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General Mach Discussion / apparent loss steps?
« on: July 29, 2009, 10:47:09 AM »
Hi all, I am new to CNC and trying to work out the bugs of my new DIY kit from BuildYourCNC. I am not sure the make of the controller or breakout board but the steppers are 425oz motors and lead screws are 4tpi. I have done the math and have the steps set at 12800 for 1/16 and seems correct. I am using Aspire2 for my models.
While trying to cut a finish pass with 1/8" ball nose on an aspire example file the z axis is off by 0.330 after cutting about 8" of the model. I changed the "uS" setting to 5 and changed to 1/4 stepping (also did the math for changed stepping)... this resulted in being off 0.330 in less than 2". When I say off by 0.330 it is cutting too deep. Guess I should have mentioned I am running Mach3.
While trying to cut a finish pass with 1/8" ball nose on an aspire example file the z axis is off by 0.330 after cutting about 8" of the model. I changed the "uS" setting to 5 and changed to 1/4 stepping (also did the math for changed stepping)... this resulted in being off 0.330 in less than 2". When I say off by 0.330 it is cutting too deep. Guess I should have mentioned I am running Mach3.