I'm doing my research on what will be my first CNC build and have a haunting problem about the stepper motors: you can harvest them from old equipment, buy them used or new. So:
do all 3 motors on a 3 axis machine need to be the same to for the cnc program to run or can they be mix and match?
do you typically need to enter the variables into the cnc program, like details of the motor (degrees, phase, amps, oz, etc) and the drive mechanism (thread pitch) so the machine will be able to drive the tool correctly?
Any input would be appreciated.