Motor knowledge: servo motor and encoder

First note about servo motor

1. The main function of the servo motor is for high-precision positioning. Basically, the pLC is used to pulse through the private service driver to achieve the positioning effect, and the encoder behind the private service motor can feedback the stroke of the servo motor and the pulse from the PLC. Compare to achieve a closed loop system

2. The servo motor is only a motor that accepts commands to complete certain actions. Ordinary motors can also be used as servo motors. Therefore, there are many types of servo motors; the servo system is much more complicated.

3. DC motor plus encoder, plus encoder is only to achieve the closed loop, the servo system has a lot of detail control, such as torque, over torque.

4. Divided into two major categories of DC and AC servo motors.

5. The working principle of the encoder domain

1. Transmissive rotary photoelectric encoder
2. Encoder resolution
3. Classification and characteristics of the encoder: According to the working principle, it can be divided into incremental and absolute
4. Servo motor and encoder work: the controller drives the motor to run, and the motor rotates with the encoder.
The feedback signal from the encoder is sent to the controller to know the speed of the motor and the position of the move. Or the distance moved. According to the feedback signal, the conversion is performed and the control action is performed.
------In fact, it is closed loop feedback


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