#emc | Logs for 2011-03-29

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[03:34:14] <Guest275> Q: if a stepper has a holding torque of 2800 oz-in and a 24 tpi leadscrew, what is the pressure in psi at the face of the nut, an area of 2.8 in2?
[03:35:51] <Guest275> ...or rather the pressure exerted at the face of the nut. Its for a type of stepper based press.
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[03:39:46] <Guest275> or if car has torque x, what is y pressure at front bumper
[03:43:26] <Valen> work out the force on the nut
[03:43:37] <Valen> is rotational force * gradient
[03:43:49] <Valen> divide that by your area
[04:08:36] <Guest275> gradient?
[04:12:13] <Valen> of the screw
[04:15:20] <Guest275> ah, force applied to a wedge. i woulda never thunk that
[04:20:45] <Guest275> thanks
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[07:19:06] <anonimasu> can I power the mesa boards from different power sources?
[07:19:16] <anonimasu> as long as I keep the grounds the same?
[07:19:43] <Jymmm> the 5v source you mean?
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[07:44:57] <anonimasu> yeah
[07:48:31] <Jymmm> Someone said you could use the UCB port for a 5v tap, but *I* don't know for sure.
[07:48:36] <Jymmm> USB
[07:49:07] <mhaberler> yes you can - kill a cable, black = ground red = +5v
[07:49:36] <Jymmm> Eh, dont trust a cut cord. grab a meter to be sure.
[07:50:10] <Jymmm> http://www.geocities.ws/k7hkl_arv/PC_USB_Connectors_Pinout.png
[07:50:28] <mhaberler> the last thing the world hears before a giant boom is an engineer's voice saying 'this is techncally impossible'
[07:51:06] <Jymmm> Nah, it's "YOU DID WA... KA BOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOM!"
[07:53:30] <mhaberler> like so? http://mah.priv.at/gallery2/main.php?g2_itemId=35479
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[08:01:46] <nullie> usb is just 100 mA
[08:01:58] <nullie> if you don't provide any device on this end
[08:02:08] <mhaberler> no, up to 500mA
[08:02:19] <nullie> up to 500 mA if you have some slave
[08:03:28] <mhaberler> really the slave should tell the host how much it needs so the host can turn it off if it draws too much; but most hosts will happily supply 500mA without that
[08:07:20] <anonimasu> but I need aux power for a board
[08:07:31] <anonimasu> for the plasma thc
[08:08:26] <mhaberler> why would you want to power the mesa board differently - they get power via PCI?
[08:08:48] <anonimasu> -_-
[08:08:55] <anonimasu> my plamsa is not inside my cabinet
[08:09:04] <anonimasu> and I dont want to send hv hf signals around
[08:09:12] <anonimasu> with a cable in a shop over the floor
[08:12:37] <mhaberler> skunkworks: please note change in http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?ToolchangerProtocolProposal and http://git.linuxcnc.org/gitweb?p=emc2.git;a=commit;h=5e246a3a73c0399124744042c6a6410480fa4896 - this will affect your requested start-change feature
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[11:06:19] <lilalinux> where can I find information on gcode for a tool length measurement switch?
[11:07:21] <mhaberler> http://git.linuxcnc.org/gitweb?p=emc2.git;a=blob;f=nc_files/tool-length-probe.ngc;h=8b41233d2afe19ef6b9f17706108d0eb356f066b;hb=f3ee6715b9b4599cc8f953001c4ab9e6ea251ca8
[11:12:50] <lilalinux> thank you
[11:19:45] <lilalinux> can I automatically force a tool length measurement, when a T occurs?
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[11:31:36] <newbynobi> hallo mhaberler, ich bin es, der penible deutsche Bug Detector des fix-m61-candidate.
[11:32:01] <mhaberler> oh, mit Künstlernamen!
[11:32:27] <mhaberler> passt der letzte branch so circa?
[11:32:38] <newbynobi> Na, da das mein erster Versuch ist, wusste ich nicht, wie man das genau macht.
[11:32:59] <mhaberler> meinst mit merge? wennst willst steuer ich da durch
[11:33:14] <newbynobi> Den letzten Branch habe ich noch nicht instlliert, da werde ich mich heute Nacht eventuell mal ran setzen.
[11:33:46] <newbynobi> Ne, ich meinte IRC, das ist neu für mich.
