A stepper motor is an electric motor that converts an electrical pulse signal into a corresponding angular displacement or linear displacement . Each time a pulse signal is input , the rotor rotates an angle or moves forward one step. The angular displacement or linear displacement output is proportional to the number of pulses input, and the speed is proportional to the pulse frequency . Therefore, a stepper motor is also called a pulse motor . The control of a stepper motor is achieved by inputting a pulse signal. Each pulse signal causes the stepper motor to rotate a fixed angle, called the step angle. By controlling the frequency and sequence of the pulse signal, the speed and direction of the stepper motor can be controlled.
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