. the right one:
[12:37:26] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=14352&g2_imageViewsIndex=1
[12:37:32] <pink_vampire> but is a bit tapered..
[12:38:27] <pink_vampire> also.. the lower the flow rate the smaller you need to make it.
[12:42:17] <gregcnc> Jymmm I won't have to go to HF just remembered I have DPDT electron valves in my amplifer
[12:42:38] <Jymmm> gregcnc: LICK EM!
[12:42:55] <gregcnc> will it sound better?
[12:43:38] <Jymmm> gregcnc: Uh.... Yes, YES IT WILL and will give you everlasting life, or death, one of the two!
[12:44:04] <gregcnc> isn't that the same depending on what you believe
[12:44:14] <Jymmm> lisk it and find out
[12:44:18] <Jymmm> lick*
[12:45:05] * Jymmm is annoyed that "Google music" loves to sequencially name all the fusic files *argh*
[12:45:27] <CaptHindsight> I've seen them tape ribbons to air conditioners to see if the air is blowing. Does this also work for water?
[12:46:00] <Jymmm> CaptHindsight: Yes, but you need to tape at least 10 air conditioners to the fluid delivery sysem
[12:47:03] <CaptHindsight> I once taped a ribbon to the end of a garden hose. The water came out but I could not see the ribbon.
[12:47:59] <CaptHindsight> thinking about it now, maybe I should stand to the side of the hose like I did the air conditioner
[12:56:41] * SpeedEvil whips his hose back and forth.
[12:56:49] <gregcnc> jymmm https://youtu.be/RY6_VXLX3sw?t=19s
[12:56:53] <SpeedEvil> https://www.youtube.com/watch?v=RHqN6CTOdzA - now this is fun
[12:57:09] <SpeedEvil> CNC milling of PCBs and ICs and ... to determine 3d structure
[13:00:55] <maxcnc> hi
[13:03:38] <pink_vampire> what kind a spindle he use to cut the silicon in the semiconductor?
[13:04:57] <pink_vampire> SpeedEvil: ^
[13:05:32] <Sync_> just the same he does for everything else
[13:05:38] <Sync_> he has one of those chinese routers
[13:06:38] <maxcnc> oh china product failed today but refound after 1 week of use only
[13:06:59] <maxcnc> impressed
[13:06:59] <maxcnc> it might be crap bevor ;-)
[13:07:12] <maxcnc> or he did know about and hope it stands
[13:09:07] <pink_vampire> BRB
[13:14:20] <_methods> crap behavior?
[13:14:24] <_methods> this is crap behavior
[13:14:27] <_methods> http://imgur.com/gallery/LeTteZm
[13:15:38] <maxcnc> im off
[13:19:52] <CaptHindsight> _methods: thats why dogs go outside, they would just waster toilet water inside
[13:20:03] <CaptHindsight> waster/waste
[13:22:16] <_methods> flow meter?
[13:22:52] <CaptHindsight> oh yeah forgot about that, they would clog the flowmeter as well
[13:23:05] <_methods> put a pinwheel in there
[13:24:14] <CaptHindsight> http://www.preventchildabuseny.org/files/4112/8682/8260/hdr_order_pinwheels.jpg
[13:24:53] <CaptHindsight> would a dog know how to blow on it?
[13:25:20] <_methods> haha
[13:25:32] <pink_vampire> shit! shit!
[13:26:53] <pink_vampire> I was about to order the 60K rpm spindle, and then I saw Voltage:220-240VAC
[13:27:19] <witnit> should be more efficient that way!
[13:27:36] <CaptHindsight> 30k rpm at 120V?
[13:27:38] <pink_vampire> I have only 110V
[13:27:58] <_methods> oh no
[13:28:07] <gregcnc> you just need to find a second outlet that uses the other leg?
[13:28:11] <_methods> just get some batteries taht add up to 10v
[13:28:17] <_methods> then attach them to the motor
[13:28:50] <_methods> 110+10= 120!!!!
[13:28:52] <witnit> pink_vampire: you have 220 single phase you just dont have 220 three phase
[13:29:03] <CaptHindsight> _methods: are the other outlets matched for 0V power?
[13:29:06] <_methods> math FTW
[13:29:09] <pink_vampire> witnit: no
[13:29:14] <witnit> oh
[13:29:17] <witnit> ok
[13:29:19] <pink_vampire> I'm in NY
[13:29:32] <pink_vampire> we have here 120V
[13:29:35] <pink_vampire> AC
[13:29:52] <_methods> yeah
[13:29:54] <witnit> yeah
[13:29:56] <witnit> ac
[13:29:57] <_methods> they only have 120 in ny
[13:29:58] <pink_vampire> according to the ups is 122v
[13:30:17] <_methods> that's why all the businesses left
[13:30:22] <_methods> they needed 220
[13:30:23] <pink_vampire> you can connect 2 phases and get 208
[13:30:27] <_methods> so they all went to other states
[13:30:47] <witnit> I dont understand the reason
[13:30:49] <CaptHindsight> 120 + 120 = 208
[13:30:55] <_methods> maths
[13:30:59] <witnit> not enough copper consumption?
[13:31:00] <pink_vampire> CaptHindsight: AC
[13:31:09] <_methods> don't forget the AC
[13:32:07] <pink_vampire> there is difference of 120 degrees between the phases
[13:32:19] <OdinYggd> ^
[13:32:28] <OdinYggd> <_methods> they only have 120 in ny
[13:32:29] <OdinYggd> wrong.
[13:32:33] <OdinYggd> you can get up to a few kilovolts in NY
[13:32:47] <_methods> wut?
[13:32:51] <OdinYggd> Most houses only have 240v split-system though, making the outlets 120v
[13:32:52] <_methods> you mean they have other voltages there?
[13:32:57] <CaptHindsight> 120 + 120 + 120 = ? ..... A) 312, B) 208, C)120, D)all the above
[13:32:57] <pink_vampire> I'm with single phase
[13:33:01] <OdinYggd> Industrial environments can have plenty of other options
[13:33:11] <_methods> man thnx for clearing this up
[13:33:13] <OdinYggd> Where I work has 480v, 277v, 240v, 208v, 120v, and 60v
[13:33:19] <OdinYggd> its up to me to keep track of what system has what voltage
[13:33:22] <OdinYggd> I got this :)
[13:33:45] <pink_vampire> I'm with single phase 120V ac :(((
[13:34:21] <OdinYggd> Standard outlet is 120v single phase, appliance connections can be 240v single phase with or without the netural
[13:34:23] <witnit> I would not like such a situation, maybe have to build a phase converter
[13:34:29] <pink_vampire> any advise for 60k rpm spindle / vfd
[13:34:35] <witnit> or something of the sortyt
[13:34:39] <OdinYggd> use an air motor
[13:34:41] <CaptHindsight> thanks for the laughs today everyone, hasta banana
[13:34:45] <OdinYggd> die grinder clamped to the head
[13:34:51] <OdinYggd> this will get you a few thousand RPM easily
[13:35:04] <OdinYggd> Plus they are usually self-cooling
[13:35:18] <pink_vampire> that also option
[13:35:40] <pink_vampire> but I can't use something very laud here.
[13:36:15] <pink_vampire> I'm on second floor..
[13:37:41] <witnit> next project for you will be noise cancelling floors/walls
[13:38:05] <_methods> ^^
[13:38:07] <FinboySlick> Go pro. Do active noise cancellation by bolting actuators to the feet of your machine.
[13:38:17] <_methods> or bolt them to your feet
[13:38:26] <_methods> to cancel out the world
[13:38:57] <pink_vampire> FinboySlick: what do you mean?
[13:39:24] <FinboySlick> _methods: Isn't that a David Bowie song? The man who cancelled the world?
[13:39:25] <gregcnc> seriously though I went through this BS for my franken mill and would just buy an air chinaspindle and be done with it.
[13:40:01] <FinboySlick> pink_vampire: You know, those BOSE noise cancelling headphones? The ones with a microphone that listen at the outside world and play the reverse of what they hear in your headphones?
[13:40:43] <_methods> hahah
[13:40:47] <_methods> possibly?
