Controlling web tension by actively controlling velocity of danc

Details Controlling web tension by actively controlling velocity of danc Controlling web tension by actively controlling velocity of danc

1995-01-31

1997-08-19

Cabeca, John W.

Electricity: motive power systems

With particular motor-driven load device

Tension-maintaining type of motor-control system

226195, 2424139, 318434, B65H 5938

Patent

active

056592299

ABSTRACT:
This invention pertains to processing continuous webs such as paper, film, composites, and the like, in dynamic continuous processing operations. More particularly, it relates to controlling tension in such continuous webs during the processing operation. Tension is controlled in a dancer control system by connecting a corresponding dancer roll to a servo motor or the like, sensing position, tension, and velocity parameters related to the web and the dancer roll, and providing active gain force commands to cause translational movement in the dancer roll to control temporary, short-term tension disturbances in the web. In some applications of the invention, the dancer control system is used to attenuate short-term tension disturbances. In other applications of the invention, the dancer control system is used to create short-term tension disturbances.

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