#linuxcnc | Logs for 2013-10-17

[00:36:43] <jesseg> Hey, do you know if there is a metric sister to "Nema" motor size standards?
[01:59:46] <MacGalempsy> evening again all
[02:10:58] <terabyte-> hey
[02:11:06] <terabyte-> got my first cnc machine working today
[02:11:11] <terabyte-> with linuxcnc
[02:11:37] <archivist> another happy bunny
[02:33:11] <_DJ_> moin
[02:37:13] <MacGalempsy> awesome. terabyte- got any pics?
[02:37:45] <terabyte-> http://www.flickr.com/photos/thespeedphreak/sets/72157636520041636/
[02:37:49] <MacGalempsy> Been working on the ATC logic board I/O. got about 80% of the wired figured out already
[02:38:14] <terabyte-> and
[02:38:15] <terabyte-> https://vimeo.com/77110096
[02:38:22] <terabyte-> password is "linuxcnc"
[02:38:39] <MacGalempsy> good work. that looks really nice. kit or homebrew?
[02:38:59] <terabyte-> thats a kit
[02:39:11] <terabyte-> http://www.cncrouterparts.com/crp4848-4-x-4-cnc-router-kit-p-137.html
[02:39:16] <terabyte-> im really impressed with it
[02:39:33] <terabyte-> now that i have a machine i might try to make one of my own later
[02:39:47] <MacGalempsy> it becomes addictive
[02:40:04] <archivist> it needed that much WD40 :)
[02:41:38] <MacGalempsy> I got a 3 wire lead coming out of the powerdrawbar air motor. anyone got any ideas?
[02:41:39] <terabyte-> ha ha ha ha ha ha
[02:42:42] <MacGalempsy> I thought encoder, but not enough leads
[02:43:55] <archivist> MacGalempsy, the switch connections so you know its open/closed?
[02:45:08] <MacGalempsy> very possible. I guess getting some air on the spindle would allow for an electrical test on the leads
[02:45:33] <MacGalempsy> archivist: you are thinking ground / Open loop / closed loop?
[02:45:33] <toastyde1th> valve?
[02:45:42] <MacGalempsy> no the valves are in the back
[02:45:44] <terabyte-> its 3:30am local time, good night folks
[02:46:00] <MacGalempsy> nighty night. congrats on getting the build done
[02:46:22] <terabyte-> thanks MacGalempsy
[02:46:33] <terabyte-> good luck with that extra wire
[02:46:33] <terabyte-> lol
[02:46:40] <MacGalempsy> ha!
[02:48:23] <archivist> you need to know when clamped or not before you move on/off a tool
[02:48:40] <MacGalempsy> agreed
[02:49:09] <MacGalempsy> so now that I have all the wires figured out, I guess its time to start getting the logic down for a tool change
[02:50:04] <MacGalempsy> there are three pneumatic actuators with endstops, one dc motor with encoder, the air motor with endstop?
[02:52:01] <archivist> what no manual!
[02:53:28] <MacGalempsy> no the jerks at Light Machine Corp said no way
[02:54:16] <MacGalempsy> I may still brow beat them a little when it comes to that special occasion
[03:00:24] <archivist> I cant find them on the web
[03:01:22] <MacGalempsy> intellitek
[03:01:50] <MacGalempsy> http://www.intelitek.com/
[03:02:13] <MacGalempsy> I am curious about the 10 leads coming off the encoders
[03:02:23] <MacGalempsy> because the mesa board only has 8
[03:03:12] <MacGalempsy> may2 are power?
[03:06:11] <archivist> follow leads back to encoder and see the real partnumber, download data from other company
[03:06:42] <archivist> are they differential signals
[03:09:29] <MacGalempsy> I will do that
[03:10:22] <MacGalempsy> Right now I am trying to get the ATC controller card connections together. just about done for the fist phase. Then I can move on to the Mainboard
[03:13:09] <archivist> finding what the three wires do, add air operate each air solenoid, see what interconnections are on the three wires are with a meter
[03:16:54] <MacGalempsy> sounds like a good plan.
[03:17:54] <MacGalempsy> ok going back out to the garage.ruby
[03:22:16] <MacGalempsy> hey hey back
[03:22:57] <MacGalempsy> http://tinyurl.com/o5rk3w9 hangout?
[05:59:14] <mrsun_> ok! was thining about testing package management etc, what are the images to download ? the most current nightly images? :)
[05:59:20] <mrsun_> ffs
[05:59:23] <mrsun_> wrong channel =)
[07:07:23] <exco> any reason why default acceleration has precedence over axis-> max acceleration (with genserkins)?
[08:26:33] <MacGalempsy> A whole night spent cataloguing wires
[08:39:13] <njh> MacGalempsy: I love wires
[08:42:24] <jdh> I like wires that other people label
[08:43:59] <MacGalempsy> Yeah? well you would love these then. I labled about 50 harnesses, with breakdown per wire (when possible)
[08:45:54] <MacGalempsy> well, im going to hit the sack. later today is a whole new expedition!
[08:46:07] <Jymmm> Labels are for wimps!
[08:48:44] <Jymmm> Just lick it to figure out what it's for!
[09:09:18] <leonvnoord> hi guys, I have a question
[09:09:43] <leonvnoord> I'm new to CNC and getting started with it
[09:10:58] <leonvnoord> I would like to know how I can control a CNC machine using a breakout board and a parallel port
[09:11:43] <jdh> 1) install LinuxCNC, 2) hook up breakout board to parallel port, 3) hook up motors/etc to breakout board, 4) make chips
[09:13:28] <leonvnoord> the point is that I want to control the CNC with my own embedded software. Should I create g-code with my software and the send it to linuxCNC?
[09:13:48] <leonvnoord> I have no experience with this, so things are not really clear to me
[09:18:54] <ReadError> why re-invent the wheel
[09:21:07] <Tom_itx> agreed
[09:25:20] <leonvnoord> I'm using it for a laser cutting machine. My software calculates where the machine should cut. So I need to translate the output of my software to either g-code and send it to linuxCNC, or I need to speak to the breakout board to drive the cutter.
[09:25:50] <leonvnoord> That's what I think in any case.
[09:26:08] <Tom_itx> there are programs to translate it to gcode
[09:26:17] <Tom_itx> then let linuxcnc cut it
[09:27:28] <leonvnoord> 'it' is the result of my program, which is not a standard fileformat. So another option would be to create a file with a supported format from within my software, I guess.
[09:28:21] <leonvnoord> thanks for the input by the way :)
[09:28:56] <kwallace> If you are handy with software, you could modify the LinuxCNC interpreter.
[09:31:40] <leonvnoord> I am a software engineer, I'm not very used to interact with hardware so there's a lot of researching involved to get things clear :)
[09:33:34] <leonvnoord> Will look into the interpreter, thanks
[09:36:35] <kwallace> A shot in the dark: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?StandAloneInterpreter
[09:42:09] <jdh> linuxcnc handles the hardware fine, re-inventing that would be a major hassle.
[09:42:23] <archivist> leonvnoord, linuxcnc already knows about laser cutters, so outputting g code is probably the way to go
[09:47:44] <kwallace> leonvnoord: This might help too: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?PythonBindings
[09:50:39] <archivist> leonvnoord, stuff like http://wiki.linuxcnc.org/cgi-bin/wiki.pl?LaserBeamCompensation
[09:51:59] <kwallace> and: http://www.linuxcnc.org/index.php/french/component/content/article/42-emc-internals
[09:54:18] <kwallace> archivist: I did a bit more work on my motorcycle CDI, it's looking like the rotor magnets are weak.
