The speed of the stepping motor depends on the pulse frequency, the number of rotor teeth and the number of beats. Its angular velocity is proportional to the pulse frequency and synchronized with the pulse in time. Therefore, when the number of rotor teeth and the number of running beats are fixed, the required speed can be obtained by controlling the pulse frequency. Since the stepper motor is started with the help of its synchronous torque, the starting frequency is not high in order to avoid losing step. Especially with the increase of power, the rotor diameter increases and the inertia increases. The starting frequency and the maximum operating frequency may differ by more than ten times.

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.