#emc-devel | Logs for 2011-08-23

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[05:04:10] <psha> 2mah: added gaxis.ini and rebased on top of v2.5
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[07:41:59] <mhaberler> hi psha! you make my day, at last I may continue on documentation ;-)
[07:42:02] <mhaberler> thanks!
[07:46:47] <CIA-11> EMC: 03cmorley 07v2.5_branch * re3538c8dcaff 10/docs/src/config/pncconf.txt: docs - add write-up for PNCconf
[07:46:48] <CIA-11> EMC: 03cmorley 07v2.5_branch * r9d6a67264d1e 10/src/emc/usr_intf/pncconf/pncconf.py: pncconf -change PID to load with names= instead of using alias
[07:47:32] <psha[work]> mhaberler: i've tested it a bit and it's loading files fine for me
[07:47:59] <mhaberler> hm,hm, loading works
[07:48:11] <mhaberler> that raises the bar ;-)
[07:48:36] <psha[work]> :)
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[09:10:48] <mhaberler> psha: gaxis.hal is missing
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[10:01:14] <psha[work]> mhaberler: oops, sorry
[10:01:22] <psha[work]> i'll add it in the evening
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[10:22:51] <mhaberler> I didnt believe the 'loading' thing in the first place ;-)
[10:36:50] <psha[work]> :)
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[13:22:18] <JT-Shop> does the G81 R position come from the last Z feed move or rapid move before the G81? http://www.linuxcnc.org/images/fbfiles/files/SIDDS_C_drT_.ngc
[13:22:52] <JT-Shop> I don't think I asked the correct question
[13:22:54] <JT-Shop> hmmm
[13:34:55] <JT-Shop> nevermind he is more confused than I am
[13:49:55] <CIA-11> EMC: 03jepler 07v2.5_branch * r7d744ce68b80 10/ (5 files in 4 dirs): Remove dubious execute bits
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[14:05:56] * JT-Shop smacks forehead on desk a few times
[14:06:33] <JT-Shop> I'm betting he was viewing machine position not relative position...
[14:11:44] <CIA-11> EMC: 03jepler 07master * re3538c8dcaff 10/docs/src/config/pncconf.txt: docs - add write-up for PNCconf
[14:11:45] <CIA-11> EMC: 03jepler 07master * r9d6a67264d1e 10/src/emc/usr_intf/pncconf/pncconf.py: pncconf -change PID to load with names= instead of using alias
[14:11:46] <CIA-11> EMC: 03jepler 07master * r7d744ce68b80 10/ (5 files in 4 dirs): Remove dubious execute bits
[14:11:48] <CIA-11> EMC: 03jepler 07master * rb81c4762a46d 10/ (7 files in 6 dirs): Merge remote branch 'origin/v2.5_branch'
[14:11:48] <CIA-11> EMC: 03jepler 07master * re6b75a805661 10/src/Makefile: Remove dubious execute bit
[14:13:47] <cradek> JT-Shop: do you think there's a problem with cycles?
[14:25:22] <jepler> ^^ hopefully I've killed the last of the files with bogus +x bits in git
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[14:34:22] <cradek> yay
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[18:07:14] <JT-Shop> cradek: no, I'm an idiot that is all
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[19:46:13] <cradek> and andypugh comes through with a concise bug report
[19:47:39] <andypugh> It probably only really affects wierdos who use G98 G81 in MDI with a manual boring head.
[19:50:44] <cradek> andypugh: have you tried changing your parallel port mode to fix it?
[19:51:30] <andypugh> Doh! It's so obvious!
[19:52:29] <andypugh> Been following the forum then?
[19:52:39] <cradek> only glances
[19:52:58] <cradek> I was waiting for you to sort through all of it and see whether something was actually wrong
[19:54:19] <cradek> actually I can't reproduce it
[19:54:27] <andypugh> Well, I actually noticed it on my own machine first.
[19:54:49] <andypugh> Are you in MDI?
[19:55:06] <cradek> home, f5, g0z0, f3, jog up to .1173, f5, g98 g81 r.05 z-1 f99, it drills and goes back to .1173
[19:55:31] <cradek> I think that's the correct behavior
[19:55:32] <andypugh> Now jog to some other value and retry?
[19:55:37] <cradek> I did it 3 times
[19:55:47] <andypugh> Very idd
[19:55:51] <andypugh> odd, even.