[09:54:51] <archivist> there are people who can remagnetise
[09:55:28] <kwallace> This guy is in the next town: http://www.oldengineshed.com/main.html
[09:55:47] <kwallace> I needed an excuse to go visit anyway.
[09:57:06] <archivist> magneto rebuilders have to do it on a regular basis
[09:58:07] <kwallace> I got this guy's coils a few years back, so I asked him about it: http://www.rickystator.com/
[09:58:42] <kwallace> He said it is very unlikely the magnets would lose strength.
[09:59:36] <kwallace> They are ceramic from 1982 so I am suspicious.
[10:01:03] <archivist> I would be suspicious too
[10:01:53] <kwallace> I put a combination wrench on the magnets and it was fairly easy to remove. I'm used to coming close to damaging something playing with these.
[10:03:00] <archivist> if the magnets been left out, without the stator
[10:04:00] <kwallace> There is not much of a stator: http://www.wallacecompany.com/KDX250/
[10:08:58] <kwallace> The case was half full of water, for who knows how long, when I got it. I patched it together and rode it for a year, but now the ignition won't work.
[10:09:58] <archivist> I might be inclined to use a battery and just take the timing from the crank
[10:13:53] <kwallace2> From what I have read, the current fixed timing is a compromise between being able to kick start and high end torque. A magnetic pick-up and micro-p might improve that. I just don't need _another_ project right now.
[10:14:24] <kwallace2> It looks like I'm getting one either way.
[10:14:28] <archivist> but...but ...you know you do really :)
[10:16:00] <kwallace2> I've got one of these coming today: http://www.tormach.com/product_pcnc_770.html
[10:18:45] <archivist> you can make a new ignition from scratch then
[10:24:27] <leonvnoord> thanks again for the help guys, I think I'll come visit this place more often
[10:24:33] <leonvnoord> cya
[10:26:09] <kwallace2> leonvnoord: Good luck with your project.
[10:30:25] <CaptHindsight> PCW: http://store.r0ck.me/products/cubietruck-2gb-ram-8gb-flash-with-wifi-bt now with more stuff for $89
[10:38:21] <pcw_home> unfortunately different expansion connectors though
[12:07:18] <IchGuckLive> hi all B)
[12:22:38] <IchGuckLive> Cylly: ?
[12:22:44] <Cylly> jo?
[12:23:07] <IchGuckLive> wie heisen die blindstopfen für die schaltschrankverschraubungne
[12:23:34] <IchGuckLive> reichelt nummer vileicht
[12:23:36] <Loetmichel> brass or plastic?
[12:24:07] <IchGuckLive> plastic
[12:24:21] <Loetmichel> IchGuckLive: https://www.google.de/#q=blindstopfen+pg-verschraubung&safe=off&spell=1
[12:25:02] <Loetmichel> http://www.mercateo.com/p/721-01215206/BETTERMANN_108_Verschlussschraube_PG7.html for example
[12:25:44] <Loetmichel> the keyword is "PG-Verschraubung"
[12:26:44] <IchGuckLive> mercy
[12:30:33] <IchGuckLive> Loetmichel: they are so expensive that i go for a normal MBF and a cable snap ! 10cents
[12:32:08] <IchGuckLive> sorry 25cent MBF12
[12:33:08] <IchGuckLive> i need to build 5 more CNC plasmas
[12:36:52] <Loetmichel> ahem...
[12:37:29] <archivist> for something working hard use good stuff not cheap sh...
[12:37:29] <Loetmichel> mercy is erbarmen in deutsch... you meant mercie, didnt you?
[12:38:23] <Loetmichel> IchGuckLive: try "verschlussstopfen" for the soft plstick variant for snap in
[12:38:35] <Polask> I have Windows 2003 for File Server. Now I would like to upgrade it to Windows 2008 R2. Now - Windows 2003 sits on our vCenter and I've created a new guest with Windows 2008 R2. The issue that I am having is that to the Windows 2003 are attached 3 RDMs from our EMC. Now how to do migration from windows 2003 to windows 2008 file server? how do I copy all the security/permissions/auditing on
[12:38:35] <Polask> the windows 2003 to Windows 2008? Should I just unmount and mount the 3 RDMs on the Windows 2008 server and thats it?
[12:41:13] <kwallace2> No, dd the partition and install Linux :)
[12:41:25] <archivist> Polask, wrong emc
[12:41:29] <Polask> yep
[12:41:30] <Polask> wrong emc channel
[12:41:32] <Polask> nw I see :)
[12:42:15] <archivist> fat corp made us change our name too
[12:42:42] <Polask> lol
[12:42:44] <Polask> thanks
[12:47:38] <andypugh> Does anyone have a preferred type of hose for the coolant drain from a milling table?
[12:48:06] <andypugh> The original hose has gone very stiff, so it sits high when the table is low.
[12:48:17] <andypugh> (so that the coolant doesn't drain)
[12:50:32] <kwallace2> You don't like the original type?
[12:51:08] <archivist> you might find some coolant hose from a car
[12:51:58] <Loetmichel> for extended flexibility: use a silicone tube meant for model airplane mufflers
[12:52:18] <Loetmichel> about the right size, stiff but not too stiff
[12:52:20] <andypugh> The hose that was on the machine was formerly-transparent PVC hose, but it seems to not be particularly well-suited to the job
[12:53:14] <archivist> pvc goes as stiff as wood
[12:53:16] <Loetmichel> only caveat: be careful wenn you remove swarf coils, silicone tubing can be cut like jello
[12:53:55] <Loetmichel> archivist: thats because the coolant washes the softenmers out of the pvc
[12:53:59] <Loetmichel> softeners
[12:54:14] <Loetmichel> in silicone rubber IS no softener-> stays soft
[12:54:23] <andypugh> I am looking at http://www.pond-planet.co.uk/pond-pipework-fittings-flexible-pond-hose-flexible-pond-hose-25mm-p-374.html?gclid=CKT4j8u0nroCFU_HtAodWwMA5Q
[12:55:08] <Loetmichel> screams PVC for me
[12:55:35] <archivist> remember car hose is designed for a more evil chemical environment
[12:59:10] <andypugh> I can buy a lot of pond hose for the price of this: http://www.demon-tweeks.co.uk/performance/universal-straight-hoses/samco-superflex-air-water-straight-silicone-hose
[13:00:09] <archivist> dont you have a "local" supply :)
[13:00:41] <andypugh> No, all our hoses are moulded to the exact shape and length
[13:01:27] <archivist> and I bet there is something near enough if cut short
[13:02:09] <archivist> also the local elcheapo pattern car parts shop will have pipe by the length
[13:02:42] <andypugh> The problem is finding something _long_ enough.
[13:03:12] <andypugh> It runs from the corner of the table to the side of the base.
[13:03:45] <archivist> the one here has a reels of various sizes
[13:04:25] <archivist> B&Q also has reels iirc
[13:04:35] <archivist> but only pvc
[13:04:40] <andypugh> I just came from B&Q and didn't see any
[13:05:22] <archivist> was a while since I looked at the reeled stuff
[13:06:28] <andypugh> At £1/m I think I will see how the pond hose works out.
[13:06:59] <archivist> halfords http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_184617_langId_-1_categoryId_165746
[13:08:40] <andypugh> Ah, yes, looks like a good bet. Need to check the fitting sizes.
