#linuxcnc | Logs for 2016-06-02

[01:58:06] <tiwake> meh
[01:59:02] <tiwake> trying to create a rectangle cube thing, and on either end taper down to a point at 45 degrees until all the edges meet
[02:28:49] <toastydeath> so an octahedron?
[02:35:34] <Deejay> moin
[03:31:57] <pink_vampire> hi.
[03:33:12] <pink_vampire> do you think that I can use the dremel fiber disc on the machine as slitting saw.. I mean to rotate it in 1000 rpm.
[03:43:31] <archivist> far too slow
[03:44:42] <archivist> just get the real thing, a slitting saw and arbour
[04:08:29] <enleth> pink_vampire: the slowest speed of most dremel-like tools is 15k
[04:08:47] <enleth> and those discs like higher speeds
[04:09:10] <enleth> (not the max though, they tend to explode at over 25k)
[04:09:45] <pink_vampire> I need something for cutting small stuff very accurate
[04:10:30] <enleth> slitting saws
[04:10:35] <archivist> I use steel slitting saws
[04:11:17] <archivist> dremel cutting discs are terrible in comparison
[04:11:52] <archivist> I think my thinnest is 12 thou
[04:13:44] <archivist> I make the arbours to suit
[04:35:06] <pink_vampire> mm
[04:35:08] <pink_vampire> ok..
[04:46:21] <XXCoder> heys
[04:46:42] <pink_vampire> hi XXCoder
[04:46:47] <XXCoder> another option: mount dermel on spindle
[04:46:55] <XXCoder> spindle dont spin, just move it around
[04:48:57] <archivist> cut off blades wear at a rate you cannot drive into work
[04:51:14] <Sync> hm, I wonder how one would implement constrant dressing like some grinding machines do
[04:52:46] <XXCoder> magic
[04:52:47] <XXCoder> heh
[04:56:23] <archivist> we had a user in here use something like the torch height to take grinding wheel wear into account on a marble edge grinding machine
[04:57:21] <XXCoder> one fancy machine at work uses laser to check size
[04:57:34] <XXCoder> its for tools but im sure something like it can be made for grinder
[04:59:05] <pink_vampire> I want a machine that run like that https://youtu.be/NnRVmiqm84k
[05:13:38] <Sync> well, they usually run a dressing wheel constantly
[05:13:51] <Sync> yeah something like that archivist
[05:15:25] <XXCoder> heh tried avon bottle water for hell of it
[05:15:30] <XXCoder> never again ugh
[05:19:48] <latheguy> Hey! I'm back
[05:20:12] <pink_vampire> cnc make chips + good music in full volume + me dancing = very good combination
[05:20:45] <latheguy> I've got a quick question: what are "positional parameters"
[05:20:46] <latheguy> ?
[05:21:00] <latheguy> I'm reading the remapping guide on the Docs.
[05:21:33] <latheguy> there says that argspec can specify positional parameters when '@' sign follows a letter
[05:24:58] <XXCoder> pink_vampire: there is people using motors to make music
[05:25:18] <XXCoder> pink https://www.youtube.com/watch?v=cM_sAxrAu7Q
[05:29:17] <pink_vampire> I know,,
[09:14:01] <Polymorphism> frame arrives today
[09:14:23] <Polymorphism> hopefully will give me a better idea of how much wire I need to order
[09:14:31] <Polymorphism> I am tempted by this ebay wire for $20 or so
[09:14:36] <Polymorphism> 18/4 stranded
[09:15:05] <Polymorphism> but after seeing that igus... can this cheap stuff handle the flexing and motion of the cnc, will I have problems with interference...
[09:15:45] <archivist> wire snaps if the bend is tight
[09:16:53] <enleth> Polymorphism: use spiral cable wraps and lay out wide loops, that will prevent tight bends
[09:17:09] <archivist> interference is about screening, grounding and proper wiring, not thickness of wires
[09:17:32] <enleth> Polymorphism: laid out properly, even very shitty wire will last decades
[09:17:58] <Polymorphism> ok
[09:18:36] <Polymorphism> if I can't manage to get beyond this temptation to buy the igus, it would be totally pointless for the limits right? I was going to just use cheap wire for those either way, some 22/2 perhaps from ebay
[09:18:51] <enleth> it would, yes
[09:19:17] <enleth> and even the best wire won't survive bad layout and tight bending
[09:19:17] <Polymorphism> alright
[09:19:30] <Polymorphism> I'll keep that in mind as I plan this out
[09:30:04] <archivist> we used ribbon cable before we learned our lesson, it lasted about an hour driving the head solenoids
[09:31:23] <archivist> fault was bend radius and cable type, we bought gore pcb type ribbon fixed the radius, never had another failure
[09:48:02] <archivist> genuine junk http://www.ebay.co.uk/itm/Wizard-Mini-Modelling-Lathe-Spares-Or-Repairs-Vintage-Antique-/222132477788
[09:57:58] <enleth> in case you ever need to machine gnat's ass hair
[10:01:12] <SpeedEvil> I wish I'd saved the pictures from ebay of that lovely monarch ee, with a bananna for scale.
