Machine only moves 1/12 the distance in G1 code line

Les91
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9 years 10 months ago #83750 by Les91

Machine only moves 1/12 the distance in G1 code line was created by Les91

When runnig the cnc config wizard, I checked each axis and they moved the specified amount. When I run the attached G code file, the machine moves only 0.39 inches for the 2 - 5 inch moves. Do I have to config the G code interpreter? Can you help.
Thanks

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Todd Zuercher
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9 years 10 months ago #83752 by Todd Zuercher

Replied by Todd Zuercher on topic Machine only moves 1/12 the distance in G1 code line

That is easy, your first line of your G-code file has G21 (mm-mode) in it. Change it to G20 (inch mode).

Code:

(Test Link CNC)
G21 G90 G61 G40 F3 (change the G21 to G20 here!)
G0 X5 Y5
G91
G1 X5 F10
G1 Y5 F3
G1 X-5
G1 Y-5
G90
G0 X0 Y0
M2

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andypugh
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9 years 10 months ago #83758 by andypugh

Replied by andypugh on topic Machine only moves 1/12 the distance in G1 code line

There might well still be a factor of 2 error. If there is then it is likely to be due to the driver microstep setting not matching what LinuxCNC was told.
You can fix it in Stepconf, edit the INI file or alter the settings on the drive, as you feel fit.
But only one of those, not all three :-)

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Todd Zuercher
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9 years 10 months ago #83767 by Todd Zuercher

Replied by Todd Zuercher on topic Machine only moves 1/12 the distance in G1 code line

Good catch Andy. Lazy me, I didn't bother to do the math.

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