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[01:31:33] <jepler> memleak: yes, differences are given in the gcc info manual under "c extensions". asm and attribute are two examples used in linuxcnc.
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[03:38:26] <Roguish> hey all. I'm trying to get gmoccapy to run and get the following error. any clues would be helpful, i'm at a loss..
[03:38:38] <Roguish> emc/task/emctask.cc 389: interp_error: Cannot restore context from invalid stack frame - missing M70/M73?
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[04:53:13] <seb_kuzm1nsky> the interp list that was appended to is not interp_list, it's mdi_execute_list
[04:54:18] <seb_kuzm1nsky> because of a bug confusing the four(!) ways commands are queued between the UI and Motion (NML Command channel between UI & Task, interp_list, mdi_execute_list, and emcTaskCommand)
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[04:59:16] <seb_kuzm1nsky> TIL the Task mdi queueing code uses recursion
[05:01:11] <seb_kuzm1nsky> http://i.imgur.com/3AmMRPk.jpg
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[06:36:39] <zeeshan-MILL> hm
[06:36:47] <zeeshan-MILL> im geting about 18000 ns
[06:37:00] <zeeshan-MILL> after couple hours of running this thing
[06:37:10] <zeeshan-MILL> whoops
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[15:29:19] <jepler> so what do we do about the guy who wants to improve sampler, but says he can't generate a patch, so he can't give a signed-off-by to his changes?
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[15:51:32] <cradek> you can SOB the changes if you feel it's appropriate
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[15:59:10] <jepler> this rebase of liblinuxcnc-ui onto master is harder going than I expected
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[16:05:48] <jepler> huh and my gitk's broken (shows terminal escape codes in the diff window)
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[16:36:15] <seb_kuzm1nsky> the bug is in the if statement on line 3436 of task's main
[16:36:19] <seb_kuzm1nsky> http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=blob;f=src/emc/task/emctaskmain.cc;h=6c1175e472f506d2fdefd876337a19d16b1d6ce7;hb=refs/heads/2.6#l3436
[16:36:33] <seb_kuzm1nsky> it's forgetting to check mdi_execute_queue.len()
[16:37:02] <seb_kuzm1nsky> task can get itself into a situation where there's nothing on the interp_list, nothing in emcTaskCommand, but queued mdi commands in mdi_execute_queue
[16:37:28] <seb_kuzm1nsky> and in that situation, status->status blinks Done for one task-cycle
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[16:53:19] <jepler> that sure could be it
[16:53:22] <jepler> seb_kuzm1nsky: good sleuthing
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[16:53:49] <jepler> (are status and task.status ever set to different values?)
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[17:45:24] <seb_kuzm1nsky> i dont think so
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[18:52:35] <cradek> what are the chances of getting the 5i25 to run my C axis when I don't actually know what pins it's wired to?
[18:57:05] <Tom_itx> good
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[19:43:20] <cradek> hm, I think it's hooked to pins 16 and 17
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[19:45:12] <cradek> linksp Cstep => parport.0.pin-17-out
[19:45:12] <cradek> linksp Cdir => parport.0.pin-16-out
[19:45:13] <cradek> yep
[19:45:18] <cradek> (hey why not look at the old config)
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[19:55:11] <cradek> well that bites
[20:04:17] <kwallace> I'm using feed rate compensation on arcs in my milling g-code generators. I calculate an adjusted feed from the ratio between the tool control point radius and the arc surface radius. This gives me the same rate on the arc surface as called out for a straight cut. In giving it more thought, the tool is usually cutting most of the tool diameter width, so with wide tools on small radii, the feed rate can be very different across the tool width.
[20:06:12] <cradek> yeah it's really not clear what's best to do
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[20:13:11] <kwallace> I guess I need to look at each set of values for tool and path, then change the calculation to fit if needed. I kind of wish I had thought of this earlier.
[20:13:49] <cradek> "just don't do that" might be a decent solution
[20:14:18] <cradek> or only slow down if your part is on the long side, don't speed up if it's on the short
[20:14:41] <cradek> I have never compensated arc feeds in that way and it hasn't bitten me yet
[20:15:54] <kwallace> Indeed. I wonder what G41/42 does.
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[20:16:06] <Tom_itx> i can say it's not something production shops worry with
[20:16:33] <cradek> g41/g42 mode theoretically has enough knowledge to do this, but it doesn't do it
[20:17:00] <cradek> I bet it causes more problems than it solves, unless the tools are very big
[20:18:04] <Tom_itx> generally speaking larger tools are used for roughing passes where it matters little
[20:18:13] <Tom_itx> it's the finish pass that pays the money
[20:18:25] <cradek> did you go down this path for practical reasons - to solve a problem, or just because it seemed right to do?
