#linuxcnc | Logs for 2012-11-16

[00:00:15] <mevon> http://embeddedfreak.wordpress.com/2008/08/12/using-gnu-screen-to-debug-your-serial-port/
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[00:40:18] <JT-Shop> http://jamesriser.com/Magic/HeavyRiserStageAndStreetCups.pdf
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[00:45:31] <TekniQue> nice work
[00:45:36] <TekniQue> what are those cups used for?
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[00:47:03] <JT-Shop> stealing money from unsuspecting people or for a street show
[00:49:54] <TekniQue> I keep wanting to try spinning bellmouths on stainless and aluminium pipe ends on my lathe
[00:50:09] <Tom_itx> do you have to anneal that partway thru the spinning process?
[00:50:17] <JT-Shop> yes
[00:50:32] <Tom_itx> just torch it while it's still on the lathe?
[00:50:52] <ReadError> is that yours JT-Shop ?
[00:51:03] <JT-Shop> the link?
[00:51:05] <JT-Shop> no
[00:53:35] <Tom_itx> early on, i bet it makes you wonder if it will ever turn out
[00:53:56] <ReadError> they look good
[00:55:23] <andypugh> I have done some metal spinning. It's a lot of fun.
[00:55:44] <andypugh> I made some brass oil-tank ends and an acetylene reservoir.
[00:56:34] <andypugh> I needed to anneal the brass multiple times, and I was only turning up a 1/2" lip.
[00:57:16] <JT-Shop> could you feel it getting harder as you spun the part?
[00:57:40] <andypugh> Yes, then it cracks and splits, flies off and attacks you.
[00:58:45] <JT-Shop> so just before it attacks you take it out and anneal it?
[00:59:14] <andypugh> That seems to be the trick :-)
[00:59:37] <Tom_itx> you wanna catch it before the stress cracks show up
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[01:02:20] <JT-Shop> http://www.youtube.com/watch?v=Z0R6n6APMuU
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[01:07:00] <Tom_itx> I wonder what rpm is used
[01:07:40] <JT-Shop> the ones I saw spinning outdoor light covers was moving right along
[01:07:54] <JT-Shop> they were CNC metal spinners
[01:09:00] <TekniQue> 00:55:44 < andypugh> I made some brass oil-tank ends and an acetylene reservoir.
[01:09:07] <TekniQue> acetylene reservoir sounds dangerous
[01:09:33] <andypugh> No, not really. For a motorcycle lighting set.
[01:09:47] <TekniQue> what's that?
[01:10:02] <TekniQue> a headlight?
[01:10:06] <TekniQue> gas headlight?
[01:10:16] <andypugh> Yes, gas headlight and tail-light
[01:10:52] <JT-Shop> pump it up more for a stop light?
[01:11:05] <andypugh> http://en.wikipedia.org/wiki/Carbide_lamp
[01:11:32] <JT-Shop> lol, yes I know what they are, I'm just pulling your leg
[01:12:08] <tjb1> Oh that time has come for Wikipedia...
[01:12:33] <andypugh> I had an idea for a rotating shutter powered by convection, and a cable-stopper to make acetylene powered indicators. :-)
[01:12:43] <JT-Shop> cool
[01:15:12] <andypugh> I have a couple of carbide cave lights, still very much a current product: http://www.petzl.com/files/all/technical-notice/headlamps/E50%20Ariane%20E50500-02%20030402.pdf
[01:20:30] <tjb1> andypugh: how much light do these give off?
[01:21:30] <andypugh> A huge amount. In all directions. Much more pleasant to cave with than an electric light, you can look around with your eyeballs, not your head.
[01:22:02] <andypugh> Defnitely my preferred caving light source, but a bit frowned upon nowadays.
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[01:24:03] <ds3> where does one buy carbide for those lamps?
[01:24:37] <andypugh> Caving shops, vintage vehicle suppliers.
[01:28:24] <andypugh> Anyway, enough of this. Goodnight
[01:28:35] <tjb1> bye andypugh
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[02:09:47] <tjb1> Anyone know how many computers you can use a Sheetcam TNG license on?
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[02:31:11] <L84Supper> tjb1: my guess is at least one :)
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[02:31:21] <tjb1> I would hope so :)
[02:33:15] <L84Supper> I've never seen that CAM package before
[02:34:20] <tjb1> Well its either that or UniGraphics…I couldnt decide
[02:36:19] <L84Supper> NX is great
[02:37:05] <tjb1> $189 vs $100k :P
[02:37:20] <L84Supper> tough call
[02:38:20] <tjb1> How difficult is it to learn vs mastercam/solidworks/autocad?
[02:38:35] <mutilator> i think its impossible
[02:38:41] <L84Supper> NX is similar to solidworks
[02:39:14] <tjb1> Our school apparently cant afford it…I never heard of it until an employer at the job fair asked if I knew it
[02:39:24] <L84Supper> I've used autodesk inventor but never really used autocad
[02:39:30] <tjb1> I hate inventor
[02:39:48] <tjb1> What do you use for 2d drawings or do you do everything in the parametric programs?
