Transparent very bright or shiny objects may remain

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: nsor Disadvantages of retroreflective sensors 6.3.3 Notes on application • Enhanced reliability because of permanent light during non-operation. • Simple installation and adjustment. • Object can be diffuse reflecting, mirroring or transparent as long as a sufficiently high percentage of the light is definitely absorbed. • In most cases, a greater range in comparison with diffuse sensors. • Transparent, very bright or shiny objects may remain undetected. © Festo Didactic GmbH & Co. KG • FP 1110 83 6. Optical proximity sensors Notes • In the case of transparent objects, the light beam passes the object twice and as a result is attenuated. It is possible to detect objects of this type by means of an appropriate potentiometer setting. • Reflecting objects must be arranged in such a manner to ensure that the reflection does not hit the receiver. • With particularly small objects, an orifice in the light beam can improve the effectiveness. • Failure of the emitter is evaluated as "object present". • Reflectors can deteriorate with age and dirt;...
View Full Document

Ask a homework question - tutors are online