Servo motor refers to the electric motor that drives the operation of mechanical elements in the servo system. It is a controllable mechanical electromagnetic device for mechanical energy conversion and signal conversion in the precision motion control. A servo motor is designed to provide precise control and positioning of a shaft. It operates by rotating the shaft to a specific angular position and holding it in that position. The desired position of the shaft is specified by a control signal, which is typically a pulse-width modulation (PWM) signal. The duration of the PWM signal determines the desired position of the servo. The servo motor consists of a motor, a gear train, a control circuit, and a position feedback mechanism. The motor rotates the shaft, the gear train increases the torque and reduces the speed of the output shaft, and the control circuit controls the operation of the motor based on the input from the position feedback mechanism. The position feedback mechanism, such as a potentiometer, provides information on the actual position of the shaft, which the control circuit uses to make adjustments to the motor to maintain the desired position. Servo motors are commonly used in a variety of applications that require precise control and positioning, such as robotics, automation, and control systems. They are particularly useful in applications where accuracy and stability are important, such as in the control of robots, aircraft, or industrial machinery.