[19:55:54] <cradek> G98 = Retract to the position that axis was in just before this series of one or more contiguous canned cycles was started.
[19:56:08] <cradek> if you can reproduce, give me an exact step by step
[19:56:42] <andypugh> Try it in sim/axis_mm
[19:56:58] <cradek> oh I see what you're seeing
[19:57:12] <cradek> here is what you're doing:
[19:57:39] <andypugh> Maybe there needs to be a G80 to reset?
[19:58:00] <cradek> home, f5, g0z0, f3, jog up to .1173, f5, g98 g81 r.05 z-1 f99, it drills and goes back to .1173, f3, jog up to .2222, f5, g98 g81 r.05 z-1 f99 again, and now it goes back to .1173 again instead of the .2222 you expected
[19:58:21] <andypugh> Indeed.
[19:58:43] <cradek> notice the docs I pasted
[19:58:43] <andypugh> Now, my expectation might be wrong, thinking about it, as we are still inside a sequence of canned cycles..
[19:58:51] <cradek> "just before this " ... yeah exactly
[19:59:03] <cradek> you made me not have to type it out
[19:59:39] <cradek> do you think this is what the guy on the forum is confused by? I admit I didn't read all the thread.
[19:59:40] <andypugh> So, not a bug, but a feature then.
[19:59:48] <andypugh> It might well be,
[20:00:04] <andypugh> (A feature is a bug with documentation :-)
[20:00:08] <cradek> The "initial" (G98) plane is reset any time cycle motion mode is abandoned, whether explicitly (G80) or implicitly (any motion code that is not a cycle).
[20:00:21] <cradek> wow, these docs kick ass
[20:01:16] <andypugh> I would contend that jogging probably ought to count as a non-cycle move
[20:01:17] <cradek> I'm fairly sure it's doing what the docs say but jogging inside the series of contiguous canned cycles is a very weird case
[20:01:59] <andypugh> Yes, only really used by lazy folk with boring heads.
[20:02:03] <cradek> I'm not sure what all f3-jog-f5 should reset inside the interpreter.
[20:02:14] <cradek> for instance it sure doesn't reset g90/g91 and you wouldn't want it to
[20:02:23] <cradek> also g20/g21
[20:02:52] <andypugh> The persistence if G81 et.al. is a bit strange in itself.
[20:03:13] <cradek> if you want it to cause behavior like G80, you would lose stuff like R plane too
[20:04:00] <cradek> yes I agree it sure feels a little weird
[20:04:18] <cradek> there is a lot of persistence, over and above the usual persistance of words
[20:04:27] <andypugh> Hmm, and that makes little sense. Though it would be a brave user who jogged then re-issued G81 without an explicit R-word.
[20:05:08] <cradek> especially the G98 retract position persistence, which survives switches among G98/G99/G81/G83/G85 as long as it's all contiguous
[20:05:29] <andypugh> Does it persist through % and M2?
[20:05:55] <cradek> M2 surely not, % *maybe*
[20:06:08] <cradek> % explicitly does nothing except stop execution
[20:06:12] <andypugh> Because the forum dude was confused that it appeared that adding % at the beginning and end changed behviour
[20:06:40] <andypugh> But then perhaps reloading the file does it?
[20:06:55] <cradek> got me
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[20:07:54] <andypugh> I will just go back to the forum and explain, and delete my bug report.
[20:08:19] <cradek> but was he talking about mdi at all?
[20:08:26] <andypugh> Oh, hai JT. Just decided it's a feature, not a bug.
[20:08:50] <andypugh> No, he was using a G code routine that begins with a G81, with no prior move
[20:09:02] <cradek> I'm not convinced there's no bug at all, but I think I'm convinced your case is not one
[20:09:25] <andypugh> So am I, it is an unanticipated feature.
[20:09:52] <JT-Shop_> Hi Andy
[20:09:52] <JT-Shop_> undocumented feature
[20:09:53] <cradek> he may have arranged to have more "contiguous" cycle moves than he intended
[20:10:00] <cradek> JT-Shop: but it's documented :-)
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[20:10:38] <cradek> maybe he can remove all surprises by ending his programs with M2 and starting with init codes?
[20:11:19] <cradek> "Remember that the R word has different meanings mode absolute displacement and incremental mode of travel."
[20:11:32] <cradek> ?REDO FROM START
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[20:12:05] <JT-Shop> heh
[20:12:26] <cradek> brb
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