Method and apparatus for controlling reel-to-reel tape transport

Details Method and apparatus for controlling reel-to-reel tape transport Method and apparatus for controlling reel-to-reel tape transport

1988-05-25

1991-07-16

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 7304, 242 755, G11B 1546, B65H 5900

Patent

active

050329383

ABSTRACT:
A magnetic head is provided in a tape transport path along which a magnetic tape is transported from one reel directly to another reel. In order to record or reproduce data to or from the magnetic tape with the magnetic head while the magnetic tape travels, it is necessary to stabilize a tape velocity at the magnetic head position to a desired velocity. The tape velocity at the magnetic head position is determined based on tape velocities at the respective reel positions, a tape path length from the head to one reel and a tape path length from the head to the other reel, and a closed loop control is effected by using the tape velocity at the magnetic head position to match the tape velocity to a desired velocity.

REFERENCES:
patent: 3584805 (1971-06-01), Lee
patent: 4125881 (1978-11-01), Eige et al.
patent: 4448368 (1984-05-01), Skalko
patent: 4525654 (1985-06-01), Tajima et al.
patent: 4531166 (1985-07-01), Anderson
patent: 4644436 (1987-02-01), Unno
patent: 4788606 (1988-11-01), Uchikoshi
IBM Technical Disclosure Bulletin, vol. 14, No. 2, Jul. 1971, Tape Reel Motor Control System, Werner.
IBM Technical Disclosure Bulletin, vol. 14, No. 6, Nov. 1971, Electronic Tape Speed Control, Penny.

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