[02:39:56] <L84Supper> NX is more powerful than solidworks
[02:40:08] <tjb1> I know
[02:40:12] <tjb1> Its cad/cam in 1 package
[02:40:13] <L84Supper> I pretty much use NX and Solidworks
[02:40:46] <L84Supper> I've used ProE/ Creo as well
[02:41:10] <L84Supper> the industrial designers tend to like Creo
[02:41:12] <tjb1> What do you think is the best?
[02:41:22] <L84Supper> NX
[02:42:04] <tjb1> I wish I could play with it
[02:42:08] <L84Supper> then either Solidworks or Creo based on preferences
[02:44:56] <tjb1> just like solidworks…~$150 for a year
[02:45:29] <L84Supper> Student Edition?
[02:45:38] <tjb1> Yes
[02:45:41] <r00t4rd3d> lol
[02:45:59] <tjb1> Yes r00t4rd3d I know the alternatives...
[02:49:37] <L84Supper> Solidedge is another
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[07:24:51] <Loetmichel> mornin'
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[07:32:41] <Loetmichel> soooo... just talked to the boss: granted me the mainboard P6tWS pro and the I7 - 2,66ghz that htt been spare ... i will pay with overtime hrs... now i have just to sort out the 12GB ram issue... and then i have a fat new PC for @ home
[07:32:51] <mazafaka> Loetmichel: http://www.youtube.com/watch?feature=player_embedded&v=je4qV7fsVvU&gl=RU
[07:34:14] <mazafaka> http://cs307304.userapi.com/v307304406/2797/sc3dEvddt68.jpg
[07:36:13] <mazafaka> Loetmichel: for what will you use such a powerful PC? I need one for FEM calculations and 3D drawing...
[07:36:26] <Loetmichel> gaming, wat else
[07:37:03] <Loetmichel> have even ordered a GT650TI graphics board and a 2tb HDD to go with it ;-)
[07:40:00] <mazafaka> you're already adult, how can you play on PC?
[07:41:43] <mazafaka> Loetmichel: I myself plan to buy and RC trophy car for about 750 USD, but I know it is waste of time, because I will not be capable to walk the dog playing this thing, my dog hardly becomes tired from my cycling...
[07:43:18] <Jymmm> mazafaka: Try riding a NON stationary bike, then the dog might =)
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[07:44:12] <mazafaka> Jymmm: i ride like in a link above, http://a.d-cd.net/681e6u-960.jpg
[07:44:27] <DJ9DJ> moin
[07:47:42] <Jymmm> mazafaka: It was a joke.
[07:50:20] <mazafaka> I know
[07:52:24] <DJ9DJ> good night Jymmm & mazafaka
[07:52:24] <mazafaka> I finally close to my idea of using bikes and such, but I do not want any action cams anymore. It was funny to use BMX with only front brake on ice, but usual MTB with low seat is even a better rig for having fun.
[07:54:50] <mazafaka> I am waiting to by such thingies to put it under the car and it will keep it from falling while I will work with the car. Then there will be some details for lifting of the suspension, and some reworking of the wheel arcs, then there will be a roll cage.
[07:55:09] <mazafaka> I am talking about a real car, not RC car :)/
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[08:47:55] <Loetmichel> MarkusBec: because i have saved me my inner childhood ;-)
[08:49:37] <Jymmm> Loetmichel: too bad you lost your adulthood =)
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[09:04:52] <Loetmichel> Jymmm: i never had one
[09:04:59] <Loetmichel> :-)
[09:05:17] <Loetmichel> ia am a 43 year old child ;-)
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[09:06:02] <Loetmichel> .... and proud of it!
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[10:06:52] <mrsun> using a countersink (90 degree) for milling 45 degree angles on the side of stuff ? :P
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[11:48:26] <MattyMatt> mrsun, why not it it's sharp enough?
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[13:01:57] <mrsun> http://www.ctctools.biz/servlet/the-630/45-DEGREE-INDEXABLE-CHAMFER/Detail or use one of those
[13:02:04] <mrsun> i dont get it why the mechmate people doesnt do that? :P
[13:02:09] <mrsun> insted of grinding it
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[13:02:23] <mrsun> its not expensive either
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[15:57:08] <JT-Shop> http://www.youtube.com/watch?v=5MtX5M0AQFs
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[15:59:49] <tjb1> Watching Modern Marvels makes me realize how much money we waste...
[16:00:06] <tjb1> Pardoning turkeys, sending them to disney world and then to live out their lives in a special farm?
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[16:08:03] <skunkworks> https://www.youtube.com/user/brusspup/videos?view=0
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[16:10:40] <sliptonic> JT-Shop: Do you mind if I ask how you did the estop circuit on your bridgeport conversion?
