#linuxcnc-devel | Logs for 2015-01-28

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[03:41:03] <skunkworks> well that was unexpected..
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[03:54:46] <kwallace1> skunkworks, do you use a rotary axis? I was asked to study the issues with Gremlin's display for a job such as engraving text on a cylinder. I haven't used a A axis so I have no idea what's up. I seem to recall the tool rotates instead of the workpiece.
[03:55:41] <skunkworks> kwallace1: correct.. For some instances it would be nice if the toolpath rotated in the preview instead..
[03:56:02] <skunkworks> (but I don't have a working rotory axis - just a lot of 4+ axis testing)
[03:59:33] <kwallace1> I was told "the paths were a mess". I assume that the text was not legible on the display but cut properly. This may be due to our version of Gremlin. I'm planning on getting a standard LinuxCNC working and play with it in sim but that may take some time.
[04:00:18] <skunkworks> kwallace1: that seems a bit odd.. it would be neat to see examples.
[04:02:48] <kwallace1> I'm just getting started on this, so I need to figure out how to put the g-code together and set up an A axis. I was supposed to have something done by tomorrow morning but I don't think it's going to happen.
[04:03:45] <skunkworks> would kins maybe have to be setup for some geometries for the preview to look correct? (thinking out loud..)
[04:05:44] <kwallace1> I don't know. The part comes out fine so the kins might be okay.
[04:10:47] <skunkworks> kwallace1: if you look at this 5 axis machining video - the preview looks correct in axis for the part it is machining..
[04:10:49] <skunkworks> https://www.youtube.com/watch?v=R1DCXe9t3UE
[04:12:11] <kwallace1> For fun, I put in g0 a 30 and the DRO counted up to 30 but the neither the tool or axes rotated. I suspect the A axis bit in our version of Gremlin is broken, which may be an adequate answer for tomorrow. Thanks for your help.
[04:12:37] <skunkworks> ah
[04:12:39] <skunkworks> ok
[04:15:53] <kwallace1> Hmm, the debug output shows "emcTaskPlanLevel() returned 0
[04:15:53] <kwallace1> Unknown word where unary operation could be
[04:15:53] <kwallace1> Interpreter stack: - int Interp::read_operation_unary(char*, int*, int*) - int Interp::read_unary(char*, int*, double*, double*) - int Interp::read_real_value(char*, int*, double*, double*) - int Interp::read_g(char*, int*, block*, double*) - int Interp::read_one_item(char*, int*, block*, double*)
[04:15:53] <kwallace1> emcTaskPlanExecute(GO A 30) returned 5
[04:15:53] <kwallace1> "
[04:16:51] <kwallace1> It looks like Gremlin and I will have some quality time this week.
[04:18:12] <skunkworks> yeck
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[04:18:56] <kwallace1> Oops wrong again, that error is due to typing in GO (gee oh) instead of G0.
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[15:09:45] <JT-Shop> looks like holecircle.py needs an update
[15:09:52] <JT-Shop> Traceback (most recent call last):
[15:09:52] <JT-Shop> File "/home/john/linuxcnc/nc_files/examples/holecircle.py", line 2, in <module>
[15:09:52] <JT-Shop> BASE = os.environ['EMC2_HOME']
[15:09:52] <JT-Shop> File "/usr/lib/python2.7/UserDict.py", line 23, in __getitem__
[15:09:52] <JT-Shop> raise KeyError(key)
[15:09:52] <JT-Shop> KeyError: 'EMC2_HOME'
[15:10:00] <cradek> arg
[15:11:13] <JT-Shop> I used IN_AXIS = os.environ.has_key("AXIS_PROGRESS_BAR")
[15:11:34] <JT-Shop> brb
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[17:06:43] <seb_kuzminsky> update your wheezy systems, y'all
[17:07:06] <seb_kuzminsky> http://www.openwall.com/lists/oss-security/2015/01/27/9
[17:07:41] <seb_kuzminsky> 2.13-38+deb7u7 from wheezy-security has the fix
[17:09:26] <cradek> or keep your linux systems hidden behind freebsd systems like I do :-/
[17:10:34] <archivist> or keep older stuff up pre that bug
[17:11:13] <cradek> wasn't this one also yearrrrs old?
[17:13:53] <archivist> The first vulnerable version of the GNU C Library is glibc-2.2, released on November 10, 2000
[17:18:31] <cradek> even I don't have systems still running that are older than that
[17:18:43] <cradek> I'd have to plug them in...
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[20:33:09] <CaptHindsight> is Jepler off for the year after all the time he put in the last year or two?
[20:33:29] <cradek> I think he may be in prison temporarily
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[20:34:26] <CaptHindsight> as least he's ok
[20:34:26] <cradek> or maybe on the ISS?
[20:34:31] <cradek> not sure
[20:34:36] <cradek> (yeah he's fine)
[20:35:36] <cradek> and he's not in prison; I just said that for some reason
[20:36:21] <CaptHindsight> it's what I hear often when someones been away for a while
[20:36:28] <CaptHindsight> it's funny
[20:40:12] <seb_kuzminsky> drunk & disorderly conduct, if i had to guess
[20:43:07] <cradek> drag racing in the prius?
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[21:04:27] <skunkworks> prison or iss.. wow - 2 polar opposites..
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[23:36:16] <JT-Shop> lol
[23:42:23] <kwallace1> Hello, does anyone have a link to information on using an A axis. It looks like Gremlin rotates the tool around the tool control point, but if the physical A axis rotates the rotation will center on the A axis center. To get Gremlin to show the A axis move around the axis center, Z and Y axes would need to also move, but that's not good for the part path.
[23:45:52] <andypugh> The first difficulty is deciding what you want to see, then if that is what you ought to see…
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[23:46:46] <andypugh> If Gremin is like the Axis preview (and I think that they are now the same thing?) then it rotates A around the X-axis.
[23:47:00] <andypugh> ie the Y=0 Z = 0 point.
[23:49:24] <kwallace1> I tried it in Axis. I moved to X0 Y0 Z0 then A 45 and the tool rotated with the tip a 0. Then I moved to Z 1 and A 0 and the tool tip rotated at Z 1.
[23:50:12] <andypugh> In _axis_ it depends on the GEOMETRY setting in the INI. If A is first or last in the string.
[23:50:14] <kwallace1> I was sort of expecting to see an arc with 0 as the center.
[23:52:08] <kwallace1> Thank you. I'll look at the docs covering GEOMETRY in the ini.
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[23:58:22] <cradek> also consider that as you change your gcode offsets, you shouldn't expect the center of rotation to move. the center is set up by your homing parameters (which establish the unoffset coordinate system) only