[其他] 钻井的，这里的post和encoder什么意思啊？

11.5.13
Drilling rig aux system

11.5.13.1 Motor local control box

Common motor operating post: 30sets;

Explosion-proof motor operating post: 40sets;

Operating post is used to start and stop motor beside the motor where motor local control is needed.

Start/stop button and start indicator are fitted on the operating posts.

11.5.13.2 Encoder

Manufacturer: import

4 DW encoders，1 RT encoder，1 BF encoder，1 DRUM encoder

DW/BF encoders are used for the motor closing loop control. Improve motor control accuracy, and realize max.output torque at nil rotation speed;

RT encoder is used to measure rotary table rotation speed;

DRUM encoder is used to calculate the Hook position, and realize hook electric protection.