[13:40:48] <CaptHindsight> pink_vampire: http://graphics7.nytimes.com/images/2004/08/02/business/02pate.xl.jpg this man feels no waves since they actively cancel them
[13:40:49] <_methods> major tome
[13:41:28] <pink_vampire> ok..
[13:41:35] <pink_vampire> Please I need some help.
[13:41:39] <gregcnc> you still need a vaccum to eat the dist or it will get everywhere
[13:41:44] <gregcnc> dust
[13:41:47] <FinboySlick> _methods: No. It's the sequel to 'The mane who sold the world': 'the man who cancelled the order'.
[13:42:02] <_methods> hahah
[13:42:08] <_methods> i'll have to check that one out
[13:42:29] <pink_vampire> gregcnc: just for 5 min at the end..
[13:42:40] <FinboySlick> pink_vampire: You're looking for a fast spindle?
[13:42:48] <pink_vampire> yes
[13:42:59] <_methods> has to work with 110v though
[13:43:00] <FinboySlick> pcb?
[13:43:01] <_methods> not 120
[13:43:06] <pink_vampire> yes,
[13:43:16] <pink_vampire> pcb, graphite..
[13:43:16] <_methods> AC
[13:43:30] <pink_vampire> yes 120V AC
[13:43:41] <_methods> i thought you said you only had 110
[13:44:00] <pink_vampire> 110 120..
[13:44:01] <FinboySlick> Well, if you aren't going production, mount a dremel to the side of your spindle. Buy 3-4 of them and pick the one with the least crappy spindle.
[13:44:10] <gregcnc> http://www.sherline.com/4335pg.htm
[13:44:48] <pink_vampire> too slow.
[13:45:00] <_methods> gregcnc: that spindle has already been recommended to her like 3 times today
[13:45:02] <FinboySlick> 10k rpm too slow?
[13:45:07] <_methods> she's been draggin this out all day
[13:45:16] <witnit> hahaha not pink_vampire
[13:45:25] <pink_vampire> _methods: no
[13:45:32] <_methods> pink_vampire: yes
[13:45:43] <pink_vampire> find in the log
[13:45:55] <FinboySlick> Enough, children.
[13:45:55] <_methods> you find it
[13:45:57] <gregcnc> make it yourself?
[13:46:01] <witnit> welp, nighty night!
[13:46:05] <witnit> take care!
[13:46:15] <FinboySlick> Anyway. What speed/power do you need?
[13:46:23] <pink_vampire> there is the wolfgang..
[13:46:53] <pink_vampire> I want to be able to work with very small endmills
[13:46:59] <_methods> and here we go with this again
[13:47:21] <pink_vampire> 0.3mm for pcb, and 1/32" for metals.
[13:47:29] <pink_vampire> mute _methods
[13:47:39] <FinboySlick> pink_vampire: http://www.ebay.ca/itm/2-2KW-WATER-COOLED-SPINDLE-MOTOR-ER20-VFD-INVERTER-DRIVE-80MM-DIAMETER-CNC-/252029788256?hash=item3aae256060:g:-y4AAOSwEetWA6To and an aquarium pump.
[13:48:16] <FinboySlick> It'll be moderately quiet.
[13:48:43] <CaptHindsight> http://www.ebay.com/itm/261878403099 runs on DC, found just about anywhere
[13:48:58] <CaptHindsight> $84.50
[13:49:34] <pink_vampire> http://www.ebay.com/itm/1-8-CNC-Router-Spindle-WW-650-25-000rpm-Shapeoko-Taig-Sherline-Wolfgang-/311539274300?hash=item488930123c:g:BfgAAOSwp5JWaRqg
[13:49:40] <pink_vampire> how about that?
[13:50:03] <CaptHindsight> the bracket is shaped funny
[13:50:08] <CaptHindsight> worries me
[13:50:28] <pink_vampire> it use the watch maker collets.
[13:51:04] <gregcnc> 8 years ago https://www.youtube.com/watch?v=DT0xDY31ZX0
[13:51:13] <FinboySlick> Not sure that RC car motor is going to be very happy with long jobs.
[13:53:25] <pink_vampire> I want to do looong 3d machining.
[13:53:38] <pink_vampire> I need something that will last.
[13:53:44] <_methods> hahhahah
[13:54:00] <_methods> tha's what she said
[13:54:38] <pink_vampire> and..
[13:54:41] <FinboySlick> pink_vampire: You have to be a bit realistic too. Spinning something that fast for extended periods is not something you do on a budget.
[13:55:11] <FinboySlick> The chinese watercooled thing (if you get lucky with the bearings) is probably your best bet.
[13:55:52] <pink_vampire> it's easy to replace the bearings?
[13:56:08] <CaptHindsight> is there a Chinese ice cooled spindle?
[13:56:37] <_methods> ahhhh now we get to the real conversation
[13:56:39] <_methods> bearings
[13:56:47] <CaptHindsight> http://www.odec.ca/projects/2006/rudn6i2/images2/bot5bg.jpg ice can freeze water
[13:56:48] <gregcnc> preferebly dry ice
[13:56:48] <FinboySlick> pink_vampire: No.
[13:57:08] <_methods> that's why i just use liquid helium on my bearings
[13:57:13] <_methods> they stay cool all day
[13:57:32] <pink_vampire> but some give you extra bearings
[13:58:11] <gregcnc> that's just so you're not entirely pissed when it dies
[13:58:22] <FinboySlick> pink_vampire: Well, I'm talking about the watercooled units.
[13:58:49] <CaptHindsight> How to Make Chinese Shaved Ice https://www.youtube.com/watch?v=YtFEvu_a6MI
[13:58:54] <pink_vampire> http://www.ebay.com/itm/FOUR-BEARING-65MM-1-5KW-ER11-WATER-COOLED-SPINDLE-MOTOR-VFD-DRIVE-INVERTER-/261935861901?hash=item3cfc98108d:g:zTMAAOSwpDdU3E2S
[13:59:13] <_methods> should you use antifreeze in that
[13:59:21] <_methods> what should you keep the water in?
[13:59:26] <FinboySlick> pink_vampire: They're not extra, they come inside the spindle.
[13:59:55] <CaptHindsight> if bearing just wear out, why don't they just make spindles without bearings?
[14:00:11] <_methods> ^^
[14:00:15] <gregcnc> start a kickstarter
[14:00:16] <_methods> oh damn that's brilliant
[14:00:22] <_methods> magnetic spindle
[14:00:41] <_methods> you could make it work with 110v
[14:00:44] <_methods> that's all they have in nyc
[14:00:46] <FinboySlick> _methods: ABB has a compressor like that actually.
[14:00:55] <FinboySlick> No wait, Timken.
[14:01:23] <pink_vampire> I have a box of abb parts here
[14:01:40] <SpeedEvil> Magnetic spindles - when you want to avoid the cost of bearing replacement.
[14:01:52] <SpeedEvil> Said nobody who's seen the cost - ever.
[14:02:43] <CaptHindsight> but these would be low cost Chinese magnetic spindles
[14:03:45] <CaptHindsight> MY compatible
[14:03:53] <CaptHindsight> NY even
[14:04:16] <_methods> that 110v is a killer
[14:05:52] <CaptHindsight> shheesh, salt, sugar, cigarettes, bacon and now 110V
[14:06:10] <CaptHindsight> whats left?
[14:06:28] <_methods> insanity
[14:08:16] <FinboySlick> Damn, still wrong. It wasn't Timken either, it was SKF.
[14:08:31] <FinboySlick> https://www.youtube.com/watch?v=_Ed2tG22MlU
[14:08:49] <CaptHindsight> I have to go read a book or something for a while, bbl
[14:09:21] <_methods> hahah later
[14:16:14] <_methods> stellerator spindle motor
[14:16:43] <pink_vampire> https://www.youtube.com/watch?v=DzWolYW_MKc
[14:17:23] <pink_vampire> he is soo handsome ^
[14:18:31] <gregcnc> http://www.vfds.com/1hp-120V-weg-vfd-CFW100040SAZ
[14:20:12] <pink_vampire> 2.5-15 kHz
[14:20:31] <pink_vampire> weg it's a good brand?
[14:22:12] <pink_vampire> gregcnc: ^
[14:22:17] <gregcnc> http://www.vfds.com/variable-frequency-drives#/input-voltage-115V-a21-v115V/sort=p.sort_order/order=ASC/limit=15
[14:24:50] <pink_vampire> if the motor is 300W
[14:25:31] <pink_vampire> the vfd need to be less then that or more then that?
