Encoders

1. What are Encoders?

An encoder is a photoelectric sensor that converts mechanical displacement into an electrical signal. It uses a code disk, optical grating, or magnetic grating structure to measure angle or position. Based on their operating principle, they are categorized as follows:

Incremental Encoders: Output A/B phase pulse signals, using phase difference to determine direction of rotation (such as the Omron E6B2 series).

Absolute Encoders: Directly output binary/Gray code position values (such as the Heidenhain ERN480).

Hybrid Encoders: Combine the advantages of the previous two (such as the Tamagawa TS series).

 

2. What are the Core Parameters of Encoders?

Indicator	Typical Range	Impact Dimensions
Resolution	1-65536 CPR	Control Accuracy
Response Frequency	0-300kHz	Maximum Speed
Protection Rating	IP54/IP67	Industrial Environment Adaptability

 

3. What are the Typical Application Scenarios of Encoders?

Servo Control Systems: Closed-loop motor feedback (such as the encoders for Yaskawa Σ-7 drives).

CNC Machine Tools: Spindle positioning (Fanuc system-specific encoders).

Robot Joints: Multi-turn absolute encoders ensure ±0.01° repeatability.

 

4. Selection Recommendations for Encoders

Magnetic encoders (such as Baumer MAGRES) are preferred for high-vibration environments.

Dusty environments require sealed structures (such as the SICK Sendix series).

For long-distance transmission, an SSI interface (such as the Pepperl+Fuchs ROQ series) is recommended.