#emc | Logs for 2009-03-07

[00:02:58] <JymmmEMC> archivist: you biotch! lol
[00:35:54] <toastydeath> toastydeath is now known as purpleshelf
[02:21:40] <maddash> my emc2.2-2 is broken
[02:21:56] <maddash> 2-2.2
[02:26:36] <Patrice> Does anyone have a copy of Ray Henry's note from last Fest? It taught EMC2 and HAL using a PMDX-122.
[03:18:24] <purpleshelf> purpleshelf is now known as toastydeatrh
[03:18:26] <toastydeatrh> toastydeatrh is now known as toastydeath
[04:32:40] <|dareposte|> cradek: I ran halscope and the real scope, and didn't see any missing pulses on the threading cycle
[04:32:57] <|dareposte|> i made a video of the behavior, it might finish uploading some day
[04:33:03] <|dareposte|> stumped now
[04:33:43] <|dareposte|> my spindle speed varies less than 1% according to the index pulse, so it shouldn't be jumping around like this
[04:44:11] <|dareposte|> anybody used the interpolated encoder function?
[04:53:48] <|dareposte|> here's the video of the problem: http://www.youtube.com/watch?v=vOPqd4JzxA4 :( :( (
[04:56:55] <|dareposte|> those are three identical threading cycles, g33 k1.0
[05:00:14] <|dareposte|> clearly a bit of a problem
[05:32:16] <|dareposte|> aha
[05:32:53] <|dareposte|> put halscope up to the highest setting, and found a spike of noise on the line
[05:33:36] <|dareposte|> probably noise from the vfd i guess, spiking the line occasionally and causing an extra spindle pulse
[05:34:18] <toastydeath> or it could be ALIENS
[05:34:26] <toastydeath> no, i kid
[05:51:28] <|dareposte|> might be
[05:51:33] <|dareposte|> i wrapped my head in tinfoil just to be safe
[05:51:38] <|dareposte|> and the vfd to motor cable
[05:51:40] <|dareposte|> but it got worse
[05:51:46] <|dareposte|> so much for that theory
[05:52:13] <|dareposte|> how i long for double shielded twisted pair differential signalling lines like i have at work
[05:52:55] <|dareposte|> i never appreciated them so much before
[05:54:32] <|dareposte|> maybe it would help if i grounded the tinfoil
[05:54:38] <|dareposte|> with an alligator clip
[07:08:36] <|dareposte|> woo hoo
[07:09:20] <|dareposte|> the grounded alligator clip, combined with a pull down resistor and shielded encoder cable seems to have corrected the problem
[07:09:33] <|dareposte|> just ran 25 parts and all had perfect npt pipe threads when they came out
[07:26:55] <|dareposte|> Here's the proof: http://www.youtube.com/watch?v=xWtyjMShFns
[07:53:30] <tim__> Hara :-)
[14:51:47] <F1514> hi
[15:00:32] <dareposte> hi
[15:07:25] <F1514> :)
[15:58:28] <alex_joni> that's 1ppr threading
[15:59:45] <DanielFalck> ok, so similar to how mach does it
[16:01:31] <DanielFalck> a guy that I know locally (Patrice Saad) just finished setting up emc2 for probing and routing eyeglass lenses at his workplace. If he shows up here, ask him about it.
