I have PM25mv with Arizona cnc conversion kit
im using windows 10
i7 laptop
mach3 demo latest version
stepperonline 566 ozin closed loop stepper 4.0 driver for x and y
stepperonline 1699 ozin closed loop stepper 4.0 driver for the z
amazon no name brand usb controller

Hello guys, I need all the help I can get.

My issue:

I calibrated the x and y to travel 5" and its spot on in both directions for both x and y. When I cut a round pocket it is Undersized by 0.120" I tried calibrating the motors to give me 1" accurate holes, but when I retest the motor calibration and instruct it to move 5", it travels to far, like 5.25" bad controller board? a setting? the Z axis is the only one that is accurate.