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General Mach Discussion / Y-Axis

« on: January 08, 2016, 12:00:50 PM »

I have a problem with my y axis. If I drill a series of holes on 2" centers  the first hole always starts at 1.75". Then the 2nd is 1.875. All others after are spot on. The X axis works fine. Both axis are setup identical as far as motor, and pulses.
I ran the same program with 2 different post processors with the same result
Can anyone help?