[10:01:17] <SpeedEvil> The bananna was about as long as it
[10:01:43] <SpeedEvil> http://www.ebay.com/itm/Metal-Lathe-mini-ManSon-restored-antique-micro-Monarch-10EE-jewelers-watch-/231414756807 - pics are dead
[10:09:01] <_methods> http://www.craftsmanshipmuseum.com/Jordan.htm
[10:09:05] <_methods> like that lol
[10:10:27] <SpeedEvil> yeah
[10:10:50] <SpeedEvil> http://www.f1-2000.co.uk/ - sigh
[10:10:58] <SpeedEvil> Latest update 2012
[10:13:34] <_methods> is this it?
[10:13:35] <_methods> http://i52.photobucket.com/albums/g8/lvanice/PM/ManSon2.jpg
[10:24:50] <archivist> _methods, I talked to that guy at a show
[10:25:42] <_methods> amazing the detail they put into those things
[10:27:34] <archivist> his models are well worth seeing in the flesh
[10:29:04] <_methods> even the pics are insane i can only imagine seeing them
[10:35:01] <SpeedEvil> _methods: that looks familiar
[10:38:15] <pink_vampire> hi
[10:39:07] <pink_vampire> it is good or bad to cut the power of the servo motor from the dc side?
[10:39:19] <gregcnc> some people make small parts https://www.instagram.com/p/BF9-3dGq2_9/
[10:42:34] <enleth> is that, what, an MT0000 taper?
[10:45:26] <_methods> that's a chip
[10:45:28] <_methods> lol
[10:51:59] <archivist> work holding is the main challenge apart from seeing the part while working on it
[10:53:15] <CaptHindsight> childrens hands are usually smaller and better at holding small parts
[10:53:35] <gregcnc> https://www.instagram.com/p/BBX2YA9q22L/
[10:55:09] <gregcnc> seems like the hard way to make those
[10:56:00] <gregcnc> oh he has a tsugami swiss
[10:57:04] <archivist> stereo zoom microscope is easier than a loupe on a lathe
[11:28:42] <Frank_3> guys, normally what would give power to the servo driver and motor? the software controller? the panasonic servo manual says "Be sure not to use the electromagnetic contactor installed on the main power supply to start or stop
[11:28:43] <Frank_3> the motor"
[11:32:41] <archivist> let the control stop the motor
[11:34:03] <Frank_3> ok, but how should i power on the hole electric box? rotary switch giving power to everything?
[11:35:44] <Frank_3> crap, i got confused, it says do not use electromagnetic contactor to power on and off the motor, meaning do not put a contactor after the drive, but before the drive should be okey am i wrong?
[11:39:16] <skunkworks> that is how we have our conversions setup with amc and yaskawa drives.. The action of pulling out the estop in linuxcnc pulls in the contactors that power the servo drives.
[11:52:28] <maxcnc> hi from a desaster preparing Germany
[11:53:35] <maxcnc> fire service telling to be prepared for 60+ liters in short time
[11:55:32] <maxcnc> Polymorphism: still on
[11:55:37] <Frank_3> tahnks skunkworks, dont know if ur still ther
[11:56:11] <maxcnc> Frank_3: yaskawa is real cool stuff
[11:56:21] <Frank_3> im with panasonics
[11:56:23] <Frank_3> :D
[11:56:31] <maxcnc> using for camera systems in long time motion
[12:02:33] <jdh> liters of what?
[12:07:37] <_methods> sprockets
[12:07:48] <maxcnc> yes ofcause thats near 2inch an hour
[12:09:11] <_methods> https://www.youtube.com/watch?v=QHZR9SA5pOg
[12:10:02] <_methods> liters and liters of sprockets
[12:11:58] <gregcnc> liters per square meter of rainfall or mm/m^2
[12:13:08] <gregcnc> first thought's was bier, but who would complain about 60L of bier
[12:25:32] <maxcnc> oh beer you need lots of friends to deal with that amount in an hour
[12:40:42] <maxcnc> ok im closing down here will be a hard Day tomorrow ,Hoping not
[12:41:02] <maxcnc> keep your fingers crossed for me
[12:41:36] <maxcnc> the small river is less then 2m away from the shop
[12:42:04] <maxcnc> BYE
[13:46:26] <pink_vampire> http://i.imgur.com/dF9JmOw.jpg
[13:53:45] <Deejay> nice
[14:01:48] <pink_vampire> no no
[14:01:55] <pink_vampire> that nice http://i.imgur.com/M4usYSW.png
[14:02:03] <pink_vampire> Deejay: ^
[14:02:23] <Deejay> no.. that iss crazy
[14:02:34] <Deejay> -s
[14:02:37] <pink_vampire> no I loveee them.
[14:02:52] <Deejay> definitely too long
[14:03:05] <pink_vampire> so..
[14:04:50] <pink_vampire> Deejay: what to do?