[13:09:47] <andypugh> How did you find that? Searching for "Heater Hose" doesn't find it
[13:10:03] <archivist> halfords heater hose :)
[13:10:55] <IchGuckLive> expencive per meter
[13:10:56] <archivist> writing ones own search engine helps use of google
[13:11:01] <mevon> hey everyone how good are you? :P Can someone help me with my TB6560 board its kinda over heating my small nema17 motors and I was wondering if there is something to do besides going at 25% of 18V and lowering maximum speed?
[13:11:04] <andypugh> Ah, OK, so you didn't actually search on the Halfords site?
[13:11:12] <archivist> no
[13:11:39] <andypugh> mevon: Dropping voltage is the wrong way to do it. (and won't work).
[13:11:56] <andypugh> You need to lower the current limit.
[13:12:02] <archivist> steppers getting warm/hot is not a problem
[13:12:16] <mevon> andypugh: changing sensing resistors?
[13:12:22] <andypugh> He said "over heating" so I presume he means glowing red :-)
[13:12:43] <andypugh> Are there any current-setting jumpers on the board?
[13:12:44] <archivist> some jump at 50 deg c
[13:12:56] <archivist> wimps
[13:12:57] <mevon> andypugh: I didnt go that far, I didnt want to burn the small things
[13:13:13] <andypugh> They should be OK to about 80C
[13:13:22] <archivist> mevon, you cannot lean on my steppers
[13:14:02] <mevon> archivist: do you have heatsink on them?
[13:14:06] <archivist> when bolted to the machine, that should cool them
[13:14:19] <archivist> the machine is the heatsink
[13:14:43] <mevon> i see :S
[13:15:06] <mevon> I have put the current setting to 25%
[13:15:27] <archivist> my B axis has the worst thermal conduction to the machine mass and gets to 50 dec c or more
[13:15:50] <mevon> but I will get a thermometer and see if i go over 80 deg cel
[13:16:52] <mevon> is it normal that the motors get hot when not movieng? eg: i lunch linuxcnc and without moving the thing the motors get hot..
[13:16:58] <archivist> http://www.archivist.info/cnc/stage8/IMG_0269.JPG the for ground motor on pillars
[13:17:37] <archivist> yes they get hotter stationary, it is the holding current
[13:17:38] <mevon> my motors are erally smaller then that
[13:20:44] <archivist> that is a 180Ncm 57x57x76mm sized motor
[13:22:52] <mevon> i think i have the cheapest nema 17 you can find: 17pm k502 p1st
[13:23:00] <mevon> the current settings helps a lot
[13:23:15] <mevon> they dont go over 35 deg c
[13:23:53] <archivist> lower current=lower torque, a trade off
[13:24:02] <mevon> does it affect the max speed the motors ?
[13:24:09] <mevon> of*
[13:24:10] <archivist> use the right amount for the job
[13:24:13] <andypugh> No, that will stay the same
[13:24:42] <andypugh> Current = torque Voltage = speed.
[13:24:48] <archivist> well lower torque means you cannot achive the top speeds
[13:24:49] <mevon> ok because they sounded a little diff
[13:24:57] <mevon> ok
[13:25:52] <mevon> 25% is very low i think, ill try rising till heat is around 60
[13:26:40] <andypugh> archivist: I am not sure that is necessarily true. If the speed limit is the point where the back emf limits the current, then the speed will be the same at a lower current _limit_
[13:26:55] <archivist> I tested my machine with excess weight on the table, I still had to reduce the max acceleration to avoid it losing steps
[13:27:45] <archivist> time you looked at some speed v current and step rate curves maybe
[13:28:11] <IchGuckLive> mevon: that sounds wear you shoudt give it the amount that is in the datasheet and try to get the mechanical parts to a better performance
[13:28:40] <IchGuckLive> what is your scale on given Inch or metric
[13:33:42] <mevon> hi IchGuckLive i made made configs to be inches
[13:34:07] <mevon> erducing top speed to 0.6 in/sec
[13:34:22] <mevon> my power supply is 18V
[13:34:55] <mevon> a little over the 12V of my small motors but I figured lower the current settings would do the trick
[13:35:01] <archivist> mevon, 18v is a little low
[13:35:47] <mevon> ok i see that now
[13:35:47] <zeehero> I've got a question - how strong of motors are recommended for various sizes of work areas?
[13:35:47] <archivist> one uses the voltage to achieve the set current quicker
[13:36:16] <archivist> zeehero, its about the mass being moved at a rate not the area
[13:37:00] <zeehero> archivist: I suspected as much, I honestly expect someone to sigh, throw a link my way containing information and I could go do the research myself - I'm having awful luck finding data purported to be reliable.
[13:37:01] <archivist> so use the right size for the job
[13:37:22] <archivist> there is a calculator somewhere
[13:37:41] <zeehero> That happens a fair amount in the reprap irc, heck the bot's job is to provide easy information for novices.
[13:38:01] <zeehero> Alright, is there a name I should look for in conjunction with the calculator?
[13:39:03] <zeehero> I'm aiming to build a large gantry system that supports a variety of toolheads for manufacture, 2ft by 2ft work area, with ideally about a foot or so of vertical (for the 3D printing side, less so for the milling)
[13:40:05] <archivist> gluegun is just shifting the gantry, where milling also has to deal with cutting load
[13:40:27] <IchGuckLive> mevon: 18V is to low why not 48
[13:40:37] <IchGuckLive> is it a TB6560
[13:41:03] <IchGuckLive> go at min to 24V
[13:41:34] <IchGuckLive> there is your head it takes to lang to build up the step more power
[13:41:44] <IchGuckLive> im off BY
[13:41:52] <IchGuckLive> bye ReadError
[13:42:15] <Jymmm> mevon: Screw 24, do 48+
[13:42:38] <zeehero> archivist: right, that's why to design this I need to look at the specifications needed for the most power hungry application - the milling, I'm not to worried abotu trading 3D printer speed for more accurate milling - I've already got a 3D printer that works fast enough for me, but I want to build a general-purpose machine that focuses more towards milling.
[13:42:41] <mevon> poor little guys... :( http://cncsuperstore.com/index.php?route=product/product&product_id=64
[13:43:13] <mevon> lol the power supply gave away before the motors hahah
[13:43:26] <mevon> 18V are gone now
[13:43:29] <mevon> :(
[13:43:34] <archivist> zeehero, milling what though, wood, aluminium, steel
[13:43:37] <mevon> now Im at 0V
[13:44:24] <andypugh> mevon: Probably running a lt cooler now then?
[13:44:52] <zeehero> archivist: wood, plastic and aluminium predominently, but from what I am lead to believe a CNC milling machine could cut through harder materials by doing more shallow passes at a time - or is that incorrect?
[13:45:05] <mevon> andypugh: yeah this >sleep> feature is amazing!
[13:45:05] <archivist> ew that page does not state a max current
[13:45:28] <zeehero> One guy even suggested a wood milling machine with the right bit and enough passes could mill titanium, but I'm highly skeptical of that.
[13:45:36] <ReadError> awww yea
[13:45:45] <ReadError> i thought IchGuck how to english :)
[13:45:49] <ReadError> taught*
[13:45:50] <ReadError> looool
[13:46:11] <archivist> zeehero, yes as long as the machine is rigid enough, else you get flexing, chatter and tool breakage
[13:46:26] <mevon> http://www.ebay.co.uk/itm/Stepper-motor-MINEBEA-NEMA-17-Type-17PM-K502-P1ST-CNC-MILL-ROBOT-REPRAP-MAKERBOT-/171125797338
[13:46:34] <mevon> 0.6 amps it seems
[13:46:35] <Jymmm> zeehero: Heh, too bad you aren't closer, that's what I'm selling
[13:47:25] <zeehero> That's surprising - I work at a laser cutting facility so I can easily make custome parts for my machine, so if I can research what ensures rigidity I could possibly design a machine that could tackle about anything I could reasonably want to mill.