[14:26:52] <pink_vampire> gregcnc: ^
[14:26:56] <CaptHindsight> _methods: https://www.youtube.com/watch?v=_nG1V773LVM&list=PL525B2FC05801BF49
[14:27:26] <pink_vampire> http://www.ebay.com/itm/95W-20000-60000rpm-natural-cooled-spindle-motor-CNC-Engraving-Permanent-Torque-/201200221593?hash=item2ed877bd99:g:RSMAAOSw8cNUR31N
[14:27:35] <pink_vampire> what kind a collet is that?
[14:28:27] <gregcnc> better ask them about their "joint of nose" spec
[14:28:37] <CaptHindsight> _methods: https://www.youtube.com/watch?v=-2VLIO14dns the soundtrack of your life
[14:28:43] <_methods> CaptHindsight: indeed
[14:29:14] <_methods> i needed that
[14:30:23] <_methods> http://55tools.blogspot.com/
[14:30:29] <_methods> since we're playing what is it?
[14:36:37] <pink_vampire> http://www.ebay.com/itm/300w-ER8-water-cooled-Permanent-Torque-CNC-spindle-motor-4-5A-60000rpm-48mm-new-/201182263706?hash=item2ed765b99a:g:ILQAAOSwVFlUKhPm
[14:36:45] <CaptHindsight> I've never seen one that small before
[14:36:52] <pink_vampire> this one is 75V 1000HZ
[14:37:16] <CaptHindsight> we had one for setting the preload on large cheese wheels
[14:37:18] <pink_vampire> what kind of vfd i need for that?
[14:37:56] <gregcnc> "Voltage and current: AC75v common household electric, must through the inverter output"
[14:38:38] <CaptHindsight> "do not serve with rice"
[14:38:51] <gregcnc> it may not be good enough
[14:39:01] <gregcnc> " (1) to control the spindle actual time worked. Theoretically prohibit spindle 24 hours of continuous work, operating 12 hours per spindle Spindle let rest at least 2 hours, in order to prevent the formation of shortened due to mechanical fatigue life of the spindle."
[14:40:01] <Jymmm> gregcnc: Determined... https://www.youtube.com/watch?v=iwApXCaLcaA
[14:44:21] <gregcnc> for an avg 100k views?
[14:45:09] <CaptHindsight> only on LFN: licking fetishists network
[14:46:25] <_methods> hahah
[14:48:10] <Jymmm> We know it's _methods under that mask!
[14:48:35] <Jymmm> or pete, or both! Yeah BOTH!!!
[14:48:39] <_methods> i've been figured out
[14:48:41] <_methods> doh
[14:48:59] <_methods> wow so there's a lot of lickin videos there
[14:49:37] <Jymmm> _methods: yo've been busy it appears
[14:49:37] <SpeedEvil> http://i.imgur.com/bBanHN5.jpg - related
[14:49:54] <_methods> i do waht i can to further mankind
[14:50:19] <_methods> not related though
[14:50:21] <_methods> http://laughingsquid.com/loyal-penguin-travels-hundreds-of-miles-to-repeatedly-visit-the-brazilian-man-who-saved-him/
[14:50:41] <_methods> penguins, man's best friend
[14:50:55] <gregcnc> i saw the penguin
[14:51:19] <_methods> http://www.independent.co.uk/news/world/americas/syrian-refugees-in-canada-got-housed-in-same-hotel-as-vancoufur-furry-convention-and-the-children-a6921341.html
[14:51:25] <_methods> sweet jesus
[14:51:28] <_methods> poor refugees
[14:55:49] <gregcnc> Canada wasn't their first choice?
[14:56:28] <_methods> not after the furries got ahold of them
[14:58:50] <CaptHindsight> why does Drump want to build a wall to keep Furrys out?
[14:59:14] <CaptHindsight> (pl) Furries
[15:00:21] <CaptHindsight> is worried that this could possible happen? https://www.youtube.com/watch?v=ykElO4ze1HU
[15:03:28] <XXCoder> I always found furries idea strange but whatever as long as everyone in it consent to it
[15:23:32] <pink_vampire> gregcnc: I was in the phone with a local automation company about vfd for 75V 1000HZ
[15:23:44] <pink_vampire> ZERO success
[15:27:22] <CaptHindsight> 150V / 2 = 75V, 2000Hz / 2 = 1000Hz, or maybe parallel... 37.5V x 2 = 75V, 500Hz x 2 = 1000Hz, but my maths might be wrong
[15:29:20] <pink_vampire> I don't know what I need.
[15:30:08] <pink_vampire> if the motor is 75V 1000HZ, I need something that get 120VAC 60HZ and provide 0 to 1000HZ 75V?
[15:33:49] <SpeedEvil> a VFD
[15:33:59] <SpeedEvil> That can go to 1000Hz
[15:34:26] <gregcnc> you should just be able to set the motor voltage to 75V on the VFD.
[15:36:17] <CaptHindsight> gregcnc: your advice just might work
[15:36:33] <gregcnc> it might, but you'd have to read the manul to be certain
[15:36:36] <robin_sz> so, pendants ...
[15:38:32] <DRGray> hey when anodising what should fiz more your cathode or the bit your anodising?
[15:39:49] <CaptHindsight> you want to knock the bubbles from the surface of the parts being treated
[15:40:33] <DRGray> my parts has tons of bubbles shooting off it
[15:40:39] <DRGray> its firing them off like a machine gun
[15:40:52] <DRGray> but my dye isnt sticking
[15:40:57] <robin_sz> you should start low current
[15:41:05] <robin_sz> and then increase ...
[15:41:18] <robin_sz> otherwise you get a very "soft" film
[15:41:33] <CaptHindsight> dye needs pores
[15:41:43] <robin_sz> yes
[15:41:48] <DRGray> ok,, it shouldnt be bubbling like crazy then?
[15:42:05] <DRGray> i seem to be a bit rubbish at this
[15:42:09] <robin_sz> not when you first dip it in, no
[15:42:23] <robin_sz> how big is the part?
[15:42:41] <DRGray> small about 5cm * 5cm * 1cm
[15:43:07] <robin_sz> so about 10 sqaure inches in total
[15:43:24] <DRGray> yeah
[15:45:16] <robin_sz> so, start with a current of about 0.5A
[15:45:29] <pink_vampire> all the vfds that I see id 230V output.
[15:45:42] <pink_vampire> even if the input is 120C
[15:45:46] <pink_vampire> even if the input is 120V*
[15:45:56] <DRGray> ok super low
[15:45:59] <DRGray> at 12 volts?
[15:46:04] <robin_sz> leave it at .5A for 10 to minutes
[15:46:19] <robin_sz> turn it up to 1.5A and leave it for 30 minutes
[15:46:35] <robin_sz> at whatever voltage is needed to get 0.5A
[15:46:58] <pink_vampire> but if the motor is 1000hz and the vfd can go up to 2500hz.
[15:47:06] <gregcnc> then the 75V spindles china sells with 230VAC VFD must all start fires
[15:47:12] <DRGray> ok ill give it a wurl
[15:47:30] <DRGray> postive on the part negative on the cathodes
[15:47:46] <robin_sz> yes
[15:47:55] <DRGray> will it change colour a lot? go yellowy?
[15:47:57] <pink_vampire> what happen if you take 1000HZ motor with 2500HZ VFD?
[15:48:05] <robin_sz> 10% sulphuric, right?
[15:48:14] <gregcnc> what happens if you drive 60 in a 30 zone?
[15:48:39] <pink_vampire> to the car.. nothing,,
[15:48:50] <robin_sz> should not go yellowy really, shoudl stay bright
[15:49:09] <pink_vampire> but it will go faster?
[15:49:18] <pink_vampire> 120,000 rpm?
[15:49:20] <gregcnc> maybe
[15:49:29] <DRGray> it was mixed to what a guide said
[15:49:34] <robin_sz> ok
[15:49:44] <robin_sz> well, you know the procedure
[15:49:46] <DRGray> i think it was about 10%
[15:49:56] <robin_sz> you starting on a fresh part?
