Method and apparatus for variably controlling the speed of a...

B - Operations – Transporting – 65 – H

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Details

B65H 43/00 (2006.01) B05C 11/00 (2006.01) B65H 23/188 (2006.01)

Patent

CA 2087825

A method and apparatus is provided for controlling the speed of a slave drive roller in a coating machine. Speed of the slave drive roller at a second coater is regulated by an adaptive gain allowing greater tolerances when not at run speed. That is, in addition to normal speed correction, the system accommodates greater web speed fluctuation during threadup, acceleration, and deceleration. This accommodation may be based on the sensed position of the float roller or, alternatively, on the sensed rate of acceleration/deceleration of the master drive roller.

Méthode et dispositif utilisés pour régler la vitesse d'un rouleau d'entraînement secondaire d'une coucheuse. La vitesse du rouleau d'entraînement secondaire est réglée par un mécanisme à gain adaptatif qui autorise des tolérances plus importantes que lorsqu'il n'est pas utilisé à la vitesse normale. Cela signifie, qu'en plus de la correction de la vitesse normale, le système tolère une plus grande fluctuation de la vitesse de la bande continue de papier pendant son engagement dans la machine, son accélération et sa décélération. Cette adaptation peut être basée sur la position détectée du rouleau flottant ou, autrement, sur le taux détecté d'accélération/de décélération du rouleau d'entraînement principal.

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