G64 Path Blending Not Working As Expected

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27 May 2013 00:40 - 27 May 2013 00:41 #34728 by evokanevo
I run the following gcode and get this path. What surprises me is that the leadin (left side) deviation from the path is greater than the leadout (right side). I would expect it to be symmetrical.
G64 P5.0 Q1.0
G0 x[0.000000] y[60.000000] z[30.000000] a[0.000000]
G1 x[0.000000] y[60.000000] z[0.000000] a[0.000000] F20000
G1 x[90.000000] y[60.000000] z[0.000000] a[0.000000] F20000
G1 x[90.000000] y[60.000000] z[30.000000] a[0.000000] F20000

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Last edit: 27 May 2013 00:41 by evokanevo. Reason: weird spacing

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27 May 2013 00:57 #34729 by skunkworks
Your gcode in your screen shot doesn't match what you posted :)

Could you post the whole gcode program?

sam

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27 May 2013 01:35 - 27 May 2013 01:45 #34731 by evokanevo
It does match. The o-code (line N20) gets translated into exactly the gcode posted. Look at the move XYZA coordinates and the end position shown in the window.

Also, I verified by creating a separate file with just the gcode I posted and ran that alone - identical results.
Last edit: 27 May 2013 01:45 by evokanevo. Reason: further information

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27 May 2013 05:08 #34737 by evokanevo
This behavior is due to the Z-acceleration being lower than the XY-acceleration.

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