Sensing rollers detect the surface, contours or edges of workpieces

Functions

• Recording of switching times at the beginning and end of workpieces during their machine cycle
• In conjunction with a copying unit: maintaining a defined distance between tool and workpiece

Quality deficiency, observation

• Irregular milling pattern
• Uneven, deeper milling strokes

Possible causes

1. Milling chips lie on the workpiece and are traversed by the sensing roller

• Remedy: Check extraction of the preceding milling units

2. Contamination of the running surface of sensing rollers

• Glue adhesion, chips
• Check and optimise glue quantity
• Check extraction

3. Unevenly worn contact surfaces of sensing rollers

• See pictures 1, 2
• Sluggish bearing or blocked sensing roller rotation
• Impurities and chips brake or block the travel of the sensing roller
• Roller wears out selectively and tool engages deeper into the workpiece at these points

Test possibility/ Remedy

• Check the sensing rollers and wipers regularly, check for smooth running and clean
• In case of wear and tear, the roll must be replaced.