[14:06:10] <Deejay> use grinder with nails ;)
[14:06:26] <pink_vampire> I can't
[14:35:54] <JT-Shop> dang need to get this blast cabinet chute done and out of my way http://gnipsel.com/images/blast-cabinet/Blast%20Cabinet%2006.JPG
[14:36:47] <Deejay> wow
[14:37:38] <Spida> JT-Shop: what is that intended to do?
[14:38:16] <JT-Shop> blast cabinet
[14:38:19] <JT-Shop> that's the bottom
[14:38:31] <JT-Shop> making the legs now
[15:07:39] * JT-Shop still can't get i2c to work on a nano
[16:00:02] <jdh> nanoo nanoo
[16:15:14] <_methods> shazbot
[16:23:09] <andypugh> Yay! New Clickspring: https://www.youtube.com/watch?v=VlvcjrelL7I
[16:25:36] <cradek> wow that hairspring is badly centered
[16:26:30] <andypugh> pretty sure that’t not his
[16:26:41] <cradek> no :-)
[16:27:06] <Deejay> gn8
[16:28:52] <andypugh> TBH I think he is being a bit daft in this video, a decent 3-jaw chuck would have done the whole job.
[16:30:29] <SpeedEvil> I think part of the point is fixturing on limited equipment.
[16:30:38] <SpeedEvil> That is quite a basic lathe he has.
[16:30:55] <cradek> I use superglue and acetone like that a *lot*
[16:31:02] <cradek> it's really useful
[16:32:01] <andypugh> I like his frequent use of hand gravers. I used that to make some brass dome-nuts recently (on a manual lathe(
[16:33:51] <cradek> interesting that he makes no attempt at temperature compensation
[16:34:17] <andypugh> I dare you to suggest a gridiron pendulum in the comments.
[16:34:20] <SpeedEvil> maybe the string has an opposite coefficient of expansion
[16:34:40] <cradek> aside from not being a troll, I have no way of commenting on youtube videos
[16:34:58] <cradek> besides, all you need is a simple jar of mercury :-)
[16:35:08] <Frank_3> cool channel, first time i've seen it
[16:35:20] <SpeedEvil> Brass is 19ppm/C or so.
[16:35:35] <SpeedEvil> a second a day is 10ppm
[16:36:13] <andypugh> Frank_3: His quality of production is excellent
[16:36:19] <SpeedEvil> I am unsure how accurate such a clock is going to be even in the face of no temperature variation
[16:36:42] <cradek> everything is finished so beautifully
[16:36:46] <SpeedEvil> He is actually a shill for the brass council.
[16:36:59] <Frank_3> and he sounds NOT old lol
[16:37:06] <andypugh> Brass is very under-used nowadays.
[16:37:13] <SpeedEvil> yeah
[16:37:27] <cradek> string!?
[16:37:39] <andypugh> Often the savings on machining time make brass a great choice. And it’s stronger than mild steel.
[16:37:40] <SpeedEvil> I guess it's considerably more expensive than steel and aluminium
[16:38:00] <SpeedEvil> cradek: yes, it has string holding the pendulumn up.
[16:38:13] <andypugh> cradek: Silk string
[16:38:25] <Frank_3> brass is stronger than mild steel?
[16:38:34] <andypugh> Yes
[16:38:35] <Frank_3> wow
[16:38:53] <Hydrar> Seems pretty easy to mill too from what I've seen
[16:38:54] <SpeedEvil> hence why brazing can be awesome
[16:39:11] <cradek> nice knurl
[16:39:15] <Hydrar> Actually had more issues with delrin because of the high-rpm router spindle than brass
[16:40:10] <andypugh> Well, some brasses and some steels.
[16:43:17] <Frank_3> is it ok to use 1 contactor for 4 servo motors?
[16:44:09] <andypugh> Why not?
[16:44:37] <andypugh> One of his most interesting videos is: https://www.youtube.com/watch?v=qpy5O0b7cL8
[16:45:24] <Hydrar> It's just fine to use a single main contactor as long as it can handle the full load current
[16:45:47] <andypugh> When you realise that you can buy photoresist in rolls, all sorts of possibilities come to mind.
[16:48:12] <SpeedEvil> yeah
[16:48:36] <SpeedEvil> I mean - yes - you can just laser-print a dial and get functionally identical, but...
[16:51:54] <Frank_3> reminds myself developing pictures in the lab
[16:53:41] <andypugh> I spent a solid month in the darkroom preparing the micrographs for my thesis.
[16:53:49] <andypugh> I was concerned about rickets :-)
[16:54:21] <FloppyDisk> The clock maker is awesome. thanks for sharing.
[16:55:23] <Frank_3> hhehe, i dont know the kind of lighting you had in there but my eyes liked to complain
[16:56:06] <andypugh> It was all balck-and-white, so red light was fine after the negs were in the bucket.