[15:50:00] <pink_vampire> I never use it. I have no idea.
[15:50:00] <DRGray> i ditn mix it though
[15:50:03] <DRGray> but i can check that
[15:50:07] <CaptHindsight> DRGray: http://www.finishing.com/67/01.shtml
[15:51:10] <DRGray> yes you sent me this page last time
[15:51:14] <robin_sz> as a guide, somethign around 20 amps a square foot will build 1 micron of fim per minute
[15:51:24] <robin_sz> *film
[15:51:43] <robin_sz> maybe a little more
[15:51:45] <DRGray> maybe ill have better luck tomorrow
[15:51:58] <robin_sz> there is no luck involved ;)
[15:52:08] <robin_sz> what dye are you using?
[15:52:24] <DRGray> it was a sort of powder i bought it of an anodising company
[15:52:31] <robin_sz> black?
[15:52:39] <DRGray> ive just ordred a different one though as i wanted to rule that out
[15:52:41] <DRGray> yeah black
[15:52:56] <robin_sz> and you have a good pan of boiling water to seal it?
[15:53:14] <robin_sz> or some silly acetate seal?
[15:53:15] <DRGray> well. no point sealing it if the dye just runs off when you pull it out
[15:53:23] <robin_sz> true dat
[15:53:27] <DRGray> i do have some sealant for it
[15:53:36] <robin_sz> boiling water is fine
[15:53:40] <DRGray> the die isnt taking at all
[15:53:57] <robin_sz> did you etch it first?
[15:53:59] <DRGray> but the part was fizzy like a sherbert fountain
[15:54:11] <DRGray> etched. desmuted
[15:54:16] <robin_sz> right
[15:54:18] <DRGray> etched rinsed.
[15:54:21] <DRGray> desmuted rinsed
[15:54:22] <robin_sz> well, start 0,5A
[15:54:26] <DRGray> then stuck it in for 45 minutes
[15:54:27] <CaptHindsight> DRGray: what are you using for a power supply?
[15:54:34] <DRGray> ive tried 15 mintues and 20 mintues
[15:54:43] <robin_sz> what current was that at?
[15:55:03] <CaptHindsight> are you using DI water or Natural Spring Water?
[15:55:27] <DRGray> about 0.8amps
[15:55:36] <DRGray> de-ornised
[15:55:36] <robin_sz> not far out then
[15:56:12] <robin_sz> what grade ally?
[15:56:15] <DRGray> if the current was to low would it bubble
[15:56:17] <DRGray> that im not sure
[15:56:25] <robin_sz> yes it always bubble
[15:56:42] <robin_sz> volume of bubbles directly proportional to current
[15:56:56] <DRGray> lots of bubbles lots of current?
[15:57:09] <robin_sz> each coulomb of charge produces a certain volume of gas
[15:57:12] <robin_sz> yes
[15:57:20] <CaptHindsight> whats the voltage when you start?
[15:57:42] <DRGray> 6082
[15:57:49] <DRGray> 20 volts
[15:57:56] <CaptHindsight> too high
[15:58:12] <DRGray> i have a 25 ohm resistor in the circuit
[15:58:44] <robin_sz> if you maintain 0.5A .. you should see the voltage increase as the film gets thicker
[15:59:02] <CaptHindsight> sounds like you're burning the parts
[15:59:04] <DRGray> i have a desktop power unit i can try tomorrwo you can set the amperage on it
[15:59:13] <robin_sz> that would be better
[15:59:16] <DRGray> so try a lower voltage
[15:59:27] <robin_sz> lower current
[15:59:36] <robin_sz> and just monitor the voltage
[15:59:40] <DRGray> yeah you can choose voltage or current
[15:59:51] <DRGray> ill stick it on current and stick it at 0.5 volts
[15:59:53] <DRGray> amps
[15:59:53] <robin_sz> you should see it rise as the film thickness builds
[15:59:54] <DRGray> i mean
[16:00:27] <DRGray> thanks for all the tips
[16:00:34] <robin_sz> I put " a few " parts out for anodising each year, and we have done it in-house on occasion
[16:00:42] <DRGray> on another note my little proxxon is cutting like a tropper
[16:00:51] <CaptHindsight> since the resistance increases as the anodic film builds if the current is kept constant the voltage will rise
[16:00:57] <CaptHindsight> see Ohms law
[16:01:03] <DRGray> well maybe i should of just go them done
[16:01:06] <DRGray> it would of been cheaper
[16:01:19] <robin_sz> get a copy of "Cannings Handbook" .. its the bible for industrial electrochemistry
[16:01:20] <DRGray> i was hoping i could get the hang of it as then its a neat thing to be able to do
[16:01:30] <robin_sz> its easy once you nail it
[16:01:31] <CaptHindsight> but then you wouldn't be learning a skill or a few
[16:01:36] <robin_sz> easiest process going
[16:01:59] <robin_sz> we put out maybe ... I dunno, 20k USD a year of anodising
[16:02:01] <DRGray> hah
[16:02:11] <DRGray> 6082 should anodise though?
[16:02:16] <robin_sz> I know ALL the faults ;)
[16:02:54] <DRGray> http://www.ebay.co.uk/itm/CANNING-HANDBOOK-ON-ELECTROPLATING-birmingham-1949-/262320669702?hash=item3d1387c406:g:2ToAAOSwYlJW2r3W
[16:03:04] <robin_sz> not one I use, let me read up
[16:03:05] <DRGray> i really want to get the hang of it
[16:03:21] <DRGray> do you use specialist dyes?
[16:03:46] <CaptHindsight> I make my own dyes
[16:04:00] <robin_sz> yep, almost any dye will work
[16:04:06] <robin_sz> food colouring !
[16:04:55] <CaptHindsight> what if you want sunlight resistance?
[16:05:03] <DRGray> i feel tricked
[16:05:28] <DRGray> i must be doing some dum stuff
[16:05:40] <robin_sz> 6082 is marked as "not suitable"
[16:05:40] <DRGray> is there anything special used to degrease?
[16:05:49] <DRGray> heh
[16:05:52] <DRGray> excellent
[16:05:57] <DRGray> whats the best?
[16:06:02] <robin_sz> just practice on some pure ally
[16:06:06] <robin_sz> 1050
[16:06:13] <robin_sz> are you UK or USA?
[16:06:16] <DRGray> uk
[16:06:31] <robin_sz> 1050 is soft and works fine
[16:06:40] <robin_sz> 5083 is hard and works fine
[16:07:12] <DRGray> 6082 should anodise a bit thoguht
[16:07:20] <DRGray> it shouldnt just let the dye come off it
[16:07:22] <CaptHindsight> 6082 will anodize, it will just discolor
[16:08:20] <robin_sz> yep
[16:08:24] <DRGray> maybe ill just try and get these parts powerdercoated
[16:08:34] <robin_sz> is it magnesium in 6082?
[16:08:45] <robin_sz> or monganese/
[16:08:48] <robin_sz> whatever
[16:08:56] <robin_sz> chicken!
[16:09:41] <DRGray> i dont know
[16:09:43] <CaptHindsight> http://www.sapagroup.com/pages/522574/Brochures/Sapa%20Alloy%206082.pdf
[16:09:45] <DRGray> i want to anodise it
[16:10:13] <DRGray> This alloy also offers good finishing characteristics and responds
[16:10:14] <DRGray> well to anodizing
[16:10:35] <robin_sz> well, there you go
[16:10:45] <robin_sz> my neighbour is a Sapa rep ;)
[16:10:50] <DRGray> hah
[16:10:55] <CaptHindsight> slightly less than 6061, depending on temper
[16:11:07] <DRGray> the internet is full of dis information
[16:11:08] <robin_sz> 6061 .. sniff
[16:11:26] <robin_sz> you damn Americans and your 6061!
[16:11:39] * robin_sz looks irritated
[16:12:09] <robin_sz> have you any idea how much that costs over here in the UK and how cheap it is in the USA?
[16:12:48] <DRGray> i will go a bit mental if i cant anodise it
[16:12:52] <CaptHindsight> why are we worrying about this anyway when someone in the channel is desperately looking for a spindle motor and drive?