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[20:19:41] <Tom_itx> climb vs conventional will cause you just as much grief
[20:19:51] <kwallace> It seemed right, plus some of my cuts sounded better, but it may not apply everywhere.
[20:22:28] <kwallace> I seem to recall being influenced by this:
http://www.sandvik.coromant.com/en-gb/knowledge/milling/application_overview/holes_and_cavities/circular_external_milling_ramping/Pages/default.aspx
[20:22:43] <Tom_itx> i think my cam has a setting for arcs but i'm not sure i use it
[20:23:44] <kwallace> Fortunately, my CNC machines are pretty tight so I always climb.
[20:23:53] <Tom_itx> yeah
[20:23:59] <Tom_itx> you're better off if you can
[20:27:05] <kwallace> I think I'll look at calculating the max and min effective feed rate, then apply compensation if it seems reasonable, but otherwise turn it off.
[20:29:36] <cradek> I'd think the only-slow-down algorithm might be the "reasonable" test
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[20:34:19] <jepler> > Subject: [UNNECESSARY PATCH 00/16] signal: coding style wankery...
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[20:35:36] <kwallace> I think stainless, titanium or inconel might have a problem with a slow down. :)
[20:38:34] <cradek> grr, if the motor on C was the same, I could just use Y's amp
[20:41:30] <Tom_itx> kwallace is it that noticeable a change?
[20:41:58] <Tom_itx> true they'll work harden but constant feed is what you're after there
[20:44:02] <kwallace> http://www.cnczone.com/forums/tormach-personal-cnc-mill/206418-machining-304-ss-first-time-tormach-steel.html
[20:46:02] <Tom_itx> FSWizzard is a good tool to follow
[20:46:09] <cradek> so, looks like custom 5i25 firmware, or go back to a plain parallel port
[20:46:13] <cradek> I don't like either option
[20:46:33] <Tom_itx> why not?
[20:46:42] <Tom_itx> it's not that difficult to mod a bit file
[20:47:01] <cradek> if I have one that nobody else is using, it won't get bugfixes
[20:47:21] <Tom_itx> oh
[20:47:27] <Tom_itx> early test model?
[20:47:53] <cradek> all software is an early test model :-)
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[20:56:41] <kwallace> Recently, I wanted to play with a FET bridge using a 20kHz PWM with decent resolution. I was surprised to find my Arduino could do it at 20kHz and 10 bit resolution with a few lines of code. I didn't need to resort to an FPGA.
[20:58:22] <Tom_itx> yep
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[21:01:27] <cradek> pcw_home: would you build me a custom 5i25 firmware please?
[21:03:49] <cradek> I think I am currently using 5i25_dmmbob1x2.pin but I need an additional stepgen on the external connector, dir=16 step=17
[21:04:12] <cradek> I don't use the PWMs
[21:04:22] <Tom_itx> is your current bit file custom?
[21:04:51] <cradek> no
[21:05:41] <Tom_itx> just one extra stepgen on pin 16 17?
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[21:07:22] <Tom_itx> i don't see the file in the zip
[21:09:43] <cradek> that's in my 5i25.zip
[21:10:02] <cradek> I think it's the one that matches what I'm getting from mesaflash --readhmid
[21:10:57] <Tom_itx> i just grabbed a fresh one...
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[21:15:39] <Tom_itx> there it is
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[21:36:16] <Tom_itx> not finding a .vhd file for it
[21:37:08] <Tom_itx> maybe the 5i25 is configured differently..
[21:37:14] <Tom_itx> i'm not sure since i don't have one
[21:50:51] <Tom_itx> cradek if i could find it i'd look at it...
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[21:55:21] <cradek> Tom_itx: thanks, I can wait for pcw to help me tomorrow
[21:55:34] <cradek> I'm so far down the rabbit hole I bet I wouldn't get anything cut today anyhow
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[21:55:51] <Tom_itx> i see the xml and pin but no vhd
[21:56:06] <Tom_itx> not in the source dir
[21:57:00] <cradek> chris@emc:~/Downloads/5i25/configs/hostmot2/source$ unzip -v hostmot2.zip |grep BOB
[21:57:04] <cradek> 10015 Defl:N 2329 77% 2014-01-14 16:19 10ce2727 PIN_DMMBOB1x2_34.vhd
[21:57:13] <cradek> that's surely it
[21:57:17] <skunkworks_> cradek: whatcha makin?
