Method and apparatus for measuring and removing rotational variability from a nip pressure profile of a covered roll of a nip press

摘要: Multiple groups of sensors are circumferentially spaced apart at each cross-directional position along a sensing roll nip press to measure and cancel or nearly the effects rotational variability which may be acting on roll. The strategically-placed designed pressure being placed against web that is advanced through press. average measurements multiple circumferential provides good cancellation any might found In this manner, more true measurement profile can obtained better adjustments made reduce variability. addition, used as predictor cover bearing failures, resonant frequencies other anomalies.