[11:33:52] <mhaberler> aja
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[11:41:30] <mhaberler> lilalinux: this will be possible with the gcode-procedure based toolchange which is in master, but not yet documented
[11:42:09] <mhaberler> if you're ok building from master, do that and try emc owordm6-ui.ini in configs/sim - this should get you an idea
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[11:47:21] <bzzzz> \:D/
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[12:30:18] <lilalinux> mhaberler: danke
[12:30:27] <mhaberler> ok
[12:31:08] <lilalinux> gar nicht gemerkt, dass deutsch hier amtssprache ist :-)
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[12:42:27] <mhaberler> neuadinx, und russisch für die Forschungsabteilung
[12:50:07] <alex_joni> lilalinux: naja, nicht so richtig
[12:50:15] <alex_joni> nur inoffiziell
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[13:45:54] <JT-Shop> does deweys subroutine utube have sound? http://www.youtube.com/watch?v=Bn8T5Fw0ISs
[13:46:29] <mhaberler> no
[13:46:47] <JT-Shop> darn
[13:50:14] <Jymmm> JT-Shop: What, you want Britnney Spears or something?
[13:52:23] <JT-Shop> heh
[13:54:29] <Jymmm> Ppl waited two days in line yo get into her free concert here that only lasted one hour.
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[14:08:55] <newbynobi> Hallo mhaberler, ich habe zwar noch kein "merge" gemacht, aber ich habe die paar Dateien einzelnd runter geladen und in mein Verzeichnis eingefügt. Anschließend neu kompiliert und gestartet. Dein owordm6-ui-ini habe ich geladen und erst einmal ein M61Q3 ausprobiert. Das funktioniert, nun habe ich ein T4M6 ausgeführt, auch das geht, aber sollten nach dem tool-change nicht die prepare Parameter wieder auf Null gesetzt werden?
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[14:10:19] <mhaberler> hm, warum - wenn das ein random toolchanger ist, bleibt das Karussel ja in der prepare position stehen auch nach dem Tausch?
[14:10:37] <mhaberler> vielleicht sollten wir englisch reden -- mehr feedback
[14:10:52] <cradek> agreed!
[14:11:29] <cradek> a random toolchanger setup remembers which tool is in the spindle automatically
[14:12:55] <newbynobi> Ok, for a random tool changer leaving the tool-prepare parameters with the actual value may make sense, but for an ordinary rack tool changer not. I see the main problem that the user will see the tool prepare parameters in the gladevcp panel, but making an m6 will not result in a change, but in an error.
[14:13:02] <mhaberler> we were discussing wether a m6 complete should clear the prepared-* pararameters; I dont think so, a random tc will remain in the prepared posn
[14:13:39] <mhaberler> in a rack tc the prepare is pretty much a noop
[14:13:58] <mhaberler> it all happens in the m6 when the spindle moves to the rack position
[14:14:25] <cradek> I think after m6 you should assume nothing about the state (like that the carousel does not move)
[14:14:26] <mhaberler> a noop in terms of determining a carousel positon or causing movement
[14:14:45] <cradek> the interp wants a new prepare before every m6 - are you suggesting that be changed too?
[14:15:46] <mhaberler> I dont think so; the changer positioning arithmetic will all be in M6_COMMAND in his case methinks
[14:16:08] <newbynobi> I just loocked in Hal Show, there the parameters in iocontrol.0.tool-prepare are cleared, but not in the glade panel.
[14:16:09] <cradek> I agree
[14:17:08] <mhaberler> you dont like the diital-out-xxx or analog-out-xx pin, you change it as you like and makes sense for your tc
[14:17:40] <mhaberler> I was happy to get ANX demo for this stuff going, nevermind driving it an iron like norberts correctly..
[14:17:51] <mhaberler> ANY that is
[14:18:14] <mhaberler> working examples will be sucked in no time ;´flat;-)
[14:18:23] <newbynobi> I just tested clearing the glade values out of G-Code, it works, so everbody can handle it like he likes.
[14:18:52] <mhaberler> yes, A loong rope for the integrator to hang himself
[14:19:40] <newbynobi> Please not, just wait a wile, because the integration is not finished jet.