[21:57:35] <Tom_itx> lemme look again
[21:57:39] <cradek> skunkworks_: max needs to be 5 axis again, for cutting some lenses
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[21:57:54] <skunkworks_> neat@
[21:58:55] <Tom_itx> ok i see that
[22:02:15] <Tom_itx> what IO are they?
[22:02:22] <Tom_itx> 5 & 7?
[22:02:43] <Tom_itx> those are pin 16 & 17 but not sure which connector
[22:03:05] <cradek> pretty sure 5/7 is right
[22:03:21] <cradek> you could add a stepgen to both connectors
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[22:11:26] <Tom_itx> heh. i forgot i swapped hdd. installinx webpack...
[22:12:04] <cradek> you're brave, thanks for doing it
[22:12:19] <Tom_itx> i did a custom one for mine
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[22:12:31] <Tom_itx> i just haven't done a 5i25
[22:12:36] <Tom_itx> looks quite similar
[22:12:57] <Tom_itx> i needed to get this set up again anyway
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[22:51:32] <Tom_itx> cradek are you using all 8 stepgens now?
[22:52:11] <cradek> no, I only need the 5 of them on the external connector
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[22:56:57] <Tom_itx> are you using the internal connector?
[22:58:09] <Tom_itx> i have 5 on the external one now
[22:58:25] <cradek> no, I don't care about the internal connector
[22:58:43] <Tom_itx> dir pin 16 step pin 17
[22:59:21] <cradek> yay, that's right
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[23:03:44] <Tom_itx> ok we'll see what happens
[23:10:01] <seb_kuzminsky> i've got a test here, written in C using lui, that triggers the dropped-mdi bug within about an hour of repeated running
[23:10:30] <seb_kuzminsky> i'm confident the bug is present in task in 2.6
[23:10:48] <seb_kuzminsky> i tried to write a test using the "linuxcnc" python module in 2.6 to trigger the bug, but it won't bite
[23:10:53] <cradek> ugh, an hour
[23:11:05] <Tom_itx> generating bit file
[23:11:06] <seb_kuzminsky> the bug is highly sensitive to timing, and i'm guessing that python's too slow to trigger it
[23:11:33] <seb_kuzminsky> i think i'm going to make sure it's fixed in my lui branch, then cherry-pick the task fix back to 2.6 and merge it up
[23:11:49] <seb_kuzminsky> because i'm so sick of this thing that i dont want to write a non-lui C program to test for the bug
[23:12:06] <cradek> yeah just fix it and move on, jeez
[23:12:14] <seb_kuzminsky> cradek: i really want to see a video of max grinding lenses
[23:12:15] <seb_kuzminsky> :-)
[23:12:30] <cradek> a test that triggers a bug once an hour isn't something we want the buildbot to run anyway
[23:12:43] <seb_kuzminsky> heh yeah
[23:13:08] <seb_kuzminsky> it's blind luck that the little lui test happened to trigger the bug randomly one time
[23:13:12] <seb_kuzminsky> for some definition of luck
[23:13:51] <seb_kuzminsky> <+cradek> yeah just fix it and move on, jeez
[23:13:58] <seb_kuzminsky> i get that a lot from my $DAYJOB boss too...
[23:14:04] <cradek> heh
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[23:21:32] <Tom_itx> cradek, see what this does:
http://tom-itx.ddns01.com:81/~webpage/cnc/C-Radek/
[23:21:50] <Tom_itx> added the c suffix
[23:22:00] <cradek> Tom_itx: could you also put the vhd and pin there?
[23:22:08] <Tom_itx> vhd yes
[23:22:11] <Tom_itx> pin maybe
[23:22:13] <cradek> heh
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[23:24:18] <Tom_itx> i don't think it generates a pin file
[23:24:21] <Tom_itx> i've never used one
[23:25:43] <Tom_itx> you can edit your other one to reflect pin 16 17 stepgen
[23:27:51] <Tom_itx> i should clean up the vhd file
[23:28:00] <Tom_itx> i left the original lines commented out...
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[23:35:54] <Tom_itx> that give you 9 stepgens
[23:35:59] <Tom_itx> instead of 8
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[23:43:08] <cradek> Tom_itx: thanks, I will try it after dinner
[23:43:40] <Tom_itx> if for some reason that's too many stepgens i can get rid of one off the other connector
[23:43:59] <Tom_itx> i ran into one once where i had too many functions defined
[23:44:04] <Tom_itx> but this is just instances
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[23:55:07] <Tom_itx> i noticed i mislabelled them A step dir... there's already a set for A.. no biggie
[23:55:50] <Tom_itx> maybe B Step B dir would be better
[23:56:59] <Tom_itx> fixed..
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