Hi Neal - I'm not a M3 user so can't help there. But with a stepper system there is no feedback to the controller. The controller sends out a step and direction impulse and does not know if the motor moved or not. My suggestion is to disconnect the motors from the machine so you can see the axles moving (or not) and work through the M3 config on one axis until it works. Then you can correct the other axes. cheers Peter