Servo systems are used to provide precise motion control in applications such as industrial automation, robotics, and CNC machines. Servo motors and servo drives (servo amplifiers) can perform different types of control, such as speed, torque, and position control. Here are the descriptions of these control types and the differences between them:

    Speed control: Speed control is the process of regulating the rotational speed of the servo motor. Speed control is essential for applications that require continuous high-speed operations or movement at a specific speed. Speed control is achieved by adjusting the motor current through the servo drive.

    Torque control: Torque control involves precisely regulating the rotational force or torque of the servo motor. Torque control is used to better manage the motor's load and motion. The servo drive compares the real-time torque value with a predetermined torque value and adjusts the motor's torque according to the requirements.

    Position control: Position control is the process of accurately adjusting the angular position of the servo motor. This type of control is essential for motors that need to move to a specific position or angle. Position control allows the servo drive to adjust the motor's angular position based on information received from feedback elements (e.g., encoders or resolvers).

Differences:

    Speed control focuses on the motor's rotational speed, while torque control focuses on rotational force, and position control focuses on angular position.

    Speed control supports continuous high-speed operations, torque control provides load and motion management, and position control is used for precise positioning.

    Different applications require different types of control, and in some cases, a combination of multiple control types may be necessary.

Servo systems, by offering these three types of control on a single platform, provide high precision and performance for industrial and robotic applications.