[16:10:41] <skunkworks> https://www.youtube.com/watch?v=hP4ai7dZXIo
[16:11:46] <skunkworks> sliptonic: I used example 4 - http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Sample_HAL_And_ClassicLadder
[16:12:20] <skunkworks> You can do the same thing with the estop hal component..
[16:13:43] <sliptonic> Cool. That's the kind of page I've been hunting for. Thanks.
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[16:20:25] <JT-Shop> sliptonic: that is on my todo list... I do have the estop connected on the CHNC
[16:21:13] <sliptonic> skunkworks: Is that the estop_latch component?
[16:24:49] <skunkworks> yes
[16:25:26] <skunkworks> I played with it when someone had a question - I seems to act the same as example 4 (so you would not have to use classic ladder)
[16:25:42] <skunkworks> I need classic ladder so it really didn't matter to me
[16:26:56] <sliptonic> I've waded into that before and probably will again but I'm trying to get as much working through pncconf as I can before I go there.
[16:28:47] <JT-Shop> sliptonic: http://linuxcnc.org/index.php/english/forum/search?q=estop_latch&childforums=1
[16:29:09] <JT-Shop> I knew I remember doing that for a machine but it wasn't mine it is a customers machine
[16:30:00] <JT-Shop> tjb1: did you test out the all in one homing/limit thing?
[16:30:14] <tjb1> Not yet, im gonna go out and try that soon
[16:30:39] <skunkworks> ah - it was jt :)
[16:31:51] <tjb1> Im waiting for it to get a little warmer outside
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[16:43:47] <tjb1> Well its 45 out now, I suppose I can go out :)
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[16:55:57] <awallin> hmm this is aparrently quite new... http://www.youtube.com/watch?feature=player_embedded&v=39jFRUYRYYw
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[17:02:58] <tjb1> I wonder how many people died trying to find the rock in Devil's Pool that pretty much keeps you from getting sucked off the edge.
[17:05:00] <pcw_home> awallin: pretty sure thats LinuxCNC
[17:05:57] <awallin> the rapids aren't set to "wow" mode clearly... :)
[17:06:25] <cradek> well css works...
[17:07:24] <awallin> if they would sell their mill with iso30 taper I could consider it - I guess they offer linuxcnc on the mills too?
[17:08:43] <JT-Shop> sliptonic: I have the estop hooked up now :)
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[17:09:27] <Aero-Tec> the lathe looks nice
[17:09:41] <Aero-Tec> but looks like it will be costly
[17:09:58] <Aero-Tec> any idea the target price for it?
[17:10:41] <cradek> seeing the tap cycle I'm 100% sure it's linuxcnc. kind of weird they don't say it.
[17:11:23] <awallin> this one has been advertized in digital machinist... would be nice also.. https://www.machinetoolswarehouse.com/xcart/catalog/MD001-CNC-p-16346.html
[17:11:27] <Aero-Tec> I know mach can not do rigid taping
[17:12:21] <archivist> mack fails at turned threads too :)
[17:13:20] <roh> heh.. toolchangers.. i was thinking about buying this one
[17:13:21] <cradek> outside turning here: http://www.youtube.com/watch?v=A_PSg0p0oYA
[17:13:22] <roh> http://www.schultheis-shop.de/index.php?cat=c66_Werkzeugwechsler-Werkzeugwechsler.html
[17:13:33] <roh> any comments about something like that?
[17:13:52] <JT-Shop> they used a center drill for a spotting dril
[17:13:53] <roh> as in.. is it worth the money/any problems you could see with it?
[17:14:42] <awallin> roh: how does the gripper work on that one?
[17:15:14] <roh> awallin: you push the lever up to unlock, and use it downwards as usually on a drill press
[17:15:18] <cradek> http://www.tormach.com/blog/tormach-cnc-lathe-prototype-fall-2012-update/
[17:15:45] <roh> http://www.youtube.com/watch?v=q_0c2E3J4bg thats a video of it in use
[17:15:47] <sliptonic> JT-Shop: You're faster than I but I imagine you hand edited files. I'm trying to use pncconf.
[17:16:14] <JT-Shop> I just copied and pasted the code from the forum and changed the input to match :)
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[17:16:31] <roh> awallin: its a exchange part for the quill
[17:16:37] <roh> if i translated that correctly..
[17:16:41] <awallin> roh: and how does the position of the tool stay at constant z when you push down the quill?
[17:17:22] <JT-Shop> sliptonic: what does pncconf do when you specificy an external estop input?
[17:17:22] <roh> awallin: for milling one fixes it in the 0 position
[17:17:53] <roh> but having a quill is really nice, even on a mill i must say...
[17:18:08] <skunkworks> http://www.cnczone.com/forums/showthread.php?p=1196407#post1196407
[17:18:48] <skunkworks> I am not saying it...
