[Mr.Chips]

I printed a 54 tooth gear for my South Bend lathe so I could cut 16 threads per inch, put it on the lathe and it only rotated about an inch. Measured the gear and it was 0.015” out of round.
If I had results like that from my CNC that would mean that the steps per inch were either off in the X or Y axis and I would set those to be correct and that’s it.

How Does the 3D printer address an out of round which either the X or the Y steps per inch is not set right, how do I adjust the steps per inch in my 3 D printer

My Printer: Maker Select Plus 3D Printer PN: 15711

Thanks my old homemade CNC machine is still going strong.
Thanks
Hager

[ger21]

First thing I'd do is print a calibration cube to make sure it's the steps/unit.

[steve323]

It might be that the X and Y axis are not perpendicular to each other. Circles (or gears) would become ovals.

Other possibilities include loose belts or pulleys creating backlash. One common possibility is a loose set screw on the belt sprocket attached to a stepper motor. If it is loose, the motor can turn several degrees before the belt starts to move.