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General Mach Discussion / Z axis not repeatable
« on: December 01, 2014, 06:29:25 PM »
I have a machine that is having a problem with the Z axis. I am running a tool path that is generated from Aspire and it turns out to have about 85000 lines of code with almost all of them having a Z component. When completed and returning to 0,0,0 the Z axis is off by about .070". I have slowed the speed down to around 25 inches/minute (half of what it was) and still have the same problem. The motors on all three axis are identical and the problem is not evident on the X and Y. I am wondering if it is some sort of round off error on the Z axis since the Z axis has so many moves and it is a stepper system. The post processor for Aspire produces 4 decimal places which is the same as what Mach3 has. I ran the axis calibration and Mach3 returns a number that is not an integer.
Does the number need to be an integer?
With so many Z moves of such small increments I am thinking that it is round off error.
Any thoughts would be appreciated.
Tim
Does the number need to be an integer?
With so many Z moves of such small increments I am thinking that it is round off error.
Any thoughts would be appreciated.
Tim