[16:56:25] <andypugh> (All Ye Olde 120 roll film, too)
[16:59:08] <Frank_3> wonder what he does with the clock, and the stuff he makes after building it
[16:59:24] <andypugh> He gives away some of the stuff
[17:01:00] <Frank_3> niiceee
[17:03:10] <andypugh> If you like watching folk with funny accents making timepieces, you might like this:
[17:03:11] <andypugh> https://www.youtube.com/watch?v=LBiiDpexmA8
[17:03:54] <andypugh> He’s one of the very few people in the world can make all of a watch, and charges accordingly.
[17:07:28] <Frank_3> holy $%$" 2 years to make 1 watch
[17:08:16] <andypugh> £100k suddenly sounds reasonable doesn’t it?
[17:08:52] <Frank_3> actually,
[17:08:53] <Frank_3> a lot
[17:08:58] <Frank_3> reasonably
[17:09:14] <Frank_3> yeah my english is bad
[17:09:15] <Frank_3> hehe
[17:10:15] <Frank_3> wonder how much of that is on materials
[17:11:32] <SpeedEvil> 0
[17:11:39] <SpeedEvil> To within rounding errors.
[17:11:51] <andypugh> The dial is silver..
[17:12:04] <SpeedEvil> Silver is $1000/kg or so
[17:12:22] <SpeedEvil> $600 even
[17:13:40] <SpeedEvil> I was looking at a glider, and was looking for a comparator for its weight, and silver was about it
[17:14:01] <Frank_3> hold my beer, ill make you one guys
[17:18:23] <SpeedEvil> http://imgur.com/gallery/5nDPdT8 - One pound a gram glider.
[17:24:43] <robin_sz> evening ...
[17:25:32] <robin_sz> back from sunny Los Angelese
[17:26:00] <robin_sz> andypugh, can I blame my cars lack of go on you please?
[17:26:12] <robin_sz> P010F
[17:26:39] <andypugh> You mean DW10F?
[17:33:53] <robin_sz> fault code P010F .. its something about "mass air A/B imbalance" or something equally bizarre
[17:34:09] <robin_sz> I see myself spending tomorrow with the bonnet up
[17:34:31] <andypugh> Ah, MAF plausibility. Probabably the boost pipe has popped off.
[17:35:09] <andypugh> Check the boost-air pipe from the turbo to the intercooler.
[17:36:24] <robin_sz> okies, I figured it would be a leak of some sort
[17:36:47] <robin_sz> although I can see the manifold pressure increases when I reve it
[17:37:13] <andypugh> Where do you see that? What’s the car?
[17:37:47] <robin_sz> but yeah, I'll check ... it might be split or something
[17:38:05] <robin_sz> 2006 SMAX
[17:38:22] <robin_sz> random OBD2 bluetooth widget thing
[17:39:08] <andypugh> The reason I asked is because the 3 dials on the dash on the ST are fictitious. I know that because I control oil pressure, and the dials do no match.
[17:39:48] <robin_sz> I am not posh enough to have such modern things
[17:40:08] <andypugh> You are posh enough to have an actual car, unlike me ;-)
[17:40:28] <robin_sz> I even have a working bike ...
[17:40:53] <robin_sz> got the carbs on the GSXR fixed after all these years
[17:40:58] <andypugh> There’s posh!
[17:41:09] <Sync> andypugh: I hate that
[17:41:09] <andypugh> See you at Cadwell?
[17:41:14] <robin_sz> its the one Curtin threw at the scenery ..
[17:41:31] <robin_sz> Ah Cadwell ... ive nto got around to that ...
[17:41:44] <robin_sz> its the 20th year isnt it?
[17:41:49] <andypugh> Very few spots left, 6 last time I looked.
[17:43:02] <robin_sz> I may have to look at that soon then ..
[17:43:03] <andypugh> Doh! I was about to give you the Mallard URL. :-)
[17:43:14] <CaptHindsight> http://chicago.craigslist.org/chc/tls/5611792365.html $400
[17:43:22] <robin_sz> I'm sure I still have the master password for the booking system anyway ;)
[17:43:41] <robin_sz> assuming Ruffel still uses the "mallard" thing that Adam and I wrote
[17:45:44] <andypugh> He does, and there are 5 spaces left (slow group only). If you leave it much longer you will need that password to edit the database by hand.
[17:46:18] <robin_sz> thats fine, I am old and slow anyway
[17:46:22] <andypugh> We have an actual TT racer in the slow group.
[17:46:29] <robin_sz> lol
[17:46:57] <andypugh> Though Ann is a sidecar pasenger, and nothing like as fasat as she thinks she is :-)
[17:47:14] <robin_sz> lol, inky ann?
[17:47:29] <andypugh> Aye
[17:47:48] <robin_sz> I shall have to see what can be done ...
[17:48:10] <robin_sz> and find someone to look after my rabbit
[17:48:27] <andypugh> I am booked in the slow group too, I was too slow.
[17:48:36] <robin_sz> which turns out not to be a rabbit after all
[17:48:49] <robin_sz> slow is fine by me, I am slow these days
[17:48:51] <andypugh> The rabbit can play with the other rabbits that hang out in front of the circuit office.
