Servo Motor Encoder Optical Encoder
Each servo motor is including a optical encoder. If a servo motor does not have a encoder, it can not be called servo motor. Encoder feedback function is important for servo motor. Servo motor has the obvious advantage in precise positioning than stepper motor in precise control system. Stepper motor is an open loop system. Servo motor is closed loop system. Servo motor system has higher anti-vibration even when low speed operation.