[16:01:52] <DanielFalck> he sent me some pics and videos and it is pretty interesting
[16:03:31] <alex_joni> DanielFalck: it's nice to see people successfully using emc2
[16:03:49] <alex_joni> it's even better to see them telling others about it via wiki.linuxcnc.org
[16:04:13] <DanielFalck> hopefully he can show the videos in public sometime- I'm not sure if he can
[16:07:17] <DanielFalck> alex_joni: check this out:http://code.google.com/p/heekscnc/wiki/CaseStudies
[16:07:50] <DanielFalck> http://code.google.com/p/heekscnc/wiki/SliptonicCar
[16:08:31] <alex_joni> looks like a hammer to me, not a car :D
[16:09:02] <alex_joni> I love how his keyboard looks
[16:09:32] <DanielFalck> go to the project home page http://code.google.com/p/heekscnc/
[16:09:43] <DanielFalck> to see what we're up to now
[16:09:55] <alex_joni> I saw some of heekscad and heekscnc
[16:10:13] <alex_joni> I must say I really like that there is progress in those fields
[16:10:31] <DanielFalck> it's moving along
[16:11:25] <alex_joni> that's great
[16:11:37] <alex_joni> one day we should talk about including it in the LiveCD
[16:11:59] <DanielFalck> that would be good
[16:11:59] <alex_joni> do you build linux versions yet? I saw only some .exe files in the download area
[16:12:15] <DanielFalck> it's working for me in Ubuntu8.04
[16:12:26] <DanielFalck> archivist helped him get that going a while ago
[16:12:41] <DanielFalck> you have to get it from svn
[16:12:52] <DanielFalck> and Opencascade is required
[16:13:52] <archivist> I need to get his make files better one day
[16:14:09] <DanielFalck> it requires the HeeksCAD first, then build HeeksCNC , then build the pocketing and adaptive roughing libs
[16:14:58] <DanielFalck> I'm pretty sure crochet is working on a makefile now too
[16:15:37] <DanielFalck> fyi we're still hanging out in #cam
[16:16:03] <DanielFalck> you're there :)
[16:16:08] <alex_joni> I am now :P
[16:26:48] <SWPadnos__> SWPadnos__ is now known as SWPadnos
[16:58:12] <jst_home_> jst_home_ is now known as jst_home
[17:20:05] <fenn> i need to learn how to track down segfaults and fix them
[17:20:22] <fenn> heekscad is unusable because of them
[17:21:22] <fenn> oops wrong chan
[18:13:25] <dgarr> anyone ever used these capacitive encoders? http://www.amtencoder.com/
[18:28:01] <LawrenceG> dgarr, yes... a friend bought a couple for his cnc project. they seemed to work OK, they come with a nice selection of shaft collars for a whole range of shaft sizes http://media.digikey.com/photos/CUI Photos/AMT102-V.jpg
[18:28:38] <LawrenceG> dgarr, http://media.digikey.com/photos/CUI Photos/AMT102-V.jpg
[18:28:58] <LawrenceG> dgarr, "http://media.digikey.com/photos/CUI Photos/AMT102-V.jpg"
[18:29:06] <LawrenceG> crap
[18:29:23] <LawrenceG> <http://media.digikey.com/photos/CUI Photos/AMT102-V.jpg>
[18:29:32] <LawrenceG> I hate spaces
[18:31:17] <dgarr> i like the multiple configurations and it seems like they would be good in a dusty environment compared to optical encoders + the price seems reasonable
[18:32:12] <LawrenceG> yes
[23:27:41] <Wanderer> Anyone able to help with a clarion snapshot question? When I do a "powrmnt display dev=all" one of my snapshots doesn't display a logical device name, but has a logical device ID
[23:27:53] <Wanderer> Trying to script some things and one of 6 devices is missing the device name
[23:29:20] <Wanderer> hmm, seems to be a different EMC than the one I'm looking for
[23:30:41] <JymmmEMC> Wanderer: EMC == http://linuxcnc.org
[23:46:29] <Optic> hey!
[23:46:42] <Optic> we've got an old laser engraver that we're trying to run with EMC
[23:47:30] <Optic> is there a "normal" way in the CNC world to control the laser on/off? Would it be called the z axis?
[23:48:58] <Wanderer> JymmmEMC: yeah, saw the topic after I asked the questin
[23:49:03] <Wanderer> ok, good luck
[23:57:27] <toastyde1th> optic:
[23:57:39] <toastyde1th> m3/m4/m5 are the spindle rotation commands in gcode
[23:57:45] <Optic> ok
[23:57:55] <toastyde1th> m3/m4 are "on", and m5 is off.
[23:58:17] <Optic> in the case of engraving, laser on means active cutting
[23:58:59] <toastyde1th> in your case it's probably "better" to just have the laser on anytime the machine is in g1, and off in g0
[23:59:07] <toastyde1th> but i'm not sure how that would work, if it's even possible
[23:59:50] <Optic> that's why i was thinking of using z