[17:49:13] <robin_sz> cat brought it me in January
[17:49:15] <andypugh> OK, what;s the story about the mystery lagamorph?
[17:49:17] <robin_sz> I fed it
[17:49:23] <robin_sz> nurtured it
[17:49:30] <robin_sz> thought "its growing well"
[17:49:36] <robin_sz> "and such big ears" ...
[17:49:39] <robin_sz> errm ..
[17:49:41] <andypugh> Leveret?
[17:49:42] <robin_sz> hare.
[17:49:43] <robin_sz> aye
[17:49:57] <robin_sz> wikipedia says
[17:49:59] <robin_sz> 7kg
[17:50:02] <robin_sz> agressive
[17:50:49] <robin_sz> so far, is top fun ... around the living room at 40mph and follows me around, sits on my chest etc
[17:50:55] <robin_sz> comes when called
[17:51:03] <andypugh> I am sure the Colne Valley Beagles would like it. Don’t worry, they dare not ever catch anything, it would leave them nothing to chase the next weekend :-)
[17:51:24] <robin_sz> lol, beagles are not very fast
[17:51:43] <robin_sz> wait ..
[17:51:49] <robin_sz> no thats basset hounds
[17:51:57] <robin_sz> ok, beagles are fast
[17:52:08] <andypugh> It’s a hunt, but a foot-based one. I have slightly more time for them than the horse-based hunts, but only very slightly.
[17:52:33] <andypugh> Interestingly all the farmers local to my parents hate the hunt.
[17:52:41] <robin_sz> I shoot things, and when I shoot them, they are alive one instant, dead the next
[17:52:54] <Loetmichel> i just wanted to say that i knew a beagle with builtin turbocharger... MAN was that beast fast ;)
[17:53:14] <zeeshan|2> hm
[17:53:20] <zeeshan|2> i was told today an electrical choke can limit current?
[17:53:23] <zeeshan|2> its just a big ass inductor..
[17:53:24] <robin_sz> yes, local farmers here are mostly anti-hunt .. they used to just ride wherever and break fences, hedges ..
[17:53:36] <robin_sz> zeeshan|2, AC current, yes
[17:53:45] <zeeshan|2> they were pushing 10,000amps
[17:53:54] <robin_sz> and?
[17:54:00] <zeeshan|2> but only 1000A was making it into the switchgear
[17:54:09] <robin_sz> nope
[17:54:25] <robin_sz> you can't lose current
[17:54:26] <Sync> andypugh: tbh I was let down by all the STs
[17:54:51] <robin_sz> if 1000A was going into the switchgear, 1000A was going thorugh the inductor, assuming it was in series
[17:54:58] <zeeshan|2> okay i just read about it
[17:55:03] <zeeshan|2> lab tech didnt know what hes talkin about
[17:55:04] <andypugh> Kirchoff says that the current is the same everywhere.
[17:55:08] <zeeshan|2> it was 10,000a
[17:55:10] <zeeshan|2> thats why i was confused
[17:55:15] <zeeshan|2> theyre just limiting the inrush current
[17:55:18] <zeeshan|2> that makes sense
[17:55:33] <robin_sz> in a DC system, yes
[17:55:43] <zeeshan|2> its A/C
[17:55:50] <robin_sz> then they arent :)
[17:56:04] <zeeshan|2> https://en.wikipedia.org/wiki/Current_limiting_reactor#/media/File:Current_Limiting_Reactor.jpg
[17:56:10] <robin_sz> well
[17:56:12] <zeeshan|2> looks like they are
[17:56:22] <zeeshan|2> wiki doesnt lie!
[17:56:31] <HoloPed> Is anyone using CamBam for a laser cutter ?
[17:56:45] <CaptHindsight> I can make you a choke to lose 9000A
[17:56:49] <HoloPed> Is there a way to make the post-processor default , so I don't have to add it every single time
[17:57:06] <zeeshan|2> would it be 5" diameter? with a 2" hole?
[17:57:10] <zeeshan|2> 4" long?
[17:57:14] <zeeshan|2> cause thats what they were using
[17:57:17] <zeeshan|2> split type
[17:57:23] <robin_sz> please see Mr Kirchoff
[17:57:36] <zeeshan|2> anyway, my intituion was correct
[17:57:39] <zeeshan|2> the current couldnt have dropped
[17:57:44] <zeeshan|2> but they were limiting the inrush current
[17:57:46] <CaptHindsight> nah it would be much larger since it would convert most of it to heat
[17:57:48] <robin_sz> you can certainly use an inductor to limit current, in AC it is liek a resistor ...
