Ultrasonic Fork Frame Light Barrier

Labelling always means precision work at maximum speed. Conventional optical fork frame light barriers fail where transparent labels, printed with metal particle lacquers, are to be detected on transparent backing films. The new ELTROTEC ultrasonic fork frame light barrier FA 98 ULTRA has been developed to meet exactly these demands and is working at a precision rate of 100% when triggering labelling machines. With its rim width of 3mm and a fork depth of 70 mm it can be applied for various labels and, due to its depth, even reaches significant trigger points located further on the inside of a carrier material. High repeatability is ensured with a switching frequency of 1 KHz and the sim-ple adjustment of rims and gaps via teach-in. Because of ultrasonic principle there are no effects of extraneous light on the sensor. Also available from ELTROTEC are optical forks of identical type with a breadth of 12 mm, rim width of 3 and 5 mm and a switching frequency of 10 KHz of the FA 98 S series as well as capacitive label sensors for all label types with up to 30 KHz switching frequency for the detection of splices, hot stamp, high carbon ink, clear on clear or tear tape.