Rebound behavior of the felt

In paper production the paper band is transported over a felt conveyer 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 behavior 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.

(MVA95)

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Laser sensors for displacement and position

More application examples in Eccentricity, diameter, concentricity

Bore hole depth Ovality inspection on brake pipes using vision4A Brake disc concentricity Coil unwinding Coil diameter Diameter - radial/axial runout - measurement at disk motors Stainless steel tubes for catalyst production Extruder bore diameter Bearing shell detection in automotive manufacturing Oscillation Diameter of a pulley Acquisition of the internal diameter of tubes Drive controller in precision respooling machines Defects in ovality Underwater Measurement of axial movement and shaft play Non-contacting roundness measurement for rollers Roller runout Washing machine displacement