Reel-to-reel drive with speed control

Details Reel-to-reel drive with speed control Reel-to-reel drive with speed control

1976-05-10

1978-06-13

Dobeck, B.

Electricity: motive power systems

With particular motor-driven load device

Tension-maintaining type of motor-control system

318 72, 318 78, H02P 546

Patent

active

040951464

ABSTRACT:
Long and short term variations in the speed at which a magnetic tape is moved with respect to a read and/or write head are minimized by maintaining the product of the speed of the tape payout and take-up reels constant. In accordance with a preferred embodiment the rotational speed of the payout reel and the rotational speed of the take-up reel are sensed and effectively multiplied to derive a signal which is compared with a predetermined constant magnitude reference signal. The result of the comparison is an error voltage which is employed to energize and thus control the speed of the drive motor for the take-up reel.

REFERENCES:
patent: 3644806 (1972-02-01), Belson et al.
patent: 3704401 (1972-11-01), Miller
patent: 3733529 (1973-05-01), Ross et al.
patent: 3913866 (1975-10-01), Hankins

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