A geared stepper motor is a motor that combines a stepper motor and a gear reducer. It consists of three parts: the motor body, the reducer, and the encoder. The reducer reduces the speed and increases the torque, while the encoder is used to feedback the rotation of the motor. The working principle of the geared stepper motor involves two aspects: the motor body and the reducer. The motor body uses the magnetic field to achieve rotation, and the magnetic field between the stator and the rotor causes the rotor to rotate around the stator