[17:58:08] <zeeshan|2> you just said you couldnt
[17:58:27] <robin_sz> depending on what the load is on the other side
[17:58:28] <CaptHindsight> yeah well don't believe everything you see on IRC
[17:58:36] <CaptHindsight> smartasses
[17:58:47] <robin_sz> but, what current flows in, flows out
[17:58:58] <zeeshan|2> CaptHindsight: lol yea
[17:59:03] <zeeshan|2> i double check everything on irc
[17:59:06] <zeeshan|2> unless its from a reliable source
[17:59:09] <zeeshan|2> ie andypugh :]
[17:59:26] <zeeshan|2> guy is a walking dictionary of engineering
[18:00:06] <CaptHindsight> I'm like sitting tub of cottage cheese of engineering
[18:00:21] <CaptHindsight> but i digress
[18:01:10] <CaptHindsight> http://chicago.craigslist.org/nwc/bfs/5607050350.html whole shop of machines for sale
[18:02:12] <robin_sz> zeeshan|2, big ferrite bead?
[18:05:05] <zeeshan|2> split type bead
[18:05:42] <robin_sz> you can do the maths, to limit a power source to 1000A, just work out the impedance needed using ohms law, and make the inductor up to that value from 2 * pi * f * L ... you'll need a fairly large vlaue at 240V and 50 or 60 Hz
[18:06:44] <robin_sz> I doubt a single ferrite bead, even one 5" diamter and 4" long would be enough
[18:08:41] <robin_sz> it would be useful for limiting inrush if the contactor was closed not on a zero crossing point
[18:08:47] <robin_sz> as there are some higher harmonics
[18:09:02] <robin_sz> but its not going to have a huge effect at 50Hz
[18:09:28] <robin_sz> thats possibly more likely what it was doing
[18:09:49] <zeeshan|2> yea never trust the technician!
[18:10:21] <zeeshan|2> even though my electrical background is not the greatest compared to an ee
[18:10:24] <zeeshan|2> i can still detect BS
[18:10:26] <zeeshan|2> :D
[18:11:39] <Sync> zeeshan|2: pulsed dc?
[18:11:50] <zeeshan|2> no
[18:11:51] <zeeshan|2> its all dc
[18:11:55] <Sync> k
[18:11:59] <zeeshan|2> ac
[18:12:00] <zeeshan|2> i mean
[18:12:04] <zeeshan|2> they have a massive auto transformer
[18:12:06] <zeeshan|2> massive!
[18:12:09] <zeeshan|2> looks like tesla's lab
[18:18:59] <andypugh> SpeedEvil: Suddenly the material costs are non-trivial: https://youtu.be/u7xRjE3Sylw?t=6m32s
[18:20:03] <andypugh> (I started too late, that’s a length of 6mm square gold)
[18:20:27] <SpeedEvil> ah
[18:26:23] <Valen> damn!
[18:26:37] <Valen> that'd have to be like $100,000 or so worth of gold
[18:28:51] <cradek> andypugh: is the quenching after the material is back to black important for annealing? I get adequate results by just letting it air cool, but am I missing something?
[18:29:59] <andypugh> Depends on the material. Quenching never helps with annealing. But it can save you some time, and with copper it shakes off the scale.
[18:29:59] <cradek> (I guess gold and silver might behave differently)
[18:30:18] <cradek> that's what I figured, thanks
[18:30:51] <cradek> dumping the silver in pickle while it's still warm seems to help the flux slag dissolve
[18:32:56] <andypugh> I haven’t worked with precious metals yet. But my sister does, she’s a jeweller.
[18:33:10] <cradek> I work with gold some and silver some more
[18:33:57] <andypugh> My sister has the cutest ever welder, oxy-hydrogen and uses hypodermic needles for nozzles.
[18:34:18] <cradek> I have some 10k frames I'm getting up the nerve to work on - it seems so easy to get the copper color to come to the surface and so hard to get rid of it
[18:34:57] <cradek> I have a torch that uses what looks like ruby watch jewels in the tips of the finer nozzles
[18:35:09] <cradek> have not seen needles - very neat
[18:35:19] <cradek> I bet that's a very tiny flame
[18:35:44] <andypugh> About a 1mm blue cone
[18:35:57] <andypugh> And, talking of gold: http://www.lateralscience.co.uk/gold/
[18:38:59] <cradek> recently I read the the crackdown on the drug trade in colombia has caused small gold mining operations to come about, and that results in terrible mercury poisoning everywhere
[18:39:18] <Erant> btw: http://www.ebay.com/itm/MHC-Cobalt-Square-Tool-Cutting-Bit-3-8-x-3-8-/350846263685
[18:39:43] <Erant> Just stocked up on blanks from there. 15 5% cobalt blanks for like $20 shipped.
[18:39:44] <andypugh> cradek: No good deed goes unpunished.
[18:40:05] <Erant> (I need to practice grinding them, so.)
