Tape transport control system with a feedforward capstan drive t

Details Tape transport control system with a feedforward capstan drive t Tape transport control system with a feedforward capstan drive t

1990-03-08

1993-09-28

Matecki, Katherine

Winding, tensioning, or guiding

Reeling device

Fishing rod reel

318 7, 360 7309, 360 964, G11B 1543

Patent

active

052481123

ABSTRACT:
A feedforward circuit applies a capstan drive current, or its equivalent, to the reel tension servo circuits whose associated reels are transporting the tape. The additional drive current to the reel drive motors increases the rotational velocity of the reels to maintain the same resultant acceleration between the tape driven by the capstan and the tape being transported between reels. Since the tape pack affects the gain of the feedforward circuit, a preselected average gain corresponding to the mean tape pack diameter is used to match different cassette sizes. A microprocessor may be used to provide the various signals and may vary the gain of the feedforward circuit not only in response to reel size but also in response to instantaneous reel tape pack diameter.

REFERENCES:
patent: 2909337 (1959-10-01), Lahti et al.
patent: 3807654 (1974-04-01), Hall, Sr.
patent: 4347994 (1982-09-01), de Boer
patent: 4400745 (1983-08-01), Shu
patent: 4461433 (1984-07-01), Kani
patent: 4461443 (1984-07-01), Kani
patent: 4513229 (1985-04-01), Kudelski

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