[13:47:46] <mevon> try the Mantis9.0
[13:48:45] <mevon> whats the best wire type to connect the motors to the electronics?
[13:48:52] <zeehero> It looks interesting.
[13:49:05] <andypugh> zeehero: Laurent is doing quite well milling aluminium patiently on an all-wood machine. http://www.youtube.com/watch?v=bJOY3dwpX_w&feature=share&list=UU_Mjlpaikgv_ysvx0z6G6WQ
[13:49:51] <mevon> http://makeyourbot.wikidot.com/mantis9-1
[13:49:57] <archivist> you can use a dti to detect flex and where to add webs to add stiffness
[13:50:48] <zeehero> mevon: aren't Nema 17s weak for a mill?
[13:51:04] <zeehero> That's what I've got on my RepRap after all.
[13:51:23] <FinboySlick> zeehero: All depends on how light your cuts are.
[13:52:01] <zeehero> FinboySlick: I'd like to be able to mill plywood within 12 hours...
[13:52:17] <mevon> yeah but for a mantis9.1 think its enought well it is in fact because it moves and cuts all right but Im on leadscrews so it has a good tork
[13:52:20] <zeehero> I know that the 70-oz-in motors I've got are weak compared to what milling machines use.
[13:52:31] <andypugh> Within 12 hours of now, you mean? That's quite a tight schedule.
[13:53:03] <zeehero> andypugh: haha, no, I mean I'm familair with how long it takes me to print with a 'gluegun' but that's really not fighting anything with a toolhead to remove material after all
[13:53:10] <FinboySlick> zeehero: with a router spindle, you don't really have to push very hard into the wood.
[13:53:37] <mevon> andypugh: whats the best wire type to connect the motors to the drives?
[13:53:38] <archivist> fun comes when the cut pulls the cutter into the material
[13:53:49] <FinboySlick> So long as you can move fast enough to keep it from burning the material (and fast-wearing your cutter).
[13:54:30] <andypugh> mevon: I don't really know. I used small flex conduit and individual wires on my steppers. But the servos are using Multi-Flex SY.
[13:54:49] <zeehero> FinboySlick: Well, I've got to keep in mind that I want to build a machine large enough to be able to cut a 2ft by 2ft work area, which might not be huge for cnc mills, it's huge for printers
[13:55:55] <zeehero> Hell, if I really wanted to, I'd dare to print an adaptor for my generic router and swap a toolhead on my printer to get a pathetic mill with no tool speed control
[13:55:56] <archivist> add some area for clamping
[13:56:06] <FinboySlick> zeehero: Stronger motors are always going to be a bonus, but you can get by with mechanical reduction and keeping your steppers at half or full step to maximize torque.
[13:56:34] <zeehero> archivist: yup, I knew it was going to have to be bigger, that's what I've been specifying work area for - how much clamping is needed by the way?
[13:56:49] <archivist> depends :)
[13:56:58] <zeehero> Of course it does, heh.
[13:57:09] <FinboySlick> zeehero: double-sized sticky tape can save you.
[13:57:19] <zeehero> FinboySlick: noted
[13:57:22] <FinboySlick> ... or ruin your day.
[13:57:26] <andypugh> mevon: This is the flex-conduit method: https://picasaweb.google.com/lh/photo/_yTAiDN3uUH1bGzbZiDfR9MTjNZETYmyPJy0liipFm0?feat=directlink I also swaged a flange onto the end of the conduit to screw it to the motor. I may have got carried away. :-)
[13:57:28] <archivist> its a bugger when you get a 3ft lump to machine
[13:57:29] <zeehero> FinboySlick: also noted
[13:57:57] <FinboySlick> I meant double-sided, btw.
[13:58:24] <archivist> we bent stuff getting it off the sticky
[13:58:48] <FinboySlick> archivist: I'm not sure that'll be the main problem with plywood though.
[13:58:56] <archivist> and also the following job never sticks properly
[13:59:35] <archivist> we were milling brass sheet stuck on a bit of wood
[13:59:51] <zeehero> Actually, I'm probably gonna be stupid and just try to build a CNC out of salvaged materials first, make my mistakes and learn straight away there.
[14:00:11] <zeehero> Then go to a kit and be much happier with standardized materials and instructions.
[14:00:12] <FinboySlick> zeehero: That's the best way to go.
[14:00:26] <FinboySlick> zeehero: I regret buying a machine not knowing what really matters.
[14:00:42] <mevon> andypugh: oh i see but man does it look good
[14:00:46] <andypugh> zeehero: You may go the other way, further away from kits.
[14:00:47] <FinboySlick> I'd have done better doing my own out of particle board and acme screws.
[14:00:51] <zeehero> FinboySlick: I've got gobs of components, like seven or eight salvaged steppers, and bunches of raw material.
[14:01:11] <archivist> zeehero, my first was from "scrap"
[14:01:42] <archivist> I keep adding and modding it
[14:01:56] <andypugh> On my current conversion I have been having castings made in iron, just to do the job "right"
[14:02:27] <zeehero> archivist: Yeah? Is that a common way to get into this hobby? I mean, I know I've got to get the electronic hardware yet but I prefer learning on the job and completing a project even if it fails to actually do what I aimed for it to do.
[14:02:37] <archivist> I made a new axis a couple of weeks ago for mine
[14:02:38] <FinboySlick> andypugh: Custom cast parts? Were they big?
[14:02:46] <andypugh> I maybe ought to do a YouTube "Tour" of the machine now that it is pretty much done.
[14:03:00] * FinboySlick interested in watching it.
[14:03:08] <zeehero> "Well I screwed this up, might as well keep going and see what this screw-up means to a finished machine." with safety goggles and a fire extinguisher handy
[14:03:45] <FinboySlick> zeehero: I think the most common way is getting a conventional mill or lathe on the cheap and converting it.
[14:04:06] <zeehero> Did that with my 3D printer and I learned how to print ABS without a heated bed so it seems to work for me.
[14:04:12] <FinboySlick> But for cheapo builds, building from scratch can be easier if you do it right.
[14:04:33] <zeehero> Hmm, I've read about manual mills a bit, are they really just a bunch of wheels to spin to move it by hand with the spindle going?
[14:04:43] <archivist> zeehero, I had an axis with too much friction (too little bearing area) so turned an axis 90 deg and made a new one on top instead of the small axis
[14:04:51] <mevon> zeehero: you use ABS plumbing and melted it in aceton?
[14:05:15] <zeehero> mevon: hmm? No, I don't do that.
[14:05:17] <andypugh> FinboySlick: The red parts here: https://picasaweb.google.com/lh/photo/15RdNsAOqS5YQYhRS5zPltMTjNZETYmyPJy0liipFm0?feat=directlink and here: https://picasaweb.google.com/lh/photo/7v3gpOZHcTunB0JRbsAT3dMTjNZETYmyPJy0liipFm0?feat=directlink and also in the Z-axis assembly here: https://picasaweb.google.com/lh/photo/KZ74w9eyFZzsWCbjBZy5eNMTjNZETYmyPJy0liipFm0?feat=directlink
[14:05:17] <FinboySlick> zeehero: They're often a bit more complex than CNC needs to be since cnc can interpolate a lot of the stuff you need special features for in a conventional mill.
