A 3-Phase stepping motor is to be used to drive a linear axis for a robot. The motor output shaft will be connected to a screw thread with a screw pitch of 5 mm. We want to be able to have a spatial control of at least 0.1 mm.
a) How many poles should the motor have?
b) How many pulses are needed from the controller every second to move the linear axis at a rate of 90 mm/second?