What Is a Servomotor Encoder and How Does It Work?


With the rapid development of industrial automation, there is an increasing demand for precision and response speed in motion control. In modern motion control systems, servo motor encoders play a crucial role.
1. The Development History of Servo Motor Encoders
Early motion control systems often had low accuracy and slow response speed. With the continuous advancement of technology, people's demands for motion control are increasing, and servo motor encoders have emerged. Its emergence greatly improves the performance of motion control systems, enabling devices such as CNC machines and robots to achieve high-precision position control and fast dynamic response.
2. What is a servo motor encoder?
A servo motor encoder is a sensor used to measure the rotational position, speed, and direction of a 3 phase servo motor. Its basic concept is to provide accurate feedback information to the motion control system by converting the mechanical motion of the motor into electrical signals. In the motion control system, the servo motor encoder plays a crucial role as it can monitor the real-time operation status of the motor, enabling the control system to accurately control the position, speed, and acceleration of the motor, thereby achieving high-precision motion control.
3. Working principle of servo motor encoder
Servo motor encoders typically use principles such as optoelectronics, magneto electricity, or capacitance to monitor motor rotation. Taking the photoelectric encoder as an example, it consists of a light source, a encoder disk, and a photodetector. The code wheel is engraved with a series of grating stripes, and when the motor rotates, the code wheel also rotates. The light emitted by the light source passes through the grating stripes of the encoder and is received by the photodetector, which converts the light signal into an electrical signal. By processing electrical signals, information such as the rotational position, speed, and direction of the motor can be obtained. The encoder converts this information into a specific electrical signal format for use by the control system. The control system adjusts the driving signal of the motor based on the feedback information from the encoder, achieving precise control of the motor.
4. The relationship between servo motor and encoder
The servo motor and encoder are two components that work closely together. The 3 phase servo motor is responsible for providing power and driving the load to move. The servo motor encoder monitors the rotation of the motor in real time, providing accurate position feedback information for the control system. Working together can improve the accuracy and response speed of the system. In the motion control system, the feedback information from the encoder is used for closed-loop control. The control system compares the position information fed back by the encoder with the target position, and then adjusts the driving signal of the motor to continuously approach the target position. This closed-loop control method can effectively improve the accuracy and stability of the system.
In summary, servo motor encoder is an indispensable and important component in modern motion control systems. It provides accurate position feedback information to the control system by monitoring the rotation of the motor, enabling the system to achieve high-precision motion control. The collaborative work of servo motors and encoders can greatly improve the performance of the system. If you need a high-quality servo encoder, Baolong is your most reliable choice.