[14:20:05] <mhaberler> at six o'clock in the shop, then
[14:21:45] <mhaberler> norbert - if you're ok with reading C, look at http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?RackToolChanger - this is a very specific rack toolchanger
[14:22:31] <mhaberler> I looked at it wether it's worth carrying forward but I think the procedure-based toolchange is much more flexible, so I hoped somebody would come up with an example..
[14:25:45] <newbynobi> I tried to understand this before, but it was to complicated for me, so I searched for other solutions, like realising the stuff with an own comp file. With the developed axis_move.comp (with many help) it is possible to move an axis and EMC2 will not take any notice of it. This was the way I tried to move the axis during an tool change. But I do like your way much more.
[14:26:26] <mhaberler> hm, axis_comp, interesting
[14:26:38] <mhaberler> yours?
[14:26:40] <skunkworks> newbynobi: is this file anywhere? I would be interested in how you did it for a pallet change...
[14:26:54] <mhaberler> aha, the sharks are circling...
[14:28:41] <mhaberler> norbert: we are sitting on needles ;-)
[14:29:41] <skunkworks> heh
[14:29:46] <newbynobi> Sorry I am new with IRC so I just mailed the corresponing files to mhaberler, the can be found also in Peters CNC Ecke , I will give you a link in a while.
[14:29:54] <mhaberler> may I post them?
[14:30:05] <newbynobi> shure
[14:33:55] <mhaberler> skunkworks: axismove.comp + axismove_man.txt in http://emc.mah.priv.at/public/
[14:35:18] <skunkworks> newbynobi: mhaberler: cool - thanks a bunch!
[14:35:29] <newbynobi> here is the link : http://www.cncecke.de/forum/showthread.php?p=586788#post586788 but I think you must register before being able to read the thread
[14:35:35] <newbynobi> you are welcome
[14:36:48] <skunkworks> Right now - I can only do a pallet change in manual control. This will allow me to do it in gcode. (the table has to move to each end of travel to do the pallet swap) I am using mdi commands in the ini file at the moment
[14:37:23] <newbynobi> I will need the comp file also, because I must go over the soft limits during tool change cycle. Or does anyone know a way to disable the soft limits for a while during a tool change.
[14:37:24] <skunkworks> http://www.youtube.com/user/samcoinc#p/u/8/CYA5uEwLSTA
[14:38:39] <cradek> you can't use gcode commands to exceed soft limits
[14:40:47] <newbynobi> And there will be ether a possibility to change the limits from gcode, or does anyone have an idear
[14:41:33] <Jymmm> skunkworks: WTH, you have multiple beds?
[14:41:48] <newbynobi> shunkworks, your shop looks really well organised ;-))
[14:41:49] <skunkworks> multible pallets
[14:42:07] <Jymmm> whatever
[14:42:14] <skunkworks> newbynobi: flat-surface-itis ;)
[14:42:33] <Jymmm> skunkworks: what are you going to do when you finally finish it?
[14:43:01] <Jymmm> besides be bored
[14:43:51] <mhaberler> newbynobi: I assume your code is so good you can just extend the limits and never bang into the toolchanger ;-)
[14:44:01] <skunkworks> Jymmm: I have a bunch of stuff I have been putting off because it has been down. Now I have been doing a bunch of r&d while testing the k&t - it has been working really well.
[14:44:36] <Jymmm> skunkworks: ah
[14:44:38] <skunkworks> Jymmm: we also have a large nc lathe we need to convert.
[14:45:14] <Jymmm> skunkworks: Sure, but are you going to do anythign with them? Sounds like you're having more fun making them than using them
[14:45:33] <skunkworks> both
[14:45:45] <skunkworks> the thing is a easy dream to use now
[14:46:01] <Jymmm> you're going to make coin holders, huh
[14:46:30] <newbynobi> Mine may be, but what about the code of others. Meanwhile I protect the tool changer with a limit switch. I will disconnect it during tool change.
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[15:15:42] <anonimasu> how much would you people quote to machine a mold for 250x20mm with a shitload of 0.01 tolerances?
[15:16:16] <anonimasu> in acetal
[15:19:24] <archivist> x hours for machining, another x hours to get it right
[15:20:06] <anonimasu> seems like about 3 hours of cutting time
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[15:20:29] <cradek> .01 mm tolerance?
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[15:20:32] <archivist> only 3 hrs?