[17:19:25] <awallin> huh? they don't have rigid tapping on the mills??
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[17:21:35] <skunkworks> mach through printer port...
[17:22:03] <skunkworks> they have setups for linuxcnc - but no spindle encoder yet.
[17:22:10] <skunkworks> iirc
[17:22:29] <sliptonic> JT-Shop: http://pastebin.com/EtcUd9zG
[17:22:39] <skunkworks> rogge from tormach was on the dev channel discussing the lathe and stuff
[17:22:47] <skunkworks> few months ago
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[17:24:45] <roh> wow. nice lathe... expecially the puller
[17:24:58] <roh> s/expecially/especially/g
[17:26:26] <skunkworks> http://psha.org.ru/irc/%23emc-devel/2012-08-15.html#16:07:40
[17:31:14] <cradek> that one guy in that conversation sounds just like me. I agree with everything he says.
[17:31:46] <tjb1_> hey JT-Shop, that isnt working. Telling me pin 'limit' does not exist
[17:33:39] <tjb1_> http://pastebin.com/qxKxTMqC
[17:34:20] <jthornton> typo
[17:35:27] <tjb1_> I found my fat fingers
[17:35:29] <tjb1_> :(
[17:37:30] <tjb1_> Its not picking up limits with that
[17:41:21] <pcw_home> Wheres the smart editor that says "no such symbol 'limit' in line 33
[17:42:35] <pcw_home> "
[17:45:35] <mrsun_> hmm i wonder how to make reliable corner joints for 40x80mm tubing ...
[17:45:45] <mrsun_> i want the table of my mill disassembleable =)
[17:45:56] <tjb1_> What command will tell me the address of a new parallel port? "laspci -v" is just telling me where the I/O ports are but I remember another command that told me the new par port was 778 I think
[17:46:18] tjb1_ is now known as tjb1
[17:49:47] <archivist> ew Lindsey books shutting down/retiring http://blog.makezine.com/2012/11/12/lindsays-technical-books-ships-last-catalog/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+makezineonline+%28MAKE%29
[17:49:50] <pcw_home> Can't you just specify parallel port 0 and parallel port 1 and let Linux.LinuxCNC deal with the addresses?
[17:50:38] <tjb1> Wouldnt I need to add the second in the hal? with the 0x378 out
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[17:51:45] <pcw_home> I have not done it but indexes (0,1,2,3) are supposed to work
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[17:57:52] <IchGuckLive> hi all
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[17:58:07] <IchGuckLive> Aero-Tec: i got the diles
[17:58:10] <IchGuckLive> files
[17:58:35] <Aero-Tec> cool
[17:58:41] <Aero-Tec> how do they look?
[17:58:49] <IchGuckLive> good
[17:58:54] <Aero-Tec> cool
[17:58:56] <Aero-Tec> thanks
[18:02:45] <IchGuckLive> what is on your pyvcp only the rpm
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[18:12:23] <Aero-Tec> it is the standard screen
[18:12:41] <Aero-Tec> what ever the live cd does
[18:12:54] <Aero-Tec> I have not changed it any yet
[18:13:06] <sliptonic> pcw_home: can the estop_latch component be made to work through pncconf without editing the main .hal file?
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[18:14:58] <andypugh> That would have to be a question for ChrisM I think.
[18:16:01] <sliptonic> Sorry. Not here? I'll check back.
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[18:23:00] <pcw_home> Yeah thats a question for Chris M but I don't thinks Hes much of a IRCer
[18:23:02] <pcw_home> I would ask in the pncconf section of the forum
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[18:35:31] <JT-Shop> tjb1: http://linuxcnc.org/docs/html/examples/pci_parallel_port.html
[18:35:40] * JT-Shop heads to town
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[18:46:16] <IchGuckLive> did you check Machine/Show HAL Configuration if all the parport pins are there
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[18:57:09] <Dolence> hi!
[18:57:55] <Dolence> guys, anyone tried to control one of these cheap chinese VFDs via modbus?
[18:58:51] <IchGuckLive> Dolence: it works on the mesacard perfect
[18:59:14] <IchGuckLive> in standard VFD controll mode at the spindel interface from the 7i76
[19:00:41] <Dolence> whats a mesacard?
[19:02:20] <IchGuckLive> http://www.mesanet.com/
[19:02:48] <IchGuckLive> Dolence: woudt you like to do it from the parport
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[19:04:40] <pcw_home> I know some drives can be driven by the modbus component (GS2?) but it might need some customization for your particular drive. Also I think there is a more generic modbus component that has just been added to Master
[19:04:42] <Dolence> i was thinking in using modbus (serial port)
[19:09:52] <pcw_home> I think the mb2hal driver should work with the right setup and assuming you have good enough specs. Heres an example mb2hal ini file:
[19:09:54] <pcw_home> http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=src/hal/user_comps/mb2hal/mb2hal_HOWTO.ini;h=98103cd5b0f124eaa2ec085d2d72cee30aaa333d;hb=725822cac8f621c40c7c6105fb1a845eca335705
[19:12:48] <Dolence> what you mean by good enough specs? PC specs, like cpu clock and ram?