[14:05:38] <mevon> zeehero: how do you solve the warping/
[14:05:43] <mevon> ?
[14:05:48] <FinboySlick> andypugh: Now that I see 'em, I remember you pasted those a while back actually.
[14:06:04] <zeehero> mevon: I make all my own models, I solve it trhough special consideration in the designs themselves.
[14:06:19] <zeehero> You don't need a heated bed if you make the model right.
[14:07:08] <zeehero> But since everyone gets their stuff from each other online and only a handful make their own - I'm not surprised people look for a mechanical solution to the problem.
[14:07:09] <mevon> zeehero: on what type of surface do you print?
[14:07:09] <andypugh> kwallace: Did you try linuxcnc.mdi() in Python?
[14:07:18] <zeehero> mevon: blue tape on particle board
[14:08:43] <zeehero> Nothing special
[14:09:23] <kwallace> andypugh: No, I'm still trying to figure out what is available for creating motion in LinuxCNC.
[14:09:33] <zeehero> alright, thanks for the advice guys, see you around
[14:09:54] <archivist> and lurk in the channel !
[14:10:13] <andypugh> All I have spotted in Python is the linuxcnc.mdi approach, but I am pretty sure you should be able to send an NML command
[14:10:37] <kwallace> andypugh: I'm trying to absorb this: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?PythonBindings
[14:12:06] <andypugh> That is 4 years old, things have moved on
[14:12:21] <andypugh> Though not necessarily in that direction :-)
[14:16:39] <kwallace> I have used linuxcnc.status from here: http://www.linuxcnc.org/docs/html/common/python-interface.html#_tt_linuxcnc_command_tt_attributes but didn't look far enough to see the linuxcnc.command bits.
[14:17:00] <andypugh> kwallace: If you are looking to write probe routines in Python then I think it might just be easiest to use linuxcnc.mdi("G38.2") and then read back the values from linuxcnc.probed_position()
[14:20:18] <kwallace> I think that is the plan so far, but I wanted to see if there was anything else available. I have had projects where I get most of the way through and someone says "Why didn't you do it this way?".
[14:23:10] <andypugh> It is definitely worth asking MAH if he knows of a way to start a probe from inside Pythin.
[14:37:31] <andypugh> In the WEE skip at work today: 12 male-female pairs of 4-pole 1S Lemo connectors rated at 10A. They aren't in the skip any more.
[14:41:13] <WalterN> any of you guys have experience doing something like this? http://www.sandvik.coromant.com/en-us/knowledge/milling/application_overview/holes_and_cavities/circular_ramping/Pages/default.aspx
[14:42:49] <andypugh> Yes, but probably not in the sense they are describing
[14:43:29] <WalterN> well
[14:43:57] <WalterN> we are trying to drill a 1.5" hole... the way its set up right now is a pain in the butt
[14:43:58] <andypugh> I htink that the counterbore.py code produces code to do it, even: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Simple_LinuxCNC_G-Code_Generators#Counterbore_Software
[14:44:24] <WalterN> in 1018 steel
[14:45:42] <jepler_> In v2.5 and later, you can write a multi-turn helical mill as a single g2 or g3. Specify P- when doing more than one full turn (e.g., P2 to do more than one but not more than two full turns)
[14:46:01] <jepler_> but selecting feeds and speeds and tooling and coolant .. that's all beyond me
[14:47:55] <WalterN> I think its supposed to run dry and blow the chips out with air
[14:48:50] <andypugh> Sounds ambitious.
[14:49:49] <andypugh> One think I noticed at MPM is that even a company making things for money runs machines a lot slower than YouTube vidoes trying to sell inserts..
[14:50:47] <WalterN> MPM?
[14:51:09] <andypugh> Stuart Stevenson's factory
[14:57:17] <WalterN> herm
[14:58:04] <WalterN> I have an RA390-019O10L-11L CoroMill 390 thing
[14:58:12] <kwallace2> MPM -> http://www.wallacecompany.com/tmp/img_2110-1a.jpg
[14:58:17] <WalterN> its just using coolant right now
[14:58:58] <WalterN> and the Expensive inserts dont last long :-x
[14:59:34] <andypugh> Some inserts don't like coolant. I have heard
[15:04:12] <JT_Shop> helical milling holes is tough on tooling
[15:06:46] <andypugh> Can't you use a big twist-drill?
[15:07:23] <kwallace2> andypugh: Do you remember who the guy in the plaid shirt is? http://www.wallacecompany.com/tmp/img_2111-1a.jpg
[15:07:41] <andypugh> That's CaptHindsight isn't it?
[15:09:48] <kwallace2> I have no idea, but he always had something to say.
[15:10:11] <kwallace2> always had something interesting to say
[15:10:46] <kwallace2> Oops.
[15:11:04] <andypugh> Maybe the chap in question can confirm or deny my allegation.
[15:11:05] <CaptHindsight> was I blabbing again?
[15:12:55] <kwallace2> Is this you here? http://www.wallacecompany.com/tmp/img_2111-1a.jpg
[15:14:04] <WalterN> andypugh: we do... its just that it needs a good finish
[15:14:36] <WalterN> using a 1.25" drill and then that coromill to finish it off at 1.5"
[15:14:51] <WalterN> http://www.ebay.com/itm/Narex-BT-40-Adjustable-Drill-Coolant-Inducer-SDA8-060M-SDH6-1-50R-2-43T-/171151256928?pt=LH_DefaultDomain_0&hash=item27d968ed60
[15:16:12] <andypugh> I have a lot of these, but nothing to turn them with :-/
[15:16:48] <WalterN> andypugh: do you have a BT40 one of those?
[15:17:11] <andypugh> My machine is BT30, and the coolant is a 1960s trickle.
[15:17:20] <WalterN> heh
[15:17:31] <WalterN> I'm looking for a BT40 one of those
[15:17:58] <kwallace2> Maybe another shot of interest: http://www.wallacecompany.com/tmp/img_2129-1b.jpg Pile-up on poor Seb.
[15:18:41] <cradek> looks like I had the good sense to be anywhere else
[15:19:50] <cradek> er no, I think I'm hiding behind the plant
[15:20:07] <kwallace2> I think was just before the lynch mob came and dragged you out?
[15:21:21] <andypugh> WalterN: Not cheap: http://www.ebay.co.uk/itm/200573884722?pt=UK_Home_Garden_PowerTools_SM&hash=item2eb3229932
[15:22:02] <cradek> kwallace2: which one were you? did we meet?
[15:22:10] <cradek> surely we did...
[15:23:05] <kwallace2> I'm a vampire, I don't show up in pictures.
[15:23:24] <andypugh> Not the ones you take, anyway.
[15:23:54] <kwallace2> I came with Rogge, John and Jason from Tormach.
[15:24:05] <WalterN> andypugh: how does the coolant/air connect to it?
[15:24:06] <cradek> ah
[15:24:18] <cradek> I think I probably saw you a few times then, but maybe we never talked
[15:24:49] <andypugh> WalterN: No Idea. Anyway, what was wrong with the one you showed me the link for? That was BT40
[15:24:50] <WalterN> andypugh: there is a stub there off to the side, but is that like a pipe thread or something?
