Keterangan

Rebound behaviour of the felt

In paper production the paper web is transported over a felt from the screen station to the pressing station. This felt removes the residual moisture from
the paper. For water separation the felt passes a defined gap between the central and the suction
roller. The wear and the rebound behaviour of the felt determine the hygroscopy and are thus of decisive
importance for the paper quality.
Laser-optical position measuring systems monitor the wear at a guide roller. Measuring with two sensors
compensates the ovality / stroke of the guide roller. The result of the measurement is the effective
thickness of the felt. If the measured value falls below the specified limits of wear, the production can be
stopped and the felt can be replaced. Because of the difficult environmental conditions the sensors are
installed in a protective housing.

Reasons for choosing the system- Non-contact displacement measuring
- small spot diameter
- long stand off distance
- High accuracy
- High frequency response