What is the function of encoders in a servo system?！

1. Servo drives and encoders are two essential components that make up the servo system. The servo drive control section reads the encoder to obtain: rotor speed, rotor position, and mechanical position, which can be done:
A, servo motor speed control
B, the servo motor torque control
C, mechanical position synchronization tracking (multiple transmission points)
D, fixed-point parking
2, the type of encoder is very large, the most commonly used are absolute encoder, incremental encoder and resolver,
There are some higher communication coders. For the servo, in order to get a very high performance and precision
Degree, you must improve the resolution of the encoder, the commonly used servo encoder 2000-2500 lines (pulse number /
Turn), but the higher the number of lines, the more expensive encoder prices, it is necessary to understand the control system requirements to
Choose the most suitable encoder
3, for the incremental encoder, the most commonly used, but the biggest problem is: loss of power position, so to protect
Hold the power position, you can use the absolute encoder; if the mechanical vibration, the use of optical encoder
It is not appropriate, this is the need to use resolvers.

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