[15:25:06] <WalterN> well
[15:25:11] <WalterN> I'm looking at this one... http://www.ebay.com/itm/Nikken-Tool-Holder-Coolant-Inducer-CAT-40-/171132352223?pt=BI_Tool_Work_Holding&hash=item27d84876df
[15:25:49] <andypugh> I think you have a hole with an O-ring mounted on the machine
[15:26:01] <WalterN> hmm
[15:26:55] <WalterN> I'll look at it once the part is done
[15:27:03] <andypugh> It doesn't look like rocket-science to make one.
[15:27:38] <WalterN> we are really limited right now with capabilities as a startup company
[15:29:17] <WalterN> we'll see
[15:31:01] <kwallace2> Cool, my eBay VFD and Digikey stuff just arrived.
[15:31:07] <JT_Shop> WalterN, one way that works well is to drill a hole bigger than the endmill and start at the center with the endmill
[15:31:50] <WalterN> JT_Shop: to put a nice 1.502" +-0.002" hole?
[15:31:59] <andypugh> WalterN: http://www.cftsystems.com/images/literature/cft-innovations-brochure.pdf shows one on a machine on page 2
[15:34:13] <WalterN> andypugh: ooo thanks
[15:34:15] <JT_Shop> WalterN, I guess that depends on your machine if the final hole is nice or not
[15:37:04] <WalterN> JT_Shop: if it was me I'd probably drill a 5/8 or 7/8 hole then hollow out most of the rest of it with a 1" cob roughing endmill
[15:37:36] <WalterN> like this http://www.mscdirect.com/product/06822043
[15:37:44] <andypugh> I would use a boring head. :-)
[15:38:18] <andypugh> But only because I have a nice boring head that I enjoy using
[15:38:22] <WalterN> then something like that for the finish pass
[15:46:56] <WalterN> ordering pizza
[15:49:37] <JT_Shop> I'll be right over
[16:04:24] <tjb1> Hello all.
[16:17:53] <JT_Shop> hi
[16:21:17] <Tom_itx> afternoon
[16:26:48] <_DJ_> gn8
[16:42:29] <andypugh> Wonder what the reserve is? http://www.ebay.co.uk/itm/Cnc-8-Position-Lathe-Turret-/321230396649
[17:06:56] <mevon> getting tired of these RTAI errors...
[17:07:40] <andypugh> Switch to Xenomia? :-)
[17:08:46] <mevon> port parport0 claim failed
[17:09:03] <andypugh> That's not an RTAI error
[17:09:24] <andypugh> you probably need to remove the lp module
[17:09:44] <andypugh> First try sudo modprobe lp (I think) and try LinuxCNC again
[17:10:03] <andypugh> If that works then you probably need to blacklist lp
[17:10:31] <mevon> just after " config string '0x378 out ' "
[17:10:35] <mevon> ok ill try that
[17:10:59] <andypugh> Err, no, you can't remove lp from hal.
[17:11:17] <andypugh> You have to do it from the command line before starting LinuxCNC
[17:12:39] <mevon> blacklist then?
[17:13:02] <andypugh> Sorry, you need a Linux geek to explain that bit.
[17:13:51] <andypugh> http://askubuntu.com/questions/134266/how-do-i-prevent-the-lp-module-from-loading-on-boot
[17:14:00] <mevon> :S yeah thats what i was reading
[17:14:03] <andypugh> But make sure that removing it actually helps...
[17:16:42] <mevon> http://www.linuxcnc.org/index.php/english/forum/49-basic-configuration/26684-problem-with-paraler-port
[17:18:15] <mevon> works now
[17:23:22] <mevon> note to self: disable spindle when booting, cheap chinese board will make it run 2x
[17:24:40] <mevon> hummm funny
[17:24:53] <mevon> now quitting linuxcnc turns the spindle on
[17:28:30] <mevon> could it be a bios config? as in EP+LP or just EP?
[17:30:14] <andypugh> The parallel port will do strange things when not being controlled by anything
[17:30:28] <PCW> control line states might be affected but for things like spindle control you really want a charge pump if using a parallel port
[17:33:11] <andypugh> Goodnight folks
[17:34:46] <mevon> bye andy thanks for everything
[17:36:08] <Jp11> Anyone controlling a kbic with a 7i76?
[17:39:10] <Jp11> Specifically speed control via analog
[17:56:53] <MacGalempsy> evening everyone
[17:59:25] <mevon> hello
[17:59:26] <MacGalempsy> so last night, I was able to lable and category all the connections to the Benchman XT mainboard and atc controller. still have a few items to determine what they are.
[18:00:19] <mevon> heres an easy one, I hit the homing for a said axis, and instead of going towards x=0, it goes the opposite and never reaches home
[18:00:29] <mevon> can someone help me with homing?
[18:00:54] <mevon> is it in the homing accel where I need to make it negative?
[18:02:25] <MacGalempsy> what side it your switch on?
[18:02:57] <jthornton> negate the search and latch
[18:02:59] <mevon> got 2 actually but on the same input
[18:03:22] <jthornton> it should home to either switch
[18:03:26] <MacGalempsy> anyone ever seen an encoder with 10 wires coming out?
[18:03:59] <jthornton> I think mine do counting the shield and ground
[18:04:30] <MacGalempsy> i figured one of the extra is ground. what is shield?
[18:06:56] <mevon> what is "home switch active before start of latch move"?
[18:09:37] <mevon> lets say I have limit switches at both ends, one is the home, how do I set it in the config?
[18:09:59] <mevon> Home + Max?
[18:10:22] <mevon> or only Min + Max (Both in configs)
[18:16:39] <mevon> so anyone? what is better to have? a Min switch or Home switch?
[18:17:00] <jdh> might as well make it boh.
[18:17:24] <mevon> have you ever tried that?
[18:17:35] <jdh> yes
[18:17:46] <mevon> me its what I have and it doesnt work
[18:17:53] <mevon> did work for you?
[18:18:01] <jdh> works fine
[18:18:32] <jdh> my router has min/max wired to a single input and it homes to min
[18:18:58] <mevon> but in the machine.ini you have, how is it set?
[18:19:10] <mevon> home or Min?
[18:20:09] <mevon> it gives me limit switch errors
[18:20:31] <jdh> do you have HOME_IGNORE_LIMITS = YES for each axis?
[18:20:40] <jdh> are your inputs inverted?
[18:20:46] <mevon> inverted yes
[18:20:56] <mevon> ignore limits im not sure
[18:21:14] <mevon> its at YES
[18:22:06] <mevon> min is at -0.01 and home at 0.0, if min is home switch too it wont work
[18:22:27] <mevon> so no home switch
[18:22:30] <jdh> what is the msg and what are you doing when it is generated. You might pastebin your ini/hal
[18:23:20] <jdh> I have home at +0.1, min_limit 0.0
[18:25:33] <mevon> well im trying to home
[18:25:45] <mevon> and set my limit switches correctly
[18:26:44] <mevon> i have min and max switches on the axis, when I press home axis button i get an error message
[18:26:55] <jdh> immediatly?
[18:26:59] <mevon> yes
[18:27:12] <mevon> immediatly when it reaches the switch
[18:27:32] <jdh> try making HOME slightly positive?
[18:27:54] <jdh> or not, I guess having MIN negative is the same thing.
[18:43:22] <PetefromTn> Is it a bad thing that I have not run the VMC for over two months now and I am actually kinda scared to run it due to being rusty LOL
[18:45:08] <mevon> "joint 0 on limit switch error"
[18:45:23] <mevon> when I home axis 0
[18:46:57] <mevon> anyone can help me to set my limit switches
[18:47:15] <mevon> i cannot home properly
[18:47:31] <MacGalempsy> did you go back through the wiring diagram and check all the connections?