[19:16:32] <pcw_home> No good enough modbus register specs for the VFD to be able to control it
[19:17:18] <Dolence> I see, good documentation
[19:17:20] <pcw_home> (and proper modbus implementation, thats an issue sometime as well)
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[19:18:23] <Dolence> so a dac to 0-10v interface could be a better solution?
[19:22:58] <tjb1> Oh goody, my torch fires when you remove power from the box!
[19:23:02] <tjb1> Just want I wanted!
[19:26:10] <pcw_home> Dolence I dont know, the modbus thing is worth a try if you dont mind using master
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[19:28:41] <IchGuckLive> im off By
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[19:34:11] <Dolence> pcw_home i think it's too much to deal for me, I could do it, but with my limited skills it would take a while
[19:34:49] <Dolence> maybe doing it via parallel port and a 0-10v interface could be a faster solution
[19:40:37] <pcw_home> You would be a trail blazer using modbus with a new drive, on the other hand it would probably help others with the same drive (and the guy that wrote the driver is often on the LinuxCNC forum so is likely available to help)
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[19:45:31] <tjb1> Ive unhooked nearly everything, torch still starts when g540 loses power
[19:47:59] <kwallace> Dolence: Have you seen this yet? : http://wiki.linuxcnc.org/cgi-bin/wiki.pl?VFD_Modbus
[19:50:52] <pcw_home> You probably need to torch to be enabled by the chargepump
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[19:58:27] <Dolence> kwallace yes, I was reading this doc right now... I will control vfd manually while I do some experiments with modbus
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[19:58:33] <mevon> hi everyone, just wondering is it normal that when a limit switch is tripped, the whole machine goes offline?
[19:58:52] <mevon> have to hit f1+f2 again to get it back
[20:01:48] <pcw_home> I would guess that hitting the hard limits in normal operation is serious fault
[20:03:29] <kwallace> mevon: The hardware limits are considered an e-stop condition. Setting up the soft limits just inside of the hardware limits is the standard practice and keeps the machine in a normalish state, but you may need to click an override button to jog off the soft limit.
[20:06:59] <mevon> ok thanks ill consider that, but i cannot seem to find the over ride button
[20:08:18] <JT-Shop> sliptonic: I answered your question on the forum
[20:09:03] <kwallace> I recall it being close to the spindle control buttons in manual mode.
[20:09:16] <tjb1> JT-Shop: Gecko thinks my G540 is damaged, its activating outputs without charge pump, e-stop on, no db25 and it does this when power is removed from it
[20:09:55] <kwallace> The check box may not show up if your .ini file isn't set up for soft limits.
[20:12:06] <kwallace> tjb1: Just in case, there is a charge pump override jumper in the G540 which may keep it enabled whenever power is applied.
[20:15:53] <tjb1> kwallace: Its in fault mode, i unplug it and it activates the outputs
[20:17:06] <pcw_home> Sure sounds like the chargepump is busted (to use a technical term)
[20:18:42] <kwallace> tjb1: Okay, just checking. Also just in case: http://wallacecompany.com/machine_shop/G540/
[20:19:11] <tjb1> kwallace: What am I looking for there?
[20:20:11] <tjb1> Ive looked all over it hoping I screwed up...
[20:20:24] <tjb1> One wire for arc start going to the output and the other going to the G540 power supply ground
[20:21:01] <tjb1> I can come into LinuxCNC and do M3 and turn it on and M5 to turn it off, I unplug power supply for G540 and the plasma cutter turns on
[20:21:12] <pcw_home> Are these OPTO coupler outputs?
[20:21:16] <kwallace> tjb1: These are just part of my notes on getting the charge pump working with a parallel port.
[20:21:47] <awallin> tjb1: that sounds like grounding-problems that optocoupling might solve..
[20:22:56] <tjb1> It worked before this exact same way
[20:23:11] <tjb1> Ill send it in next month once im done with my presentation
[20:24:03] <awallin> a design where the power-stage of something turns on when you cut the power to the control/logic part is not very sound...
[20:26:29] <tjb1> It has to be something I did…its turning on with another parallel port
[20:28:36] <pcw_home> I thought you said it still enabled the outputs at power off even with no DB25 from host
[20:31:19] <pcw_home> If thats the case (and the chargepump is enabled) Thats probably a bad G540
[20:31:48] <Aero-Tec> just to make sure I am getting things right
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[20:32:14] <Aero-Tec> touch off from fixture keep the DRO 0ed
[20:32:28] <Aero-Tec> and is used for setting up tool table
[20:33:15] <Aero-Tec> and touch off from work is for setting the work offsets?
[20:33:21] <Aero-Tec> is that right?
