How does rotary encoder work？！

The encoder is connected to the shaft servo motor for controlling the electrical supply to the engine and in turn provide positive current feedback control means their movement. Light (most common type) rotary encoder, there are two types of incremental encoders and absolute encoders. Use either (usually) metal disk (code disk) with evenly spaced grooves to allow and from LED (S) or other light source for phototransistor arrive (s) or block light. An engine shaft rotation, by grooves in the LED - generating a series of locations can be used to calculate the engine speed and acceleration, and phototransistor electrically on / off state of a current is used to determine the correct commands to the engine to Follow the desired motion profile.
Incremental encoder evenly spaced the same slot, and creates a constant speed uniform pulse sequence engine. Absolute encoder has a groove that is obtained at each incremental rotation of the electrical state of a unique combination of a plurality of rows. This type is used to drive the motor to a specific angular position and hold.
Magnetic encoder code wheel which can also track the status of a magnetic tape with a magnetic coating and run past the read head like a tape recorder records the read head. A magnetic or inductive proximity sensor can be used to pass the detection gear teeth as an incremental encoder. In the anti-lock braking system of an automobile by the encoder sensor comprising evenly spaced, which detects wheel bearing / rotating part of the brake disc function control component.

TRD-GK360-BZ
TRD-GK360-BZC2
TRD-GK360-RZ
TRD-GK360-RZC2
TRD-GK360-RZC2L
TRD-GK360-RZL
TRD-GK4000-BZ
TRD-GK4000-BZC2
TRD-GK4000-RZC2
TRD-GK4000-RZC2L
TRD-GK4000-RZL
TRD-GK400-BZ
TRD-GK400-BZC2
TRD-GK400-RZ
TRD-GK400-RZC2
TRD-GK400-RZC2
TRD-GK400-RZL
TRD-GK5000-BZ
TRD-GK5000-BZC2
TRD-GK5000-RZ
TRD-GK5000-RZC2
TRD-GK5000-RZC2L

Previous：What is incremental rotary encoder
Next：About Rotary Encoder