[18:40:32] <andypugh> Not that I am convinced that cracking down on the drug trade is good, but everything that any government does seems to end up with unintended consequences
[18:40:50] <cradek> agree on both counts
[18:41:59] <cradek> this article says 50-100 metric tons of mercury are "lost" annually
[18:42:42] <Sync> yeah, it is stupid
[18:43:26] <JT-Shop> I have never been lost, but I will admit to being confused for several weeks. Daniel Boone
[18:46:17] <robin__> there was an awesome youtube series with a guy "doing stuff" with precious metals
[18:46:27] <robin__> like refining 9kt gold to 24kt
[18:46:42] <robin__> and extracting gold from PCB fingers
[18:47:03] <robin__> and his most amusing one ... harvesting paladium
[18:47:14] <robin__> from road dust
[18:47:35] <cradek> ah cody's lab
[18:47:38] <robin__> yes
[18:47:39] <cradek> platinum
[18:47:40] <robin__> him
[18:47:44] <cradek> he's awesome
[18:47:47] <robin__> platinum
[18:47:51] <robin__> thats was it
[18:48:02] <robin__> its a paladium group metal anyway ;O
[18:48:15] <robin__> he really knows his shit on the chemistry
[18:48:23] <Sync> he could have harvested it from silicone
[18:48:42] <robin__> breast implants?
[18:48:52] <Sync> those would work
[18:49:18] <robin__> getting hold of them is tricky, those that have them dont usually want to give them up
[18:49:54] <Sync> there are samples on ebay all the time
[18:50:08] <robin__> of breast implants?
[18:51:02] <robin__> I suppose amateur surgeons have to get their supplies somewhere
[18:51:35] <andypugh> Archaeologists talk of the “Beaker People” because they find beakers in their graves. I think that we will be called the “Silicone Jellyfish People” based on what they find when they excavate our high-status graves.
[18:52:44] * robin__ nods
[18:53:07] <robin__> you got to laugh at tbe BBC ...
[18:53:29] <robin__> the latest polls on the referendum outcome ... 41% in, 41% out .. 14% undecided ...
[18:53:40] <robin__> ummm ... and the other 5%?
[18:53:54] <andypugh> Imigrants with no vote?
[18:54:05] <andypugh> In prison, with no vote?
[18:54:49] <robin__> I was assuming it was "% of people that are allowed to vote"
[18:55:02] <robin__> there are a few billion people in the other set
[18:55:44] <andypugh> I know how I will vote. But I hope I lose, because that way is going to be far more interesting.
[18:55:58] <robin__> im still undecied
[18:56:10] <robin__> my business head says in
[18:56:18] <robin__> my national pride head says out
[18:56:51] <robin__> and we need to invade france again
[18:57:01] <djdelorie> at least this time you can just drive there...
[18:57:12] <robin__> you have a point
[18:57:31] <andypugh> If empire building was still an option it would be an easier decision.
[18:57:57] * robin__ points at putin
[18:58:05] <robin__> have you told that guy?
[18:58:17] <andypugh> Good point, we could invade Russia.
[18:58:39] <robin__> visit russia before russia visits you ...
[18:59:16] <robin__> I suspect it is going to be very close ...
[18:59:27] <robin__> and either way, neither side will be happy
[18:59:38] <andypugh> Like the Scotch thing
[18:59:50] <robin__> yes, very much so
[19:00:04] <robin__> and I really am undecided
[19:00:10] <andypugh> If we do leave, the Scots will want back in, I suspect
[19:00:20] <robin__> and take the Euro?
[19:00:32] <andypugh> Theu don’t qualify :-)
[19:00:49] <andypugh> For me, head says in, heart says out.
[19:00:52] <robin__> you have to take the euro, and qualify to be let back in I think
[19:01:09] <robin__> same here
[19:01:17] <robin__> I suspect out will be a mistake
[19:01:32] <robin__> but, sometimes its still the right thing to do
[19:01:34] <robin__> I dunno
[19:01:39] <andypugh> But a really interesting mistake.
[19:01:52] <robin__> very much so
[19:02:27] <robin__> its like being in a queue of traffic ... if you swap lanes, you might (or might not) have an advantage
[19:02:50] <robin__> but if you stay in lane, you are guaranteed to be stuck behind the same guy
[19:02:54] <andypugh> And, some time later, you know if you made the right choice.
[19:03:00] <robin__> yep
[19:03:24] <robin__> but when we re-take brittany ...
[19:03:37] <andypugh> Nah, Toulon
[19:04:15] <robin__> we still owe the French for refusing to give up the IFF codes for the Exocets during the Flaklands
[19:05:18] <robin__> we really should have sent a few Vulcans over Paris at low level for that one
[19:05:30] <andypugh> Maybe.
[19:06:01] <andypugh> They would, of course, need to be able to deny that they had done, but events kind of hint that they didn’t.
[19:06:20] <andypugh> We owe the US one for invading Grenada, too.
[19:06:38] <andypugh> They should at least have asked.
[19:07:48] <robin__> I'll put that on my list
[19:10:27] <robin__> the french actually had a team of missile engineers working in Argentina throughout the war
[19:11:03] <Sync> I'm actually glad they did not give them up very quickly
[19:11:16] <Sync> kinda ruins the fun if nobody can play with your weapons
[19:11:21] <andypugh> They probably had a contractual obligation.
[19:11:52] <andypugh> And, certainly, my German friend is convinced we should give the Falklands to Argentina.
[19:12:21] <Sync> nah, idk
[19:12:41] <andypugh> (I am trying to remeber who the Argentinian guy is who hangs out here)
[19:14:33] <andypugh> Not sure how BAe would act if a French overseas territory was in the same situation.
