Before processing and filling large bottles, the bottles must be fitted with holders. For this purpose, the holders are fed into a metal rail after singulation and then mounted on the bottle neck. To reliably detect the presence of the holders on the metal rail, a reflex light barrier is used and taught in on the static machine part. As soon as the light beam is interrupted, the sensor reliably recognizes the holders despite the presence of openings and regardless of the color and shape.
Reflex light barriers detect and control objects by evaluating the signal strength and the principle of angle measurement. Thanks to the dynamic readjustment of the switching threshold, dirt and temperature can be compensated. Teach-in enables even transparent objects with a defined background to be recognized without additional reflectors.
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