Method and system for tape edge sensing

Details Method and system for tape edge sensing Method and system for tape edge sensing

1992-03-31

1994-12-27

Denion, Thomas E.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7701, G11B 2102

Patent

active

053770579

ABSTRACT:
A method and system are disclosed for improved edge detection on tapes. By use of a nominal tape having a 100% output, a write head writes with a given write current onto the nominal tape and the output level is read with a read head during a calibration procedure in order to determine a reference level for the 100% nominal tape. Thereafter, when a given tape is being used, by use of the same write current, a signal is written on the given tape and is subsequently read to create a read output. That read output is compared to the reference level output derived during the calibration to create a correction factor. The correction factor is then employed to correct a trigger point utilized during a subsequent tape edge determination.

REFERENCES:
patent: 4476503 (1984-10-01), Solhjell
patent: 4786984 (1988-11-01), Seeman
patent: 4802030 (1989-01-01), Henry et al.
patent: 4977468 (1990-12-01), Aruga et al.
patent: 5111347 (1992-05-01), Ono et al.

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