[16:13:07] <robin_sz> a sheet of 0.016 6061-T6 (12 x 4) is $80 in the USA
[16:13:15] <robin_sz> and about $450 in the UK
[16:13:30] * robin_sz cries slightly
[16:13:35] <CaptHindsight> is that due to the exchange rate?
[16:13:39] <robin_sz> no
[16:13:48] <robin_sz> both prices in dollars
[16:14:15] <CaptHindsight> does one include shipping?
[16:15:24] <CaptHindsight> VAT? willing to pay more? International treaty?
[16:15:32] <CaptHindsight> just because
[16:15:36] <gregcnc> are there any mills producing to 6061 spec in EU?
[16:25:36] <DRGray> crazy uk
[16:26:17] <DRGray> well… can a spindel chang colour>
[16:26:18] <DRGray> ?
[16:26:34] <DRGray> no
[16:26:50] <DRGray> dyeing things is fun
[16:32:21] <CaptHindsight> http://aluminumsurface.blogspot.com/2009/04/burning-and-powdering-two-problems-when.html
[16:35:47] <DRGray> reading it now
[16:36:03] <DRGray> hard though wine has got to me
[16:36:14] <Deejay> gn8
[16:36:40] <DRGray> its not burning
[17:12:38] <robin_sz> grr
[17:12:41] <robin_sz> poxy lapto
[17:13:22] <robin_sz> so, question: on the xhc pendant how can I increase the size of the jogs when I turneth the wheel?
[17:13:59] <robin_sz> the standard sequence of jog steps seems to be very very fine, really fine, and extremely fine
[17:15:08] <robin_sz> and who is the pncconf guy?
[17:42:17] <JT-Shopp> chris morley
[17:42:23] <JT-Shopp> on the forum
[17:50:19] <Crom> yay new usb keyboard showed up
[17:52:08] <_methods> it must be one awesome keyboard to get excited enough to announce it's arrival lol
[17:53:04] <Tom_itx> i'm kinda partial to the kind that if dropped on your toe would really hurt
[17:53:42] <_methods> i like my mechanical keyboards
[17:54:01] <_methods> i dont think anyone else in the vicinity likes them though
[17:54:25] <JT-Shop> I need some backlit ones for the beer cave... kinda dark down there
[17:54:25] <Tom_itx> mine isn't IBM but it's heavy
[17:54:46] <_methods> yeah i got one with led's for my man cave computer
[17:55:06] <JT-Shop> how do you like it?
[17:55:12] <_methods> i like it
[17:55:20] <_methods> i bought a cheap rosewill mechanical one
[17:55:24] <_methods> with led backlights
[17:55:58] <JT-Shop> I have to watch out sometimes they reverse the delete key and I'm forever trying to find it
[17:56:45] <JT-Shop> I like the layout of my logitech is has a double height delete key... it's my favorite key
[17:56:59] <Tom_itx> turned in my final for catia part design yesterday...
[17:57:01] <_methods> yeah my laptop has a tiny delete key and i can never seem to find it
[17:57:06] <JT-Shop> cool
[17:57:11] <Tom_itx> pretty sure i aced it
[17:57:14] <_methods> congrats
[17:57:25] <JT-Shop> you doing that for fun?
[17:57:28] <_methods> how'd your neighbor do?
[17:57:35] <Tom_itx> not as good
[17:57:38] <_methods> hahah
[17:57:44] <Tom_itx> yeah i'm doing it for fun for now
[17:58:30] <JT-Shop> I like to say I'm doing it because I can
[17:58:52] <Tom_itx> i wanna get to the point i can use the surface design and surface machining
[17:59:09] <_methods> yeah surface stuff is always more challenging
[17:59:09] <dgarr> robin_sz: [XHC_HB04_CONFIG]scales =1 1 1 1 , try 2 2 2 2 or 10 10 10 10 etc
[17:59:15] <_methods> real PITA at times
[17:59:20] <_methods> getting normals right
[17:59:21] <Tom_itx> later if somone came along and offered me something i might consider it
[17:59:23] <_methods> and stuff sealed up
[17:59:42] <_methods> if you deal with surfacing all day it's probably not so bad
[17:59:56] <_methods> but i usually only have to use it when doing something really annoying
[18:00:11] <Tom_itx> far as i can tell, catia handles them pretty good
[18:00:29] <Tom_itx> i'd open the surface packages up in my spare time and mess around a little
[18:00:52] <_methods> it can definitely be more tedious
[18:00:59] <JT-Shop> I have these two lines in my .axisrc file and now the X won't close the window root_window.tk.call("wm","geometry",".","1450x800")
[18:00:59] <JT-Shop> root_window.tk.call("wm","protocol",".","WM_DELETE_WINDOW","destroy")
[18:01:01] <_methods> there's a reason it moved to solid modeling
[18:01:04] <Tom_itx> then i'd ask the prof for help and he'd look at me kinda funny and smile when it wasn't class material
[18:01:05] <JT-Shop> must be doing something wrong
[18:01:12] <JT-Shop> hi dgarr
[18:02:04] <_methods> damn louisiana is getting blasted
[18:02:27] <JT-Shop> ouch, we are going to Houma next weekend
[18:02:41] <JT-Shop> they do have some good pumps in NO
[18:07:49] <robin_sz> dgarr, ah ha, OK, got it.
[18:09:32] <robin_sz> I did have one other error .. xhc tried to claim a pin that was already claimed by something else
[18:11:32] <robin_sz> I had to commetn out this in the regualr HAL file: net spindle-vel-cmd-rps-abs <= motion.spindle-speed-out-rps-abs
[18:12:28] <_methods> CaptHindsight: did you ever find pink nightmare a spindle and water cooling solutions
[18:34:16] <dgarr> JT-Shop: "destroy ." you omitted the dot above
[18:38:05] <robin_sz> CaptHindsight, and before my laptop crashed: its not an exchange rate thing so much as the importers making ridiculous profits
[19:08:06] <hatch789> hey guys would anyone know why I might be getting drift on my 7i43 board when it's powered up. With power off to my 7i43 board my servo's are nice and quiet and don't move one bit. As soon as I turn my 7i43 board on my servos start moving both X&Y at a slow constant speed.
[19:22:48] <andypugh> Is the encoder feedback changing?
[19:24:07] <hatch789> how would I know that Andy?
[19:25:23] <andypugh> Have a look with halmeter
[19:25:57] <hatch789> I was trying to do that the other day but didn't know what channels to view.
[19:27:08] <hatch789> I thought it would be the signal channel as that's really the only thing which controls the servers moving... right?
[19:29:04] <andypugh> Start by looking at axis.N.motor-position-fb, I supose.
[19:29:30] <andypugh> Other than the drift, do things move under control?
[19:30:07] <hatch789> yes and if I force power on with LinuxCNC then the servos stop but I can tell they're fighting (trying to move).
[19:30:36] <hatch789> but that's because of whatever has changed on the 7i43 board which is now making them want to move in a particular direction on their own
[19:31:00] <hatch789> so I didn't keep the linuxcnc power on more than a few seconds
[19:31:06] <hatch789> I didn't want to hurt my servos
[19:31:14] <andypugh> Are the drives enabled by the 7i43?
[19:31:42] <hatch789> servo drives are driven by a Westamp servo drive board
[19:32:10] <hatch789> it's working perfectly ...no noise or drift at all while the power is off to the 7i43
[19:32:18] <andypugh> If these are velocity mode servos then it’s quite normal for them to drift if the drives are powered up but the closed-loop feedback is disabled.
[19:32:30] <hatch789> as soon as I flip the switch to the 7i43 the servos start to move then. So this has to be the 7i43 doing something odd
[19:32:54] <hatch789> it's connected to a 7i49 resolver board and then a 7i42T board for limit switches
[19:33:20] <PCW> Check the 5V
[19:33:23] <andypugh> Is there any way to tell at what point the amps get enabled?
[19:34:13] <hatch789> you mean the signal that should be between -10 and +10v?
[19:34:54] <hatch789> my 5v power supply is an isolated supply. Do you mean to check that to make sure it's truly 5v?
[19:35:26] <PCW> Yes
[19:35:42] <hatch789> ok ...are you going to be on for a bit?
[19:35:54] <hatch789> I will check that
[19:36:33] <PCW> also, as Andy says, drift is expected in velocity mode servos if they are enabled but linuxcnc does not have the PID loop closed
[19:37:24] <hatch789> PID loop... why would that have come open where before it was not?
