Stepping motor is also known as pulse motor. Based on the most basic electromagnet principle, it is an electromagnet that can rotate freely. Its action principle is to generate electromagnetic torque by relying on the change of air gap permeability. Cheap microcomputers appear in a multifunctional manner, and the control methods of stepping motors are more flexible and diverse.

Stepping motor is a kind of motor that converts electric pulse signal into corresponding angular displacement or linear displacement. Each time a pulse signal is input, the rotor will turn an angle or move forward. Its output angular displacement or linear displacement is proportional to the number of input pulses, and the speed is proportional to the pulse frequency. Therefore, stepping motor is also called pulse motor.