[15:20:35] <anonimasu> +/- 0.01
[15:20:43] <anonimasu> and some -0.00/+0.01
[15:20:47] <cradek> in acetal?
[15:21:07] <anonimasu> yeah
[15:21:09] <archivist> any polishing / finish requirements too
[15:21:40] <archivist> is the material stable enough for that spec!
[15:21:43] <cradek> -0+.01mm tolerance in plastic seems impossible. how do you even measure it?
[15:21:50] <anonimasu> with my caliper :D
[15:21:54] <cradek> haha
[15:21:56] <anonimasu> which is less accurate them my mill...
[15:22:10] <cradek> what's the expansion coefficient of acetal?
[15:22:39] <archivist> what is the bending you will get on the endmill
[15:23:02] <anonimasu> it's a 10 degree sharp cutter with a 5mm shank
[15:23:14] <anonimasu> with a 0.1mm flat tip
[15:23:25] <anonimasu> the tolerance is for some flat surfaces
[15:23:46] <anonimasu> 8.5*10^-5cm/c
[15:24:30] <archivist> I would assume a remake to correct errors
[15:25:07] <archivist> and the expansion with temperature caused by machining will be a pain
[15:25:09] <psha> anonimasu: 10 degrees will give you 0.1
[15:25:12] <psha> 0.01
[15:25:19] <anonimasu> psha: I can keep that without a problem
[15:25:30] <psha> that's tolerance you need, is not it?
[15:25:34] <anonimasu> yeah
[15:25:37] <psha> so you'll definitely won't get it
[15:25:49] <anonimasu> to keep my machining area within 10 degrees?
[15:26:06] <anonimasu> for a 15 second cut
[15:26:18] <anonimasu> it's a critical fit into a mating mold
[15:26:19] <psha> to keep detail in same temperature when you'll give it away to customer ;)
[15:26:20] <archivist> whats the tolerance of the endmill too
[15:26:25] <mrsunshine__> gah i cant descide on how to design my beefy furnace :P
[15:27:35] <anonimasu> archivist: I suspect the seco inserts are pretty accurate
[15:27:49] <anonimasu> archivist: it's a square with thoose tolerances on the side
[15:27:56] <archivist> anonimasu, dont suspect anything
[15:28:31] <anonimasu> I have a suspicion i need to make the same in aluminium later..
[15:29:38] <anonimasu> archivist: want to have a peek at the drawing I have?
[15:30:03] <archivist> when I do something to a spec I make over size and adjust the gcode for the finish cut, measuring is awkward though as it has to be on the machine
[15:31:42] <anonimasu> if you can have a look...
[15:31:53] <archivist> I did and I see .02
[15:32:16] <anonimasu> im not crazy enough to quote the text at 0.01
[15:32:18] <anonimasu> :D
[15:33:31] <anonimasu> I cant measure that either
[15:34:03] <anonimasu> how much would you quote per hour of making that kind of thing?
[15:34:07] <archivist> but anyway look at the expansion of acetal with temperature and see whats possible
[15:34:23] <anonimasu> I know 0.00 is possible, I get that when I do circles as test..
[15:34:25] <anonimasu> :)
[15:34:57] <archivist> 0 on your caliper is not 0 when its at the customers temperature
[15:35:15] <anonimasu> yep
[15:35:25] <archivist> and are you compressing the plastic with the caliper
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[15:37:34] <anonimasu> well, I have ground pieces to calibrate against.. and a pretty good mitutoyo caliper
[15:38:27] <mrsunshine__> maybe cut up the sides and make it on some kind of hinges
[15:38:29] <anonimasu> the damn question is how much to quote it for..
[15:39:37] <cradek> the first question is whether to quote it - for me the answer would be no, because I don't think it's a realistic tolerance
[15:40:07] <anonimasu> and if I have no choice?