[19:39:06] <PCW> are the drives enables controlled by linuxcnc?
[19:40:30] <hatch789> I don't think so ...when I hit the RESET button on my machine the drives are powered on and the servo's power X & Y so I can no longer spin the hand controls ...this I can do to test drift on the servo motors BEFORE power is applied to the 7i43 board
[19:40:52] <hatch789> so they are at this point waiting only for a signal from the 7i43 (really 7i49) board
[19:41:11] <hatch789> anything +10v to -10v will send the servos moving
[19:41:42] <hatch789> so this constant slow movement seems like there is a small signal 1v or -1v on the 7i49 board now for some odd reason
[19:43:02] * Jymmm removes the 1.2V battery
[19:43:34] <hatch789> if I send you my .hal file would you be able to see which channel I need to look at in my hal meter to see if this is true?
[19:44:33] <_methods> Jymmm: stfu
[19:44:59] <_methods> i know u still have it attached to your small hands
[19:48:28] <andypugh> Time I stopped. Night all.
[19:51:57] <_methods> don't leave english patiente
[19:52:36] <PCW> You need to control the drive enables by linuxcnc otherwise your axis will always drift before
[19:52:37] <PCW> LinuxCNC is running or when linuxCNC is not in the machine-on state
[19:52:39] <PCW>
[19:54:25] * Jymmm pokes PCW with a stick... still breathing over there?
[19:54:39] <hatch789_> so when linuxcnc is not running the "signal" could be drifting
[19:54:45] <hatch789_> that's what you're saying?
[19:55:14] <_methods> i think, i drank way too much
[19:55:37] <Jymmm> ...cough syrup.
[19:55:38] <_methods> i'm lookin at harbor freight ads and they look reasonable
[19:56:06] <_methods> what's wrong with a harbor freight tig welder
[19:56:44] <Jymmm> _methods: you tell us
[19:56:57] <_methods> i don't know damnit
[19:56:58] <PCW> analog velocity servos are expected to drift, that's why they always have enables and why
[19:57:00] <PCW> the enables are only asserted when the PID loop is is control
[19:57:05] <_methods> that's why im asking
[19:57:19] <_methods> i need some jymm guidance
[19:57:32] <Jymmm> _methods: <--- GO THAT WAY -->
[19:57:47] <_methods> i'm comfortable with getting tazed
[19:57:49] <hatch789_> so I have linuxcnc on right now and the power button pressed
[19:57:50] <PCW> I should say that's one reason they always have enables
[19:58:18] <Jymmm> PCW: can the enables be brought lo when offline?
[19:59:07] <PCW> normally the are controlled by LinuxCNCs axis enablee signals
[20:00:00] <hatch789_> is there any way to tell right now if my "signal" is something other than 0?
[20:00:24] <PCW> it will_ALWAYS_ be something other than 0V
[20:00:46] <_methods> Jymmm: likes sardines
[20:01:43] <PCW> the point is that when LinuxCNC does not have the loop closed you MUST disable the drives
[20:01:44] <PCW> ( this is also a safety issue so that LinuxCNC can disable the drives in case of a following error )
[20:02:50] <_methods> Jymmm: is also a master in spider web crochet techniques
[20:06:37] * Jymmm thinks SOMEBODY needs to sleep it off (but we won't mention any names now will we _methods?)
[20:06:59] <_methods> lkjdflsaj;ldfja892389131
[20:08:24] <gregcnc> _methods your spindle frequency and voltage are a bit off
[20:09:24] <_methods> lies
[20:12:25] <_methods> should i use green or clear for coolant
[20:12:33] <Tom_itx> green
[20:12:45] <Tom_itx> so when the mold does grow it won't be so noticeable
[20:12:45] <_methods> should i drink it?
[20:13:13] <Tom_itx> do you need lubed?
[20:13:21] <_methods> yep
[20:13:25] <_methods> berrigs
[20:13:37] <malcom2073> Give it a couple months before you drink it
[20:13:44] <_methods> gotta have berrigs coollant
[20:13:45] <malcom2073> Then you'll get drunk
[20:13:48] <gregcnc> only if you plan on switching to krokodyl later
[20:14:52] <_methods> youwant some fingernail pics
[20:15:08] <_methods> so pink
[20:19:32] <Jymmm> LMAO, For you nail fetish ppl https://www.youtube.com/watch?v=btfLjIYw300
[20:19:51] <malcom2073> pink_vampire ^^
[20:21:55] <_methods> pink ratard
[20:22:47] <_methods> "she's" like zeeshoons sister
[20:30:44] <hatch789_> is there any way to see if I have a signal voltage coming out of my signal pins right now?
[20:30:53] <hatch789_> how can I identify which pins to watch with hal meter/
[20:33:47] <Jymmm> http://linuxcnc.org/docs/html/hal/tools.html
[20:34:08] <gregcnc> Jymmm do you know anything about thermoelectric generators?
[20:34:23] <Jymmm> gregcnc: tcoolers? a lil
[20:35:04] <Jymmm> gregcnc: What you trying to do?
[20:35:35] <gregcnc> generate ~10W@ ~10V from exhaust heat
[20:35:49] <Jymmm> car exhaust?
[20:35:54] <gregcnc> small engine
[20:36:03] <_methods> 110v
[20:36:13] <_methods> tha's all they have in nyc
[20:36:15] <Jymmm> gregcnc: driving what?
[20:36:45] <gregcnc> charge battery through a regulator to 7.2V or 8.4V
[20:37:03] <Jymmm> 7.2 so lithium?
[20:37:12] <PCW> When LinuxCNC is not in the running state, PID should be disabled so the commanded output voltage (the hal pin) will be 0
[20:37:13] <PCW> the actual output voltage will have some small amount of offset (as will the drives)
[20:37:20] <gregcnc> LiIon or LiFe
[20:37:41] <Jymmm> gregcnc: is the engine stationary?
[20:38:05] <gregcnc> no so much
[20:38:39] <Jymmm> gregcnc: will it stay runninf CONTONOUSLY for at least 60 minutes or how ever long it takes to complete a FULL charge?
[20:39:18] <gregcnc> it will start fully charged and basically just keep up with current demands
[20:39:40] <Jymmm> gregcnc: so you are trying to "top it off" so to speak?
[20:40:07] <gregcnc> similar to what happens after you start your car
[20:40:54] <gregcnc> if they say the module is 6% and i want 10W I need to dump 170W on the cool side?
[20:41:22] <SpeedEvil> yes
[20:41:28] <Jymmm> gregcnc: Ok, the issues with Lithium is they are in "charge cycles", you only get 500 or so. It's best to always do a FULL charge, and not keep recharging it 8 times in a day. It kills the overall life of the battery.
[20:41:38] <SpeedEvil> Jymmm: that's not true
[20:41:49] <SpeedEvil> 'cycles' in that case are integrated total cycles
[20:41:51] <gregcnc> i dont' care one time use
[20:41:59] <SpeedEvil> half doubles the cycle count
[20:42:12] <SpeedEvil> Also - having low peak charge voltage helps a lot with degradation
[20:42:25] <SpeedEvil> If you only ever charge to 80%, it lasts enormously longer
[20:42:26] <Jymmm> gregcnc: ah ok, so just make sure you have a large thermal differenccial
[20:43:03] <gregcnc> that's a substantial heat sink a small generator is probably much smaller/lighter
[20:43:41] <Jymmm> gregcnc: It depends on ambiant temp, if it's in 101F temp might be a pita
[20:44:04] <Jymmm> gregcnc: what is the engine driving?
[20:44:16] <pink_vampire> hi
[20:44:36] <pink_vampire> I did dome test to the Z axis on my machine,
[20:44:50] <Jymmm> gregcnc: chainsaw? mower? gokart?
[20:44:51] <gregcnc> if it was in water it would be a no brainer but this thing will fly
[20:45:33] <gregcnc> I'll do the math on the heatsink i have 25 m/s airflow
[20:45:33] <pink_vampire> and I have a gap between on the rail.
[20:45:39] <pink_vampire> about 0.1 mm
[20:45:57] <Jymmm> gregcnc: what is the engine driving?
