Parallelism measurement with angular prism
The laser beam is directed along the machine (the base line), but perpendicular to the measurement object. The principle is based on the beam being angled at 90° with the aid of an angular prism. In this way it is possible to measure a large number of objects on long machines by moving the angular prism along the machine in the direction of the laser beam. The detector (mounted on a magnet base, for example) is placed on the front and rear end of the measurement object. The results show the squareness in relation to the reference line graphically and digitally. A completed measurement shows the mutual parallelism of the measurement objects (e.g. rolls) in relation to the base line or one of the measurement objects. Machines of up to 80 meters in length and with 150 rolls/objects can be measured.