The speed of the stepper motor depends on the pulse frequency, the number of rotor teeth and the number of shots. The angular velocity is proportional to the pulse frequency and is synchronized with the pulse in time. Therefore, in the case of rotor tooth number and operation number, the desired speed can be obtained as long as the pulse frequency is controlled. Since the stepper motor is initiated with the help of its synchronous torque, the starting frequency is not high in order to not fail. Especially with the increase of power, the rotor diameter increases, the inertia increases, the starting frequency and the maximum operating frequency may be 10 times times different.