[20:46:02] <gregcnc> prop
[20:46:08] <Jymmm> drone?
[20:46:14] <pink_vampire> if I push the spindle down I get the gap on the top.
[20:46:19] <gregcnc> pshh model airplane
[20:46:48] <pink_vampire> and I did lapping to the Z axis.
[20:46:58] <Jymmm> gregcnc: so you trying to recharge the electonics battery mid-flight?
[20:47:18] <SpeedEvil> In daytime, thin film solar cells might help more
[20:47:36] <gregcnc> I've built generators, but this seemed liek it may work
[20:47:41] <pink_vampire> and is I'm closing the gib more it's make the rail unusable.
[20:47:49] <pink_vampire> someone?
[20:48:06] <Jymmm> gregcnc: on a plane, it's probably doable with the right heatsink profile, but will it draw away too much heat from the engine?
[20:48:28] <SpeedEvil> Jymmm: not if it's on the exhaust
[20:48:37] <gregcnc> no, the engine has kW in cooling load
[20:49:14] <pink_vampire> is there a way to correct it??
[20:49:34] <gregcnc> but i was going to isolate the exhaust so the the didn't vibrate to pieces
[20:50:19] <gregcnc> if the heat sink isn't crazy big it's worth a try
[20:50:30] <pink_vampire> ???????????
[20:51:18] <pink_vampire> if *
[20:51:47] <Jymmm> gregcnc: super thin fins, sorta kinda http://archive.benchmarkreviews.com/images/reviews/cooling/Super-Mega/ProlimaTech-Super-Mega-Heatsink-Heatpipes.jpg
[20:52:02] <Jymmm> gregcnc: cut down of course
[20:52:50] <Jymmm> gregcnc: Maybe like this cut in half http://www.lfm-zerspanungstechnik.de/s/cc_images/cache_52521989.jpg
[20:53:05] <Jymmm> assuming that wouldn't muck up the aerodynaics too much
[20:53:56] <pink_vampire> is there a way to calibrate the machine?
[20:54:08] <gregcnc> a lot of drag wouldn't help I'll do the math in the morning
[20:54:22] <Jymmm> gregcnc: OOOOOH kinda like this http://thermocoolcorp.com/wp-content/uploads/2014/10/Copper-Base-Bonded-Fin-heatsink.png
[20:54:49] <gregcnc> now that could be efficient
[20:54:53] <Jymmm> w/o the copper base though
[20:55:02] <Jymmm> or a thin base
[20:55:28] <Jymmm> gregcnc: http://thermocoolcorp.com/project/bonded-fins/
[20:55:41] <Jymmm> gregcnc: Call and ask for samples =)
[20:56:23] <gregcnc> ooh i might try
[20:56:28] <Jymmm> gregcnc: they have HEATPIPES!!!!
[20:56:59] <pink_vampire> i'm thinking they this is what causing problem and give me poor finish, because if I have the wobble on the dovetail of the Z axis instead of cutting smooth it's push the spindle and give poor cutting.
[20:57:28] <pink_vampire> that*
[20:57:56] <pink_vampire> so even with high speed spindle I will get poor results
[20:58:18] <pink_vampire> what do you think?
[20:59:28] <toastyde1th> pink_vampire, i'd disassemble the dovetail and measure the gib
[20:59:46] <toastyde1th> if the gib is bowed, or thicker in the center, you're fucked
[20:59:58] <pink_vampire> what do you mean?
[21:00:06] <pink_vampire> with the caliper?
[21:00:12] <toastyde1th> a caliper will work
[21:00:19] <toastyde1th> it's a better idea to use a micrometer in this instance
[21:00:33] <pink_vampire> I don't have micrometer.
[21:00:40] <toastyde1th> gibs are very sensitive to geometric errors
[21:01:02] <pink_vampire> but the gib is tapered.
[21:01:10] <toastyde1th> it needs to be a constant taper
[21:01:21] <toastyde1th> because it mates up to a mirrored taper on the slide
[21:01:32] <toastyde1th> so you can check it
[21:01:39] <pink_vampire> how?
[21:01:49] <toastyde1th> make marks every inch or so and take a measurement
[21:02:02] <toastyde1th> half inch, if necessary
[21:02:20] <toastyde1th> the increase between every mark should be identical
[21:02:24] <pink_vampire> against what to measure it?
[21:02:36] <toastyde1th> itself? you're measuring the thickness at inch or half inch intervals
[21:02:44] <toastyde1th> and then calculating the taper
[21:03:45] <toastyde1th> line one side of the fixed jaw up with your inch mark on the non-tapered side (just pick a side and call it "not the taper side")
[21:03:46] <pink_vampire> and if it's good and the problem is in the rails?
[21:03:52] <toastyde1th> and then close the moving jaw down on it
[21:04:04] <toastyde1th> that way even though you're not getting full contact you get a repeatable measurement
[21:04:12] <toastyde1th> do it a few times to get an idea of your variablity
[21:04:17] <toastyde1th> it could be the rails, yeah
[21:04:38] <toastyde1th> it could be many things, you have to get into the slide to figure out what the problem might be
[21:04:42] <toastyde1th> but gib is usually a good place to start
[21:04:50] <pink_vampire> bacause the gib look very good.
[21:05:09] <pink_vampire> but the gap change as I move the Z axis.
[21:05:09] <toastyde1th> you have no way of eyeballing any of this, so i would recommend not making those assessments until you measure
[21:05:25] <pink_vampire> so I'm thinking is the rails.
[21:05:40] <toastyde1th> you can rough check rails and other things with a good straightedge
[21:05:47] <toastyde1th> like a decent machinist's square
[21:06:36] <pink_vampire> how do you check the dovetail itself?
[21:07:32] <pink_vampire> and how I can know that it's parallel?
[21:07:43] <toastyde1th> you probably do not have the gear to do that
[21:07:50] <toastyde1th> and building it takes quite a bit of knowhow
[21:08:17] <pink_vampire> do you know who can do it for me?
[21:08:19] <toastyde1th> the only thing you'll be able to do is take a straightedge and move it along to see if there's changing gaps along the length of the dovetail
[21:08:32] <toastyde1th> not anymore and I'm nowhere near them, and they are very expensive
[21:09:26] <pink_vampire> how much something like that will cost?
[21:09:40] <toastyde1th> 1500-2000 for a small machine
[21:09:54] <toastyde1th> to check and correct
[21:10:21] <pink_vampire> I need just one axis
[21:10:25] <toastyde1th> yep
[21:10:45] <toastyde1th> it would cost more for more axes, but not triple the cost
[21:11:01] <toastyde1th> once you start disassembling the machine it doesn't take a ton more work to disassemble the rest of it
[21:12:00] <pink_vampire> I'm trying to see now
[21:12:07] <toastyde1th> that's why it's hard to get decent machine tools, even small ones, that cost less than 8-10k
[21:12:21] <toastyde1th> because if you try to check it, it's a lot more work than just making the thing and hoping it's okay
[21:14:12] <pink_vampire> I just want it calibrate and hand scraped professionally
[21:14:23] <toastyde1th> if you want it hand scraped it's gonna cost more than 2k, easy
[21:14:40] <toastyde1th> only the most expensive machine tools get hand scraped nowdays, whether new or used
[21:14:59] <toastyde1th> even for a single axis
[21:15:12] <toastyde1th> it's much cheaper and easier to just have someone regrind it
[21:15:29] <toastyde1th> and it's going to be beyond your ability to notice in terms of accuracy and bearing performance
[21:15:39] <pink_vampire> but how you re make the dovetail?
[21:16:21] <toastyde1th> you draw the dovetail, make some copies of it, and then start taking some initial measurements to figure out where and how much material to remove
[21:16:39] <toastyde1th> throw it on the grinder, line it up according to the measurements, and then take passes
[21:17:46] <toastyde1th> once the dovetail is done, measure the slide and start the same process until it's geometrically accurate. then you spot the slide against the dovetail and make the necessary changes
[21:18:09] <toastyde1th> once that's done, you measure the gap between the slide and dovetail and make a new gib.
[21:18:37] <toastyde1th> then you can stop, or you can keep going.
[21:18:39] <pink_vampire> but the whole machine cost 1K
[21:18:48] <toastyde1th> ...so?