[15:40:14] <archivist> a ball part is take gross earnings for a year to get an hourly rate, you must allow for failure, so while the part may cut in 3 hours it may take 3 goes to get right
[15:40:23] <cradek> then one billion dollars :-)
[15:40:28] <anonimasu> haha
[15:40:31] <anonimasu> cradek: same please
[15:40:34] <anonimasu> sane
[15:41:07] <anonimasu> :D
[15:41:16] <cradek> seriously: in general, you quote the price where you will be happy whether you get the job or not
[15:41:24] <archivist> one can only be productive for about 50 % of time so that doubles the rate too
[15:41:37] <anonimasu> im thinking 70e/hour standard shop rate
[15:41:44] <anonimasu> as for the other stuff we do
[15:42:26] <archivist> mold work is often more costly than normal work
[15:42:47] <anonimasu> im doing a favour for someone so I cant quote the 7 hours I'd like to
[15:43:41] * anonimasu still wonders
[15:43:45] <edoctoor> Can I install emc on Ubuntu 10.10 64 bit?
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[15:44:24] <edoctoor> is it possible
[15:44:32] <cradek> in simulator mode, yes, if you build EMC yourself. for realtime, yes, if you build a realtime kernel and RTAI for that platform.
[15:44:48] <anonimasu> so, basically I can cut it within +/-0.05 and blame it on their lack of temp control when they measure..
[15:45:00] <anonimasu> :)
[15:45:09] <edoctoor> would that be hard for a ubuntu noob
[15:45:11] <cradek> anonimasu: if you hope to complete the job, you MUST ask how they will measure it and at what temperature before you start
[15:45:19] <cradek> edoctoor: yes extremely hard
[15:45:42] <anonimasu> cradek: digital caliper at +30c or something
[15:45:53] <edoctoor> Ok... I'll just use the live cd when in a emc mood
[15:46:10] <anonimasu> and creep...
[15:46:14] <anonimasu> fun fun
[15:46:14] <edoctoor> Thanks for your quick responce cradek
[15:46:28] <cradek> anonimasu: you can't validate -0+.01mm with any digital caliper
[15:46:43] <anonimasu> i know
[15:46:43] <edoctoor> Keep up the great work.. it is appreciated
[15:47:00] <archivist> anonimasu, I have machined plastic on a lathe and it was a pain moving around and warping with the temerature effects
[15:49:09] <anonimasu> the customer cant validate my measurements.
[15:49:36] <anonimasu> in any other way then with a caliper that sucks more then mine :)
[15:49:57] <cradek> then they can reject the work no matter what you do
[15:50:13] <cradek> no quote
[15:50:34] <cradek> or send the drawings back for revision before you quote
[15:54:39] <nullie> doh, I think I fried my geckodrive
[15:56:18] <Jymmm> nullie: Be honest with Marriss about it and he'll do a one-time replacement for free.
[15:58:20] <nullie> maybe it's repairable?
[15:58:36] <SWPadnos> what model of gecko?
[15:58:40] <nullie> g540
[15:58:51] <SWPadnos> did smoke come out?
[15:58:58] <nullie> nope
[15:59:05] <SWPadnos> then it's probably a fuse :)
[15:59:10] <nullie> it
[15:59:13] <nullie> 's fused?
[15:59:19] <SWPadnos> I think so
[15:59:49] <SWPadnos> it may depend on which revision you have
[16:00:07] <SWPadnos> and it also depends on which I/Os you think are broken
[16:00:29] <nullie> it just doesn't light power led
[16:00:46] <SWPadnos> ok, then it's a fuse or it's dead
[16:05:37] <SWPadnos> it looks like the fuse was added to REV4 boards
[16:05:45] <SWPadnos> the REV3 manual doesn't mention it
[16:07:20] <SWPadnos> hmm, no. my rev1 (or rev0 maybe) has a fuse in it
[16:09:30] <nullie> it's rev5
[16:09:43] <SWPadnos> http://www.geckodrive.com/images/fck_uploads/G540%20REV4%20MANUAL.pdf
[16:09:55] <Jymmm> nullie: did you see what I said?
[16:09:57] <SWPadnos> there are instructions on finding out whether the fuse is blown
[16:10:20] <SWPadnos> Jymmm, his address is in .ru, so sending it back is significantly harder than replacing the fuse (if that's what it is)
[16:10:38] <nullie> yep
[16:10:41] <Jymmm> k
[16:10:51] <SWPadnos> Jymmm, you don't like sushi, right?
[16:11:19] <Jymmm> SWPadnos: It's just bland to me, mostly a waste of money on me eating it.
[16:11:29] <nullie> fuse is dead
[16:11:33] <SWPadnos> ok, I thought I remembered something like that
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[16:11:48] <SWPadnos> nullie, great. now all you have to do is find a replacement.