[20:34:01] <Aero-Tec> still working with my lathe
[20:35:14] <tjb1> pcw_home, I have two wires for the plasma cutter…when touched the torch starts. I have one hooked to a ground that all power supples share and the other to the output. Does that sound correct?
[20:36:38] <Aero-Tec> would not a relay be better?
[20:37:01] <Aero-Tec> it would isolate the plasma from the CNC
[20:37:44] <pcw_home> Are either of the 2 wires from the plasma torch grounded?
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[20:37:49] <Aero-Tec> plasma/ router will be the next thing made
[20:38:00] <abetusk_> um, open source eagle .brd to gerber file program?
[20:38:06] <tjb1> pcw_home: I ground one of them
[20:38:14] <abetusk_> or rather, any source on the eagle .brd or .sch file format?
[20:39:54] <Aero-Tec> tjb1: is the wire you grounded to the cnc a ground for the plasma?
[20:40:18] <pcw_home> But if you connect them to enable the plasma, one must have a power source (signal)
[20:40:20] <pcw_home> so is it possible you have signal and ground reversed?
[20:40:37] <tjb1> Ive reversed them…same thing
[20:40:51] <tjb1> Hypertherm doesnt say which wire is which…just 5 and 6 are arc start
[20:40:52] <Aero-Tec> you should disconnect the plasma wire grounded to the CNC and see if it is a plasma ground
[20:41:02] <pcw_home> are you using the G540 1Amp outputs?
[20:41:16] <tjb1> Im using the two outputs on the G540
[20:41:19] <tjb1> Ive tried both outputs
[20:41:32] <tjb1> Aero-Tec: The plasma ground isnt hooked to the table at the moment, it did it with it connected also
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[20:42:04] <pcw_home> the G540 has high current outputs and TTL outputs, which are you using?
[20:42:40] <tjb1> I only see 2 outputs
[20:42:47] <tjb1> Pin 17 and 1
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[20:43:22] <Aero-Tec> why not a relay?
[20:43:49] <tjb1> Why should it need a relay?
[20:44:07] <Aero-Tec> would that not be the best and safest?
[20:44:53] <tjb1> It worked before fine
[20:46:36] <Aero-Tec> when I said ground I meant DC power ground and not ac power in ground
[20:46:55] <pcw_home> does it just turn on briefly when you pull the G540 plug or is it stuck on
[20:47:03] <pcw_home> ?
[20:47:47] <Aero-Tec> I would measure the volts from the plasma wires you have to the DC ground of the plasma
[20:48:08] <pcw_home> Yep this can be sorted out with a voltmemter
[20:48:11] <Aero-Tec> see what one is 0 or if they both have voltage
[20:48:37] <pcw_home> voltmeter
[20:49:57] <Aero-Tec> calling the lathe gurus
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[20:50:13] <tjb1> I hooked relay up
[20:50:31] <JT-Shop> from the hypertherm manual start plasma requires dry contact closure to activate...
[20:50:34] <tjb1> One coil wire to 12v, other coil wire to output of the G540. Ground for 12v shared to g540 ground
[20:51:04] <tjb1> NO contacts, one with 1 wire to plasma, the other with the other wire
[20:51:22] <tjb1> Plug 12v power in without G540 power, arc starts…turn g540 on and relay turns off
[20:51:41] <Aero-Tec> just wanting to check on setting things up tool table, when to use the fixture touch off and when to use the work touch off
[20:52:00] <pcw_home> sounds like the G540 is bad
[20:52:32] <JT-Shop> tjb1: I never turn on my plasma until Linuxcnc is in control
[20:52:54] <JT-Shop> or I get a pffffit from the electrode
[20:53:41] * JT-Shop wanders off
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[20:53:56] <tjb1> Guess I will grab one of these…current way of setting wiring up sucks - http://www.ebay.com/itm/OMRON-MK2P-I-DC-12V-General-Purpose-Relay-10A-With-PF083A-Socket-Base-/290739764281?pt=LH_DefaultDomain_0&hash=item43b170bc39
[21:01:13] <Aero-Tec> that should do the trick
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[21:03:28] <tjb1> Im serverly confused...
[21:03:39] <tjb1> I am using this BOB also
[21:03:40] <tjb1> http://cnc4pc.com/Tech_Docs/C10R10_WG.pdf
[21:04:00] <tjb1> When one side of coil is hooked to pin 17 in the outputs and the other is hooked to the GND, it activates relay no matter what...
[21:04:50] <tjb1> When it activates relay….pin 17 to ground shows infinite resistance
[21:05:17] <tjb1> What magic is happening...
[21:05:32] <Dolence> guys, I recently switched my old rotary tool to a spindle+vfd, now, everytime the spindle starts to spin my axis moves a little bit... I tried to ground everything
[21:05:48] <Dolence> but still giving me some kind of noise problem
[21:07:09] <Dolence> everything is grounded to a common point
[21:10:28] <kwallace> Do you have a filter on your VFD power input? It's the shiny bit here: http://www.wallacecompany.com/cnc_lathe/HNC/00024-1a.jpg . Every VFD I've installed (not that many) has needed one.
