Introduction to the JEL Reflective Mapping Sensor

Basic Operating Principle of the Sensor

The reflective Mapping Sensor is a type of sensor that detects position, distance, or objects using optical reflection principles.
It consists of a light-emitting end and a light-receiving end.
Its core concept is:
Light emission → Object reflection → Light reception → Analysis of position or intensity changes.
This is used as the basis for wafer presence detection and anomaly inspection.

Brand and Model Used

Main Manufacturer: Nordson
Sensor model: EX-43Q
 

Installation Method

Mounted on the Wrist_block using a fixed bracket.
 

Applicable JEL Models

Suitable for the S series, M series, L series, and G series.

Main Advantages

1. Requires only a small installation space
2. Can be used in confined spaces with limited angle and distance

 

Disadvantages

1. Easily affected by ambient light
2. Accuracy may vary depending on the reflective properties of materials
3. Glass, mirror surfaces, and black objects may cause errors
4. Insufficient reflection strength when the distance is too great
5. Higher cost compared with through-beam sensors

 

Conclusion

This type of sensor is mainly used for mapping in environments where space is limited or where angle/distance constraints exist.
Compared with through-beam sensors, it still falls short in stability, accuracy, and resistance to interference.
However, it remains suitable for applications constrained by space and detection angles.
If there are any concerns regarding system configuration, please contact our company for further discussion.