Fabric travel direction monitor - registers fabric markings in groups to evaluate any travel line deviation

摘要

The system to detect deviations in the movement of textile fabrics has sensors to register the passage of markings on the fabric. Each sensor has a circuit to evaluate the behaviour of a gp. of successive markings along the line of fabric travel. The system gives an accurate measurement of fabric travel deviation, independently of the fabric travel speed, to deliver signals proportional to the degree of displacement from the true line of movement.