[21:12:08] <pcw_home> VFDs put ~360V squarewaves into the motor (which has maybe 500 pF capacitance to GND)
[21:12:10] <pcw_home> havoc ensues.....
[21:12:58] <tjb1> c10 outputs are different...
[21:12:59] <pcw_home> a common mode choke (giant ferrite bead) on the UVW wires helps a lot as well
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[21:14:46] <mrsun> shielded cables etc?
[21:16:03] <pcw_home> shields may help but the main issue with VFDs is the unlimited current pumped into GND via the fast rise times into the motor/gnd capacitance
[21:17:59] <Dolence> cables between vfd and mtor are not shielded
[21:21:27] <pcw_home> Good frame GND on VFD is important too
[21:22:54] <pcw_home> so the high frequency return current loop between the VFD and motor is as short as possible
[21:23:04] <Dolence> solved!
[21:23:16] <Dolence> serial port ground wasnt grounded on driver
[21:23:26] <Dolence> it's an old driver, bad stuff
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[21:50:23] <tjb1> Can you type multiple lines on one line in axis mdi and have them do it
[21:50:25] <tjb1> Like
[21:50:34] <tjb1> "M3 S1, p4, m5"
[21:54:52] <sliptonic> JT-Shop: Thanks. Estop working now.
[22:01:47] <andypugh> abetusk: You might want to hope that djdelorie sees your question
[22:02:04] <djdelorie> what?
[22:02:21] * djdelorie checks logs...
[22:03:42] <andypugh> Hmm, actually, I don't know why you sprang to mind. I got confused between Eagle and GEDA
[22:03:52] <djdelorie> I don't use eagle, so I don't know... there might have been some efforts in that direction, but certainly, the easiest way to get gerbers out of eagle is to run eagle :-)
[22:04:09] <djdelorie> we do have a desire to migrate eagle design files to geda though
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[22:07:33] <andypugh> JT-Shop: You recall that dividing head I was looking at on eBay? I just got back from collecting it.
[22:07:52] <andypugh> It seems rather solid.
[22:08:17] <archivist> where what....
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[22:09:14] <mrsun> will have to go and buy materials on monday =)
[22:09:16] <mrsun> yeey
[22:09:17] <mrsun> expensive :P
[22:09:19] <andypugh> One of these: http://www.chronos.ltd.uk/acatalog/Engineering_Menu_Vertex_Dividing_Heads_90.html
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[22:10:18] <pfred1> I have to give geda another try
[22:10:23] <archivist> I have a vertex, but not that model
[22:10:50] <mrsun> hmm how to measure long lengths to quite accurate distances .. :/
[22:11:03] <andypugh> Taper-roller bearing spindle sounds like a great advance on my nasty rotary table
[22:11:19] <archivist> but only 40-1
[22:11:34] <andypugh> I will put a servo on it anyway.
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[22:11:49] <andypugh> mrsun: laser interferometry
[22:11:54] <mrsun> ough
[22:12:22] <andypugh> laser time-of-flight is good for distances over 100m or so.
[22:12:30] <archivist> andypugh, watch for backlash, I only rotate one direction normally
[22:12:37] <mrsun> andypugh, ok not that long
[22:12:42] <mrsun> was thinking more 1.5 meters :P
[22:13:03] <archivist> lots of J blocks
[22:13:37] <andypugh> mrsun: http://www.ebay.co.uk/itm/190744612617
[22:14:24] <mrsun> heh =)
[22:14:33] <archivist> I have a vernier does few feet
[22:14:50] <andypugh> What's the budget?
[22:14:55] <mrsun> no budget :(
[22:15:01] <DJ9DJ> gn8
[22:15:03] <mrsun> just want my tubing cut to the right length :P
[22:15:21] <archivist> roller and encoder
[22:15:32] <andypugh> A good tape-measure will get you 0.05%
[22:16:31] <archivist> cnc band saws have encoders, grip metal and move it with a leadscrew
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[22:17:03] <andypugh> Marking _on_ the lines is always more accurate. Bear in mind that a conventional vernier works on the principle that you can spot a misalignment of 0.05mm with the naked eye.
[22:17:29] <andypugh> There is no magic in a vernier, just a line everywhere you need one.
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[22:18:23] <archivist> I must take pics of this vernier... it is different, has pegs in holes, uses the hole spacing difference in the slider v frame
[22:19:04] <archivist> so digital vernier to 4 ft at every 1/4 inch
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[22:22:43] <mrsun> i guess that the tubing length is the least problem tho ... corner joints without welding will be a fun one also :P
[22:25:39] <andypugh> Aero-Tec: Typically I touch-off the "master" tool (my favourite turning and facing tool) into G54, and then touch-off the other tools into the tool-table. That means that the tool-table contains the offsets from Tool1.
