Method and system for controlling web speed

Details Method and system for controlling web speed Method and system for controlling web speed

1975-10-15

1977-03-15

Schacher, Richard A.

Advancing material of indeterminate length

Processes

Intermittently or interruptedly

226 42, 226 44, 226117, B65H 2504

Patent

active

040119769

ABSTRACT:
A method and apparatus to reduce ripple in the signal produced by a transducer attached to a dancer roll, or web accumulator, where cyclic web motion is present. Two transducers are used, one to produce a dancer roll position signal, and another, responsive to the cyclic web drive, to produce a signal corresponding to the ripple component of the dancer roll position signal. An adder combines both signals to generate a third, ripple free signal indicative of the average dancer roll position in the web accumulator. This ripple free signal may be used to control the web speed.

REFERENCES:
patent: 3045360 (1962-07-01), Alexeff
patent: 3087663 (1963-04-01), Anderson
patent: 3613975 (1971-10-01), Knight
patent: 3724733 (1973-04-01), Schaffer

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