[21:19:09] <pink_vampire> soo to re grind it cost more then 2 times?
[21:19:10] <toastyde1th> if you got the machine for free that doesn't change how much work it takes to fix
[21:19:38] <toastyde1th> this is also why inexpensive machines are not made this way, and is why they have problems like the one you're describing
[21:19:41] <pink_vampire> is 1K brand new
[21:19:45] <toastyde1th> the parts are mass manufactred to close enough, and shipped
[21:20:00] <toastyde1th> that way they don't incur the cost of making the slide accurate
[21:20:42] <toastyde1th> something isn't right geometrically? tough
[21:20:53] <toastyde1th> that's the only way you can make a machine tool and sell it for that price
[21:20:57] <pink_vampire> it's the G0704.
[21:21:14] <toastyde1th> k?
[21:21:40] <pink_vampire> it's ok.. not high precision machine
[21:21:59] <toastyde1th> sure, i'm not saying it is or has to be
[21:22:19] <toastyde1th> i'm just explaining why these problems exist on brand new machines, and that fixing/manufacturing it to a higher standard will make the machine cost several times as much
[21:24:36] <toastyde1th> you can learn to do it yourself but you'll need a bunch of gear
[21:24:48] <toastyde1th> it sorta helps to have a milling machine and lathe that work
[21:25:46] <pink_vampire> do you think 300$ for the Z axis
[21:26:04] <pink_vampire> it's too cheap?
[21:26:04] <toastyde1th> 300 for what
[21:26:24] <toastyde1th> nobody is even going to look at your machine at a distance for 300 bucks
[21:26:24] <pink_vampire> scraping
[21:26:26] <toastyde1th> sorry
[21:26:57] <pink_vampire> :(
[21:27:05] <pink_vampire> but she is cute
[21:29:59] <toastyde1th> the other bad thing about fixing small machines is they require a lot of custom tooling to fix
[21:30:04] <toastyde1th> because the slides are so small
[21:30:35] <toastyde1th> most of the shit a scrapehand would use off the shelf doesn't fit on slides much smaller than what a bridgeport has
[21:31:35] <toastyde1th> so you wind up spending just as much time on a small machine disassembling it as a larger one, then you have to figure out what kind of tooling would fit, make it, and then hope it works
[21:32:12] <pink_vampire> do you know any in NY NJ PA?
[21:32:33] <toastyde1th> yes but they don't work on small machines at all
[21:32:36] <toastyde1th> as in, will not take the work
[21:32:55] <toastyde1th> they only work on large machine tools - 40" tables and up or thereabouts
[21:33:29] <pink_vampire> but alot of thing get scraped not just machines.
[21:34:45] <toastyde1th> ...so?
[21:34:53] <toastyde1th> they only work on large machine tools - that's their business model
[21:35:06] <toastyde1th> i don't know of every company that does scraping, only the people I worked around
[21:35:54] <pink_vampire> bet even if I find someone
[21:36:09] <pink_vampire> how I know if it will make good work?
[21:37:34] <toastyde1th> you need to put this idea out of your head because you are not prepared to pay what the service costs
[21:38:37] <pink_vampire> but if I will get it very precise it will be worth it
[21:39:02] <SpeedEvil> fixing one thing about a cheap machine does not make it as accurate as an expensive machine
[21:39:34] <pink_vampire> why?
[21:39:56] <SpeedEvil> because there are multiple things wrong with the cheap machine.
[21:40:05] <SpeedEvil> From design, to construction.
[21:41:05] <pink_vampire> but after the scraping it will be muchhh more accurate
[21:41:25] <pink_vampire> now I have gap of 0.1mm on the Z axis
[21:42:08] <toastyde1th> yes but you don't seem believe how expensive scraping is
[21:42:23] <toastyde1th> it would be cheaper to go buy a better machine instead of scraping the one you have
[21:42:34] <pink_vampire> so grinding..
[21:42:41] <CaptHindsight> _methods: I put out a CNC APB for heads to be put together even in the remotest areas of China for a 110V NY solution.
[21:42:45] <witnit> the only reason to ever have a low quality machine scraped is so you can learn how to scrape
[21:43:55] <pink_vampire> but I don't have to tools for that or the place for the tools to make it happen :(
[21:44:26] <CaptHindsight> _methods: I hope that the finest minds from Prague to Nanjing and Helsinki to Cape Town will find something.
[21:49:10] <CaptHindsight> _methods: in 24 hours we'll either have an answer or death by chocolate
[21:58:07] <SpeedEvil> learning to scrape can use quite modest tools
[22:10:23] <pink_vampire> SpeedEvil: I know the basic is you need surface plate bigger then the object that you want to scrape
[22:11:18] <pink_vampire> the Z axis is 29" by 5"
[22:14:37] <pink_vampire> so I need something like that
[22:14:38] <pink_vampire> http://www.grizzly.com/products/24-x-36-x-4-Granite-Surface-Plate-2-Ledges/G9657
[22:20:45] <pink_vampire> Weighs 399 lbs
[22:20:45] <pink_vampire> how I can even move it to my apartment in wood house on second floor?
[22:20:45] <pink_vampire> SpeedEvil: ^
[22:39:19] <Crom> ratchet straps to pull it up the stairs
[22:40:16] <malcom2073> Buy a comealong
[22:40:19] <Crom> floor should be rated for that load...
[22:40:22] <malcom2073> Much easier than ratchet straps, I've done both :-D
[22:40:31] <Crom> malcom2073, true
[23:10:53] <SpeedEvil> pink_vampire: teleportation
[23:11:27] <SpeedEvil> Also - why do you actually need that size of surface plate
[23:12:02] <OdinYggd> 3 people team lift
[23:12:22] <SpeedEvil> four might be more secure
[23:12:41] <SpeedEvil> you do not ever want to get into the position that one person tripping can fuck you up
[23:13:25] <CaptHindsight> 400lbs raised 20ft
[23:14:17] <SpeedEvil> https://i.ytimg.com/vi/FSrcMaid0mg/hqdefault.jpg - problem solved
[23:17:32] <CaptHindsight> i was thinking more this way http://www.tampabay.com/resources/images/dti/rendered/2012/05/B4S_jet050912a_221572a_8col.jpg
[23:17:34] <malcom2073> "you bitch!"
[23:19:16] <CaptHindsight> or maybe https://upload.wikimedia.org/wikipedia/commons/c/cb/Replica_catapult.jpg
[23:23:25] <witnit> I remember buying my starrett surface plate, I looked at the guy and was like, how much you want for this rock? he said $10 I was pleased
[23:23:41] <CaptHindsight> 8k ft lbs = ~11kJ
[23:24:46] <CaptHindsight> = ton of TNT 0.000002592
[23:27:22] <CaptHindsight> so it won't take much TNT to launch it up 20ft
[23:33:09] <SpeedEvil> It is also the amount of energy in an AA battery
[23:33:24] <SpeedEvil> Engineering details remain
[23:35:29] <pink_vampire> I have crazy idea..
[23:36:06] <roycroft> i got a starrett 12x18 inspection grade surface plate for $30
[23:36:14] <roycroft> it is that pink granite that they like to use
[23:36:26] <pink_vampire> the Z axis is 29"
[23:36:33] <roycroft> i literally got it from a guy in a parking lot who had it in a suitcase in the trunk of his car
[23:36:50] <roycroft> my main surface plate is a grizzly 18x24
[23:37:19] <pink_vampire> roycroft: how do you scrape the dovetail rails?
[23:37:32] <CaptHindsight> https://hallomevrouwclark.files.wordpress.com/2011/09/amsterdam-weekend-080.jpg + rope and 2 minutes of time by the truck delivering the surface plate
[23:38:00] <pink_vampire> CaptHindsight:
[23:38:26] <pink_vampire> the table of the machine is 26.5
[23:39:07] <pink_vampire> but the moving part on the Z axis run only on 25.5"
[23:39:30] <CaptHindsight> https://youtu.be/rDMMYT3vkTk?t=1m8s might also work and you could sell tickets to the event
[23:39:42] <pink_vampire> so maybe I can use the machine table as my surface plate.
[23:40:56] <pink_vampire> roycroft: what do you think?
[23:55:19] <witnit> CaptHindsight: such grace such form