[22:26:08] <andypugh> Then, if I touch-off any other tool to the work into G54, everything else moves (correctly).
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[23:04:16] <tjb1> Bad news for the arduino sampling torch voltage…its picking up the noise also
[23:04:22] <tjb1> so I am going to try to average it
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[23:08:39] <roh> tjb1: can#t you filter it out?
[23:09:00] <tjb1> Im going to try to average the last 5 or more inputs
[23:09:51] <roh> try putting some resistor in series with your adc line and put some small cap from the adc in to gnd
[23:10:10] <tjb1> adc?
[23:10:23] <roh> analog in of the arduino
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[23:10:58] <roh> so.. signal -> resistor (10k) -> one side of the cap and arduino input
[23:11:32] <roh> and gnd -> other side of the cap. 10nF should be enough
[23:11:51] <roh> how fast/often do you sample?
[23:11:54] <tjb1> Doubt I have a 10k resistor or a 10nf cap
[23:12:00] <tjb1> as fast as arduino runs
[23:12:21] <roh> how fast do you need it to react? a low-pass obviously slows the slope
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[23:13:21] <tjb1> decently fast
[23:16:08] <tjb1> lets see if I remember how to check caps with my multimeter...
[23:17:28] <tjb1> all I have is .1 and 1 uF
[23:18:52] <andypugh> ten 0.1 in series ?
[23:19:09] <PCW> 1K and 1uF is 1 ms time constant which should be plenty fast
[23:19:13] <tjb1> I got like 3 of them
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[23:19:58] <andypugh> 1uF SMT 0804. What voltage are those likely to be? Presumably very low?
[23:20:28] <tjb1> My cap says 1uF 50v
[23:20:50] <tjb1> So I can do the above with 1uF and 1k?
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[23:21:36] <roh> try it out
[23:23:29] <PCW> 1 mS time constant 159Hz bandwidth should be OK
[23:24:10] <tjb1> So voltage divider output -> resistor -> one leg of cap -> same leg of cap to analog input
[23:24:14] <tjb1> other leg of cap to ground
[23:27:56] <tjb1> I cant get it to print the real damn voltage…hold on
[23:28:04] <tjb1> Too much math for arduino >:(
[23:28:33] <tjb1> Too hard for little arduino - realVoltage = (((tip*(5/1023)*(7000))/5000)*50);
[23:28:59] <tjb1> It doesnt like the 5/1023 or the .004887585
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[23:29:50] <andypugh> 5.0 / 1023.0
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[23:30:51] <andypugh> What you have will be done as integer maths, and the first 5/1023 will be zero.
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[23:40:36] <tjb1> This list looks pretty good
[23:40:36] <tjb1> http://pastebin.com/qmhMVTKK
[23:40:46] <tjb1> Yes the top voltage is really the low…the torch needs moved up quite a bit
[23:40:53] <tjb1> top = tip
[23:41:22] <tjb1> Thats also using a software average of 15 values
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[23:43:02] <tjb1> Im guessing the ~40 values are values stuck in the list from the high pierce
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[23:49:07] <L84Supper> I just got back from www.automationtechnologiesinc.com (aka Keling) the guy that runs it has Phd in Mech Eng for the UIC
[23:54:33] <roh> tjb1: arduinos do fixed point math. no fpu in there
[23:55:16] <s1dev> roh: I haven't seen any of the conversation at all but floating point can be implemented in software
[23:55:32] <roh> also.. what resistor values is your voltage divider? depending how that one works you will need no or a different resistor in front of the cap
[23:56:08] <roh> s1dev: sure. but on an avr nobody does that. you simply explain the little critter your problem in fixed point math
[23:56:09] <tjb1> 2k/5k
[23:56:21] <s1dev> anyone have an opinion of the small benchtop Grizzly lathes?
[23:56:24] <s1dev> roh true lol
[23:56:32] <roh> tjb1: so you measure something like 7V max?
[23:56:36] <tjb1> yes
[23:56:53] <tjb1> tip voltage was not 30…its 90…arduino isnt getting something right
[23:57:27] <andypugh> tjb1: You need to change the order then, do the multiplies first. That 5/1023 will make the result always zero
[23:57:32] <roh> well.. i dunno what internal resistance an avr has... but the 1k shouldn load the circuit that much
[23:57:50] <tjb1> andypugh: Its not even printing the first value correctly
[23:58:25] <jdh> do the a/d counts look reasonable?
[23:59:02] <tjb1> It should be 263 out of 1023 and its giving me like 50-100
[23:59:34] <tjb1> If my math is right…1.8 in before voltage divider, 1.286 coming out of divider into arduino, 1.286/(5/1023)
[23:59:45] <roh> do something like "voltage in mV = adc * 6.83593"