Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: dwilliams56 on November 05, 2011, 12:28:45 AM
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I fire up my router and do a ref all everything appears normal.
I jog an axis one inch and the spindle moves one inch.
BUT, if I load a file then all three DROs move to a seemingly random location. If I then move the spindle 1 or 2 inches the DRO only moves by some small amount, say .06 or something.
So if I try to move the Z axis 4 or 5 inches the Z hits the stop long before the Z axis DRO gets to 0.75in.
Anyone have any clues??
Thanks,
Don
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Have you checked your native units are set to inches (assuming you are working in inches) ??
Is the GCode file you are loading using inch units ??
Tweakie.
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Yes. That is one of the first things I thought of too. But, the movement of the DRO has no relation to the movement of an axis.
Inches or MM makes no difference
Thanks for looking,
Don
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BUT, if I load a file then all three DROs move to a seemingly random location. If I then move the spindle 1 or 2 inches the DRO only moves by some small amount, say .06 or something.
Don,
What file are you loading ??
Does this happen with any file ??
Tweakie.
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This sounds like your native units are mm and your loading a file with G20 in it.
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Units don't matter. The movement of the DRO doesn't relate to the movement of the spindle. Large movement of the spindle small change in DRO.
I tried a couple different files with same result.
Don
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Does your g-code have a G21 in it? I'm pretty sure it's a units issue. Probably opposite what I said before. Machine set up in inches, and running a file in mm's.
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Gerry I have G20 in my Mach init string.
How do I check my native units? This is a new machine (K2CNC). The only software I received was the Mach profile.
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>>How do I check my native units
Never mind I found it in motor tuning.
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Does your g-code have a G21 in it? I'm pretty sure it's a units issue. Probably opposite what I said before. Machine set up in inches, and running a file in mm's.
Gerry you and Tweakie are right!
My machine was motor tune in MM... If I put a G21 in my code I can run my files:)
What do I need to be aware of to change the motor tuning to inches??
Thanks for your quick help!
Don
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Don,
If your motor tuning is in mm (and it is correct) then just convert the metric entries to inch units (eg. 320 steps / 25.4 = 12.5984 steps) and so on for Vel. and Acc. - remember to save each axis settings before proceeding to next axis. Also make sure Config. / Select Native Units is set to inches. Then test it thoroughly and if necessary make any small adjustments to Vel. and Acc. to obtain the best, 100% reliable, performance.
Tweakie.
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Thanks Tweakie
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My pleasure sir ;)
Tweakie.