Method and apparatus for tracking control

Details Method and apparatus for tracking control Method and apparatus for tracking control

1982-02-23

1985-10-22

Richardson, Robert L.

Dynamic magnetic information storage or retrieval

Record editing

360 77, G11B 2100

Patent

active

045492344

ABSTRACT:
A method and apparatus for controlling the movement of a record medium, such as a tape, having skewed record tracks which are scanned by a transducer, such as a playback head. The record medium is commanded to be transported at a speed and for a distance which may be arbitrarily variable. While the record medium is moved, successive record tracks are scanned by the transducer; and the phase difference between the scanned track and the scanning trace of the transducer is detected. The speed at which the record medium is transported is derived from the command; and this speed is adjusted as a function of the detected phase difference.

REFERENCES:
patent: 3943562 (1976-03-01), Opelt
patent: 4139872 (1979-02-01), Tachi
patent: 4161001 (1979-07-01), Sakamoto
patent: 4163993 (1979-08-01), Ravizza et al.
patent: 4190869 (1980-02-01), Ota
patent: 4241365 (1980-12-01), Koda et al.
patent: 4255768 (1981-03-01), Kubota
patent: 4276571 (1981-06-01), Sakamoto
patent: 4296443 (1981-10-01), Sakamoto et al.
Japan, Patent Abstracts, vol. 6, No. 2, Jan. 8, 1982, Patent No. 56-127926.

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