3D Printing Dictionary
A stepper motor is a special DC motor with many coils. The motor spindle 'steps' between these coils to achieve predictable and accurate movement. A stepper motor is different from a servo as a servo features feedback for controlled positioning. Common stepper motors are usually indicated by a NEMA standard. Be sure to check the datasheet for the stepper motor you plan on ordering for wiring, shaft diameter, depth and bolt placement tolerances.