[18:47:47] <mevon> all my switches are working properly
[18:47:56] <MacGalempsy> so did you go back through the software?
[18:48:23] <mevon> .hal and .ini, yeah I checked everything
[18:48:47] <MacGalempsy> when you pulse the motors, does the axis move in the correct direction?
[18:48:53] <mevon> yes
[18:49:06] <mevon> i had to invert the dir pins
[18:49:36] <mevon> also negate the home velocity
[18:49:36] <MacGalempsy> are you pulsing it manually or through the software?
[18:49:51] <mevon> im pulsing with the Home Axis button
[18:49:55] <mevon> in linuxCNC
[18:50:48] <MacGalempsy> it sound like a software issue.
[18:51:11] <mevon> so you are going to help me configure my switches corerctly?
[18:51:48] <MacGalempsy> i have not gotten to that point, I am still retrofitting electronics on my machine
[18:51:55] <mevon> oh
[18:52:05] <MacGalempsy> so all I can do is give ideas and you will have to do the reading
[18:52:24] <MacGalempsy> perhaps the forums and user manual will work
[18:53:50] <mevon> hummm HOME_IS_SHARED
[18:56:22] <mevon> sucks because i had all this working but lost my backup when reinstalling linuxCNC
[18:56:47] <mevon> how fcukin newb am i
[18:57:42] <mevon> wish andypugh was here :S\
[18:57:54] <mevon> hed put some lead in my head
[18:58:03] <mevon> shotgun style
[19:00:51] <PetefromTn> You can't home your machine then
[19:02:55] <mevon> PetefromTn: it homes but gives me an error when done
[19:02:56] <PetefromTn> Just reading thru here again and you said it says joint 0 on limit switch error. Does that mean the switch is already tripped maybe?
[19:03:19] <mevon> got Min and Max sw on my axis
[19:03:38] <mevon> whats the best way to configurate the switches for Homing at Min switche?
[19:03:41] <PetefromTn> sounds like my machine. There are several aspects to homing the axis.
[19:04:01] <PetefromTn> Gimme a second to re-read the literature for linux homing.
[19:05:21] <PetefromTn> Could it be your home index position is beyond the switch somehow?
[19:05:28] <mevon> what is best to keep? Home or Min sw?
[19:06:00] <PetefromTn> Not sure what you mean are you using your min limit as your home switch too?
[19:06:08] <mevon> my Home is at 0 and Min at -0.01
[19:06:30] <PetefromTn> are you using a home index position?
[19:06:41] <mevon> offset?
[19:06:49] <PetefromTn> yeah thats what I mean.
[19:06:50] <mevon> I dont have an Indexer
[19:07:03] <PetefromTn> no offset position.
[19:07:20] <PetefromTn> sorry for the confusion.
[19:07:44] <mevon> nor a potentiometer of any sort giving the position
[19:07:53] <mevon> just a min and max sw
[19:08:02] <mevon> i wish to use min as home
[19:08:12] <PetefromTn> When you home the machine does it travel slow to the home switch, hit it, then back off and stop at a home offset position
[19:08:24] <mevon> yes
[19:08:47] <PetefromTn> Okay what I am asking you is if your home offset position is where it needs to be.
[19:09:00] <mevon> then the limit error comes
[19:09:09] <mevon> and turns off the machine
[19:09:26] <PetefromTn> Here you need to read this entirely to understand homing.
[19:09:30] <PetefromTn> http://www.linuxcnc.org/docs/2.4/html/config_ini_homing.html
[19:10:05] <PetefromTn> Is this your X axis?
[19:10:27] <mevon> read it 5xone year ago, read it 2xjust today
[19:10:31] <mevon> thanks for the help anyways
[19:10:37] <mevon> afk
[19:10:48] <PetefromTn> You might try changing the homing order to see if it gets beyond the Y axis
[19:11:05] <PetefromTn> I kinda need more information to help you.
[19:11:13] <PetefromTn> I am NO expert tho.
[19:13:00] <PetefromTn> I had a lot of issues with homing when I first got my VMC configured and it is very easy to get errors with the values being wrong.
[19:16:46] <PetefromTn> mevon: Hey man do you have Home ignore limits set to yes?
[19:17:36] <PetefromTn> also do you use an index pulse to home to once the physical switch is tripped like on my machine?
[19:19:04] <PetefromTn> Is this thing on LOL?
[20:19:56] <Tom_itx> PetefromTn, no cnc jobs to run?
[20:20:28] <PetefromTn> Nope not so far...just some small one offs and odds and ends.
[20:26:14] <PetefromTn> Tom_itx: Have you been making anything cool lately?
[20:26:27] <jesseg> Hey, do you know if there is a metric sister to "Nema" motor size standards? I'm trying to find a DC motor size with 50mm or 49.875mm between bolts (square pattern.)
[20:31:12] <PetefromTn> Nema 23 is 1.856 inches or 47.14...
[20:35:26] <CaptHindsight> http://www.piclist.com/techref/io/stepper/nemasizes.htm
[20:36:04] <CaptHindsight> PetefromTn: yes for the Bolt Hole Distance
[20:36:25] <PetefromTn> CaptHindsight: yes what?
[20:36:31] <jesseg> The motor I need must be a Nema 23.75 :P
[20:36:52] <PetefromTn> Do you have a specific mount?
[20:36:53] <jesseg> it's a bit bigger than a nema 23, but way smaller than a 34
[20:37:18] <jesseg> Four holes in a square pattern, 50mm or 49.875mm between near corners
[20:37:30] <jesseg> I'll probably have to make an adapter
[20:37:42] <PetefromTn> Is there a circular boss area inside it?
[20:37:50] <jesseg> for centering? Yes.
[20:38:04] <jesseg> Oh. The old motor has. But the mount doesn't use it.
[20:38:27] <jesseg> I was just hoping that there was a metric equiv of standardized motor sizes like nema but metric based ;)
[20:38:58] <CaptHindsight> sounds like it's not a standard size
[20:39:26] <jesseg> It's an old German made 5.5x5 foot mylar CNC cutter thing. Made in Hamburg. The motors are 5-phase stepper motors but I want DC motors
[20:40:16] <PetefromTn> You might be able to make an adapter that turns the motor 45 degrees
[20:41:28] <jesseg> I don't know. I can see some German engineers sitting around a table saying "Hmmph. Let's make the holes 50mm apart, in a square. ya. ya. gutensize." haha
[20:41:57] <jesseg> but yes I'll probably have to make an adapter.
[20:42:08] <PetefromTn> Can you weld up the holes and redrill them?
[20:43:43] <CaptHindsight> looks like there is a nema24
[20:43:46] <jesseg> It would probably be easier to just do like you said and make an adapter plate.
[20:44:07] <jesseg> I also need a metric shaft..
[20:44:08] <jesseg> =D
[20:46:09] <MacGalempsy> alright. the encoders are 8 wire
[20:46:21] <CaptHindsight> yeah it's a nema 24
[20:46:25] <MacGalempsy> they just used a 10 plug cable
[20:46:36] <CaptHindsight> http://www.stepperonline.com/images/drawing/drawing-24HS22-2006S.jpg
[20:46:49] <MacGalempsy> but need to run out. will catch everyone in an hour, or so
[20:48:46] <jesseg> Hmm. Nema 24 is supposed to be 2.4 inches square.
