The servo motor is positioned by pulses. When the servo motor receives 1 pulse, it will rotate the angle corresponding to 1 pulse. Each time the motor rotates by an angle, the encoder will send out a corresponding number of feedback pulses, and the feedback pulses and the pulses received by the servo driver form a closed-loop control, so that the servo driver can precisely control the rotation of the motor to achieve precise positioning. Servo motor control: Generally, industrial servo motors are controlled by three loops, namely current loop, speed loop and position loop, which can feedback the angular acceleration, angular velocity and rotational position of the motor respectively. The chip controls the drive current of each phase of the motor through the feedback of the three, so that the speed and position of the motor can be accurately run as scheduled.