[16:11:49] <Jymmm> SWPadnos: Though I enjoy ginger and a touch of wasabi =)
[16:11:54] <nullie> heh
[16:12:17] <SWPadnos> but first, you should figure out what you did to blow the fuse. It shouldn't blow in a correctly connected system.
[16:12:21] <SWPadnos> Jymmm, heh
[16:12:46] <SWPadnos> I was thinking of flying in to SFO instead of SJC, and thought about luring you north for a ride^W^Wdinner :)
[16:13:06] <SWPadnos> though HOPR is still quite tasty, IMO
[16:13:18] <Jymmm> brb, coffee
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[17:10:30] <skunkworks> this looks cool
[17:10:31] <skunkworks> http://vimeo.com/18254871
[17:10:51] <skunkworks> http://www.cnczone.com/forums/919375-post107.html
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[17:41:49] <anonimasu> where do i go to get started with hal?
[17:41:54] <anonimasu> wiki?
[17:42:13] <SWPadnos> get started doing what?
[17:42:23] <anonimasu> I have a thc I'd like to get working
[17:42:47] <SWPadnos> ah, in that case I think the wiki might help. I think there are one or two THC articles in there
[17:42:47] <anonimasu> and take the chance to learn more about how to set stuff up
[17:43:08] <anonimasu> is it like the integrators manual that I should read?
[17:43:30] <SWPadnos> well, THC isn't really a manual thing, it's more of an example thing
[17:44:08] <SWPadnos> the manual should cover the mechanics of getting HAL (and EMC in general) to do what you want. you're looking for a sample application
[17:44:21] <anonimasu> in general about hal... I'd like to learn it, since i have my lathe to get working later
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[17:45:34] <SWPadnos> Yep, in that case the integrators manual should have the technical info you need. The sample configs are also good to look through and understand.
[17:45:46] <SWPadnos> and don't forget man
[17:46:00] <SWPadnos> halcmd and most HAL components have man pages
[17:47:40] <anonimasu> thanks
[17:47:40] <anonimasu> :)
[17:47:45] <SWPadnos> sure
[17:50:54] <anonimasu> what is the float switch for plasma?
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[17:52:28] <anonimasu> complex -_-
[17:54:07] <anonimasu> seems like I need one
[17:54:42] <skunkworks> anonimasu: are you going to use the mesa hardware to do it?
[17:54:56] <psha> kb8wmc: do you still need center finding with webcam?
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[17:58:30] <anonimasu> yes
[18:00:29] <skunkworks> have you talked to JT-Shop about how his is setup? I
[18:00:39] <skunkworks> SWPadnos: How is it going?
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[18:39:59] <anonimasu> no, I didnt know he had a plasma
[18:52:38] <skunkworks> iirc he is using a voltage to frequency converter by mesa running into a encoder input for the torch voltage
[18:52:56] <anonimasu> same setup as i will be using
[18:53:22] <skunkworks> iirc he wrote a comp to do it.
[18:55:18] <skunkworks> I don't see it on the wiki
[18:56:00] <micges> skunkworks: thc comp is in 2.5
[18:57:32] <skunkworks> http://www.linuxcnc.org/docview/html//man/man9/thc.9.html
[18:57:34] <skunkworks> heh
[19:07:21] <micges> anonimasu: here on plasma I'm reading voltage, pass it to hal, and my thc is one pid in hal
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[19:43:15] <JT-Shop> me?
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[20:16:14] <tom3p> oword tool change using shuttle. tools hung by pull studs http://imagebin.org/145569
[20:17:22] <tom3p> this kind of ATC has no prep, all action is done on Tn. I use these on sink EDMs and HoPops
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[20:57:58] * JT-Shop can't decide whether to change the chain on the XL200R or work on the shop wiring... its raining if that helpl
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[21:06:02] <newbynobi> mhaberler : Nun weiß ich endlich wie ich Dateien versenden kann. Gruß und Danke für deine Geduld. In den nächsten Tagen mache ich mich ans merge.
[21:06:15] <mhaberler> claro
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[22:17:15] <Valen> http://www.youtube.com/watch?feature=player_embedded&v=X7sbkyWQrnY
[22:17:24] <Valen> oops
[22:24:23] <JT-Shop> http://gnipsel.com/shop/roofing/roofing-19.xhtml
[22:24:43] <Valen> looking good
[22:24:57] <Valen> did you see my glass gears?