[19:15:23] <Sync> probably depends on who pays the best
[19:16:52] <andypugh> Yes. The situation was not UK gov v French gov, it was UK gov v Aerospaciale
[19:23:32] <robin__> true, but ...
[19:27:04] <robin__> plenty of nice tig welding stuff turned up today
[19:27:21] <robin__> tungstens, collets, gas lense etc
[19:27:27] <robin__> and a Tig FInger
[19:27:39] <andypugh> Tig Finger?
[19:28:02] <robin__> big thick bit of glass fibre matt tube
[19:28:21] <andypugh> I accidentally won a Tree boring head in an auction last week.
[19:28:28] <robin__> goes over a finger so you can slide along to support your hand on the metal without burning it
[19:28:28] <Sync> yeah it is just a bit of 45mm or so fiber tube folded into itself
[19:28:42] <Sync> I still want it andypugh :P
[19:28:43] <robin__> "accidentally"
[19:29:09] <robin__> Sync, it looks likes its going to be kinda useful
[19:29:11] <andypugh> I asked Cyclops to bid £53 for me.
[19:29:33] <andypugh> I didn’t expect to win.
[19:29:40] <robin__> bargain
[19:29:51] <andypugh> Yes, by about an order of magnitude
[19:30:11] <robin__> nice micromter adjustable one?
[19:30:28] <andypugh> They bore tapers
[19:30:49] <andypugh> I already have a pair of Wohlhaupters.
[19:31:12] <robin__> oh, neet
[19:31:21] <andypugh> Try Gwgl.
[19:31:47] <robin__> like tapers for .. say, spindle noses?
[19:32:17] <andypugh> Potentially, but why would you do a spindle nose with a boring head? You would use a lathe.
[19:45:58] <Frank_3> guyysss, whats CR and CRM on a wiring diagram? not even google knows what it means
[19:46:00] <Frank_3> hee
[19:50:58] <andypugh> I think CR is an LED
[19:53:59] <andypugh> http://electronics.stackexchange.com/questions/25308/what-do-the-pcb-markings-mean says that CR is a diode in general, including an LED
[19:57:58] <djdelorie> CR used to mean Crystal Rectifier...
[20:08:17] <Frank_3> wired
[21:48:56] <Danilochka> Hello, How do I ground a DB9 connector pin for estop
[21:49:16] <Danilochka> Like hook up wise, I ground it to GND on PSU?
[21:49:34] <Danilochka> Because there is also GND pins on the DB9
[21:49:39] <Danilochka> Im having a brain fart
[22:44:11] <dioz> so...
[22:44:39] <dioz> what available sensors are there to determine position of a hydraulic cylinder?
[22:58:20] <McBride36> dioz, i can think of a few
[23:00:14] <McBride36> dioz, http://www.sensorsmag.com/product/inductive-sensor-replaces-magnetostrictive-position-sensors-0
[23:02:51] <dioz> thnx
[23:03:04] <dioz> i've never done something liek this i'm just looking at stuff
[23:03:38] <dioz> how do they work?
[23:03:46] <dioz> like a donut with a rod running through it?
[23:05:03] * zeeshan|2 warmed up tonight to refresh smart wiring between autocad electrical and inventor
[23:09:05] <zeeshan|2> http://imgur.com/a/sq0YY
[23:09:15] <zeeshan|2> pretty much go from diagram to physical
[23:09:18] <zeeshan|2> with a couple clicks :D
[23:13:40] <dioz> zeeshan|2: ever use freecad?
[23:13:46] <zeeshan|2> no
[23:13:58] <dioz> isn't autocad expensive?
[23:14:35] <zeeshan|2> its like 1500 bux
[23:14:42] <zeeshan|2> inventor is 3500
[23:14:45] <zeeshan|2> both are worth the money
[23:14:46] * dioz whistles
[23:14:51] <dioz> too rich for my blood
[23:15:29] <dioz> i'll stick with freecad
[23:15:48] <djdelorie> dioz: have you tried the free Fusion 360?
[23:15:58] <dioz> nope
[23:16:01] <djdelorie> (assuming you qualify for the "Free" part)
[23:18:00] <dioz> it isn't that i'm cheap
[23:18:15] <dioz> that's just a lot of money to spend on software imo
[23:18:20] <dioz> as a individual
[23:18:45] <dioz> i'll download this free fusion 360
[23:18:52] <dioz> it totes itself as being "the next generation"
[23:18:59] <dioz> i'm interested in seeing what that means
[23:19:07] <djdelorie> all the autocad, plus cam, they might be right...
[23:19:54] <dioz> it's just a trial?
[23:21:14] <dioz> oh i see
[23:22:45] <Polymorphism> F360 is the best
[23:23:05] <zeeshan|2> tomorrow will be a long day
[23:23:10] <zeeshan|2> lots of harnessing at work
[23:23:18] <Polymorphism> always a burden
[23:24:21] <CaptHindsight> bondage?