[20:50:12] <CaptHindsight> 60mm sq = 2.362"
[20:50:29] <jesseg> Hmm.
[20:50:39] <PetefromTn> http://img.diytrade.com/cdimg/1268547/14621258/0/1283428768/Nema_24_Stepper_Motors.jpg
[20:50:47] <jesseg> thanks
[20:50:49] <PetefromTn> sounds like capn is right. Nema 24
[20:51:18] <CaptHindsight> never noticed the odd size before
[20:52:22] <jesseg> I left my calipers at my shop but the motor does seem to be 2 & 3/8 outside - which is 60.325mm -- so I'll bet you are right
[20:52:42] <CaptHindsight> jesseg: and you want to find a brushless DC equivalent?
[20:52:54] <jesseg> Brushed would be better
[20:53:01] <jesseg> but brushless would be acceptable :P
[20:54:30] <jesseg> Hmm. That nema 24 diagram shows a 10mm shaft it looks like...?
[20:54:37] <CaptHindsight> http://www.fastechcn.com/productcon.asp?id=697
[20:55:02] <jesseg> I need a 4 or 5 or maybe 6 mm shaft. (I measured it but forgot what it was, but it was an integer mm shaft.)
[20:57:09] <jesseg> That one has 8mm shaft it looks like
[20:57:32] <PetefromTn> you can buy couplers with different sized shaft collars of course..
[20:57:57] <PetefromTn> http://www.leadshine.com/productdetail.aspx?type=products&category=easy-servo-products&productype=easy-servo-motors&series=ES-M&model=ES-M22430
[20:59:19] <jesseg> I wouldn't want to know the price on that stepper
[20:59:28] <PetefromTn> its a servo..
[20:59:34] <jesseg> It's both :-)
[20:59:47] <jesseg> At least it calls it both.
[21:00:00] <jesseg> No reason a stepper with an encoder can't operate like a servo :)
[21:00:07] <PetefromTn> yeah sorry you are correct.
[21:00:08] <jdh> no torque
[21:00:18] <jesseg> jdh, huh?
[21:00:35] <PetefromTn> 425 oz in in a nema 24 isn't too shabby methinks.
[21:00:51] <jdh> they have no high speed torque. They are just steppers with feedback
[21:01:33] <jesseg> Years ago I did an interesting experiment. I attached the encoder from an old inkjet printer to the back of a stepper from a laser printer (Perhaps a nema 34.)
[21:01:45] <CaptHindsight> what speed and torque do you need?
[21:01:49] <PetefromTn> Not sure the application here but its probably not too big a deal.
[21:02:25] <jesseg> Then I made a driver circuit controlled by a PIC micro to run it as a brushless DC motor. It ran great!
[21:02:53] <jesseg> No particularly outstanding speed or torque. I'm toying with the idea of just putting encoders on the steppers and using those.
[21:03:29] <PetefromTn> Is this a milling machine?
[21:03:49] <jesseg> Anyway, running the stepper as a brushless motor worked so well. I was able to program the PIC to advance the timing above a certain speed, so at low speeds it had full torque (and lots of it) and above a certain speed it actually ran at 180 degrees of advance..
[21:04:05] <jesseg> PetefromTn, more light duty than a milling machine.
[21:04:25] <PetefromTn> I'd probably just use some quality steppers then and be done with it.
[21:05:31] <jesseg> This sort of thing: http://b.goistatic.com/data/auctions/Auction16801/Dana_ByUID/3214223.jpg
[21:05:34] <CaptHindsight> brushed DC motors are easy to find as well
[21:06:02] <CaptHindsight> flatbed cheese slicer?
[21:06:08] <jesseg> I do intend to use it for 3D milling of styrofoam
[21:06:14] <jesseg> LOL sure.
[21:06:23] <jesseg> It can cut out patterns in thin material
[21:06:25] <PetefromTn> Looks like it has zero Z..
[21:06:51] <jesseg> The head had a solenoid that would raise/lower the cutter, and a servo to set the direction
[21:07:09] <PetefromTn> is it a drag knife machine?
[21:07:15] <jesseg> yeah
[21:07:39] <jesseg> with a 0.0002 inch resolution (encoder separate from motor, but in same gear train.)
[21:07:50] <PetefromTn> cool..you can make some cool stuff with it. I'd probably install a High speed spindle to do engraving work.
[21:08:08] <jesseg> exactly.. over a 5x5.5 foot area
[21:09:19] <jdh> that's a lotta area
[21:09:39] <jesseg> yeah
[21:10:56] <jesseg> well thanks very much for your help guys!
[21:11:29] <jesseg> At least I have a shot at a nema 24 motor.. if I can find one on ebay. It's a personal project so it can't cost big buckaroos
[21:11:38] <jesseg> but now I know what to lurk for on ebay..!
[21:12:17] <PetefromTn> Good luck dude!!
[21:12:42] <jesseg> thanks!
[21:29:45] <kwallace> Today's fun:http://wallacecompany.com/tmp/img_1463-1a.jpg http://wallacecompany.com/tmp/img_1464-1a.jpg http://wallacecompany.com/tmp/img_1466-1a.jpg http://wallacecompany.com/tmp/img_1468-1a.jpg
[21:32:08] <somenewguy> some people get all the fun toys
[21:32:34] <jdh> nice, have your run one?
[21:32:41] <somenewguy> glad I am notthe only one who lays out "totally temporary" electronics rigs on plywood
[21:33:19] <jdh> he didn't even splurge on real plywood!
[21:33:51] <jdh> even looks like my wiring. Assuming there are no wire labels.
[21:33:52] <somenewguy> mine is partical boardtoo
[21:33:56] <somenewguy> but reinforced of course
[21:34:14] <somenewguy> with concrete residue cause it used to be a form from when I built my grill lol
[21:34:26] <somenewguy> I like the din rail tho, adds a pro touch
[21:34:37] <jdh> yeah, could use some panduit
[21:34:54] <somenewguy> does a mid sizedmill like that havea technical name tho? looks pretty perfect for me, esp the simple drainage
[21:35:24] <kwallace> I wanted to get everything working before I committed to a real equipment box.
[21:35:25] <jdh> "tormach"
[21:35:50] <jdh> any idea what lead time for a new tormach is?
[21:35:50] <kwallace> It's the little one, 770
[21:36:35] <jdh> new?
[21:37:19] <kwallace> I have no idea. This one was here in a week.
[21:37:54] <somenewguy> oh cool
[21:38:02] <somenewguy> only ever heard of torchmate, never actually looked at the product lines
[21:38:20] <jdh> tormach
[21:43:52] <somenewguy> wait
[21:43:53] <somenewguy> really?
[21:44:00] <somenewguy> are those two different companies
[21:44:07] <somenewguy> or have I been reading it wrong this whole timme
[21:44:31] <skunkworks_> kwallace: I forget - are you getting one of the beta lathes?
[21:44:37] <skunkworks_> * or got..
[21:44:44] <kwallace> Tormach and Torchmate are different
[21:46:06] <kwallace> No, I don't get a lathe. It's getting wrapped up. We're working on the mill now.
[21:47:29] <skunkworks_> cool - more wizard type screens?
[21:47:45] <kwallace> Yes.
[21:48:11] <skunkworks_> Nice work! that should really help get some of the tormach userbase to linuxcnc
[21:50:10] <kwallace> I'm anxious to get what we have released, but not about some of the feedback we might get. :)
[22:03:39] <jdh> I'd like a Tormach for work, but pretty much nothing in my job requires a mill.