[22:25:35] <JT-Shop> no
[22:26:08] <ve7it> Valen, pictures??
[22:26:16] <JT-Shop> oh my fun in a rolling mill
[22:28:18] <Valen> http://www.vapourforge.com/clock/dev/IMAG0893.jpg
[22:28:19] <Valen> http://www.vapourforge.com/clock/dev/IMAG0900.jpg
[22:28:19] <Valen> http://www.vapourforge.com/clock/dev/IMAG0902.jpg
[22:28:27] <Valen> and http://www.youtube.com/watch?v=7ABNOf_fmEQ http://www.youtube.com/watch?v=A5j_Y4CwMLM
[22:28:30] <ve7it> JT-Shop, yes... cleanup on isle 3
[22:29:04] <JT-Shop> I've been in a bunch of steel mills and it is a very scary place to be in
[22:29:10] <Valen> would have to worry about setting stuff on fire or melting wires etc when that happens
[22:29:32] <JT-Shop> everything is hardened
[22:29:48] <JT-Shop> like in rigid conduit etc not in EMT
[22:29:57] <Valen> theres hardened and theres a few hundred kg worth of red hot steel lol
[22:30:24] <Valen> I'm not saying like burn the factory down, but "resetting" could involve a non trivial amount of repairs
[22:34:59] <JT-Shop> do you use the gears for something?
[22:39:46] <andypugh> Just untangling the bar from the machine is going to take a lot of work.
[22:40:42] <JT-Shop> they just whoop out the cutting torches as soon as it cools a bit
[22:41:54] <andypugh> http://www.youtube.com/watch?v=-1Gfc1Iq0GY
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[22:43:12] <Jymmm> I wonder if there's any backlash in that?
[22:43:44] * JT-Shop can't look now :/
[22:43:58] <andypugh> Yes, the gears have about 360 degrees backlash.
[22:44:04] <Jymmm> JT-Shop: toothless gears, kinda cool looking
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[22:44:30] <andypugh> They have teeth, but the middle one only has one (helical) tooth
[22:45:07] <andypugh> The fun part is that they have zero pressure angle, so actually rotate in the same direction.
[22:45:14] <Jymmm> JT-Shop: http://www.jacquesmaurel.com/Html-EN/index.htm
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[22:59:16] <brendanjerwin> Hi all. Is it possible to have an Axis (A in my case) 'auto home' on startup? I've got a extruder (reprap) wired up to it so it really has no home position.
[23:01:21] <andypugh> Just don't define a home position for that axis and it should juat zero.
[23:01:49] <andypugh> (If I recall correctly)
[23:02:04] <JT-Shop> and you do
[23:02:15] <brendanjerwin> :)
[23:02:40] <brendanjerwin> ok, will the wizard be able to deal with that, or do I need to start dealing with the .ini myself?
[23:03:06] <andypugh> I would guess you need to comment out a line in the INI.
[23:03:10] <JT-Shop> I think you might be able to do that in the wiz
[23:03:37] <brendanjerwin> ok, either way, I can give that a try.
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[23:03:38] <andypugh> But try just leaving the home position boxes blank. It's been an age since I touched stepconf.
[23:04:01] <brendanjerwin> another question: is there any way to apply noise reduction/rolling average/etc to the value of a signal?
[23:04:57] <JT-Shop> a float value?
[23:05:01] <brendanjerwin> I'm getting temp for the extruder via an arduino and a python userspace script, but the value is a bit jittery. before I smooth it out in the python script, I thought perhaps the hal had a way to do it
[23:05:05] <brendanjerwin> S32
[23:05:28] <skunkworks> andypugh: got the package! thanks -looks great
[23:06:05] <andypugh> There's a lowpass but I think you might need to convert to float and back
[23:06:37] <brendanjerwin> ok, I can look at that. would that be wired in via the hal config?
[23:06:48] <andypugh> http://www.linuxcnc.org/docview/html/man/man9/lowpass.9.html
[23:06:57] <JT-Shop> brendanjerwin: all the real time components are here http://www.linuxcnc.org/docview/html/
[23:07:02] <andypugh> Yes, that would need to be in your custom HAL.
