Mill jumping but LinuxCNC shows correct path

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09 Jan 2013 17:47 #28513 by Rick G
O.K. as John said it sounds like missing steps.

I would first try running the program as an "air cut" above the work to see if the problem still occurs. This should help determine if there is too much load during the cut.
Also try running at a slower speed.
Take a look at adjusting your acceleration rates.

You might want to read this...
www.linuxcnc.org/index.php/english/forum...ft-help?limitstart=0

Rick G

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09 Jan 2013 21:27 #28517 by andypugh

Gcode attached. (Not letting me attach the file)

The issue starts somewhere around here:

X5.5121 Y2.8685 Z-0.0277
G00 Z0.1987
X0 Y0
Z0.0509
G01 Z-0.0376 F3.93!!


My suspicion would be that your rapid rate is too high and the steppers are stalling for a moment.
You won't see this during manual jogs if the jog speed is less than the maximum axis speeds (set in the [AXIS] or [TRAJ] sections of the INI.

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10 Jan 2013 07:16 #28529 by thegrandwazoo
Thanks I will test this asap and let you all know the outcome.

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12 Jan 2013 00:18 #28596 by thegrandwazoo
Thank you very much gentlemen! You lead this NooB down the path of success! It was indeed the speed. I slowed it down and it is no linger losing steps.

Thanks again!!!!

-Erick

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12 Jan 2013 16:51 #28620 by Rick G
Glad you got it sorted out!

Rick G

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