[23:08:14] <andypugh> skunkworks: I am struggling with one channel which is not behaving like the others. (In a totally baffling way)
[23:08:30] <brendanjerwin> Oh, wow. There is a lot of filter functions there! cool
[23:08:47] <skunkworks> andypugh: do yo think it is programming? or hardware? suppose you don't know ;)
[23:09:16] <andypugh> I don't think it is either. I am coming down to pixies as the only remaining explanation.
[23:09:58] <JT-Shop> static plasma clouds perhaps
[23:10:01] <skunkworks> heh
[23:11:19] <skunkworks> I am still waiting on the brains and I will play with them
[23:14:13] <Jymmm> Mmmmmmmm BRAAAAAAAAAAAAAAAAAAAAAAAAAINZ!
[23:14:34] <JT-Shop> monkey brains yum
[23:14:48] <Jymmm> http://www.youtube.com/watch?v=PMSbdhQM9GU&feature=player_embedded
[23:15:21] <Jymmm> hex hole drilling ^^^^^^^^^^^
[23:15:27] * JT-Shop can't watch
[23:15:43] <Jymmm> square hole drilling http://www.youtube.com/watch?v=9qEhyQfbImY&feature=player_embedded
[23:15:51] <Jymmm> both on lathe
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[23:17:23] <skunkworks> Jymmm: did you see andys? http://www.youtube.com/watch?v=T4q8gCpeY1A
[23:17:36] <Jymmm> square wheeled tricycle http://www.youtube.com/watch?v=LgbWu8zJubo&NR=1&feature=fvwp
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[23:21:06] <andypugh> skunkworks: I was just going to say that EMC2 lets you do hex holes with no special tooling.
[23:21:14] <andypugh> But you beat me to it.
[23:21:35] <Jymmm> andypugh: how clean was it? didnt see and end view
[23:21:37] <JT-Shop> whats the difference between a 60mfd and 60uf run capacitor?
[23:21:50] <Jymmm> milli micro
[23:22:05] <Jymmm> three zeros
[23:22:05] <andypugh> It was potentially very clean, but I didn't set it up quite right.
[23:22:32] <andypugh> No difference. They just don't own a "mu" stamp
[23:22:35] <Jymmm> no wit,
[23:22:43] <JT-Shop> ah ok, thanks Andy
[23:22:46] <Jymmm> JT-Shop: ignre what i said
[23:23:04] <JT-Shop> pl/yjs;pr kurs;
[23:23:21] <Jymmm> JT-Shop: Learn to speak typo
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[23:23:49] <JT-Shop> qweroy qeoruyq[ qledoaa;t atha.0p
[23:24:09] <JT-Shop> dang 2 fat ladies fell on my keyboard
[23:24:22] <JT-Shop> slipped on some bacon fat I suspect
[23:24:27] <bzzzz> are there any linux/oss-friendly fpgas out there? seems everything i've run into (actel, altera, xilinx) deposits a multi-gigabyte windows-only setup onto my hard drive
[23:24:38] <JT-Shop> one was driving a motorcycle with a side car
[23:24:39] <Jymmm> Ok, this is very cool.... http://www.youtube.com/watch?v=0Z8dFlVNrY8&feature=related
[23:24:59] <atom1> i thought xilinx webpack loaded on linux as well
[23:25:02] <atom1> maybe not
[23:26:00] <Jymmm> JT-Shop: you need the "Pit Pass" in that video for sure.
[23:26:07] <bzzzz> atom1: yeah, but being forced to install 3.2 gig of software...i just need to be able to load my netlists onto the damn chip, don't really want those fancy ides and whatnot
[23:26:59] <bzzzz> hm i think i saw something about fpga steppers on the emc wiki
[23:27:14] <bzzzz> step generators*
[23:27:39] <Valen> mesa stuff is all fpga
[23:27:45] * JT-Shop retires to the house to cook sausage surprise yum
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[23:28:29] <Jymmm> The surprise is.... it ain't meat!
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[23:32:42] <bzzzz> they're still xilinx fpgas, so i guess i'd have to use webpack for those
[23:36:04] <Jymmm> Heh, I need a dumb step generator... press a button, it moves 90 degrees
[23:36:53] <Jymmm> wouldn't that be quarter step? eg literally one pulse?
[23:40:13] <Jymmm> wonder if I would need a debounce circuit