Method and apparatus for locating the edge of a magnetic tape

Details Method and apparatus for locating the edge of a magnetic tape Method and apparatus for locating the edge of a magnetic tape

1986-12-05

1988-11-22

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 67, G11B 2736, G11B 502

Patent

active

047869844

ABSTRACT:
A method and apparatus for magnetically detecting the edge of a magnetic recording tape to enable accurate positioning of a tranversely movable recording/playback unit at any of a plurality of track locations across the width of the tape. The gain of a playback amplifier is first dynamically adjusted in response to a played back periodic test signal based on the number of flux transitions detected during playback of a given length of tape, and an edge of tape reference position thereafter establishing by comparing the number of flux transitions detected during the playback of a periodic test signal recorded along the edge of a given length of tape when the recording/playback unit is successively stepped toward the edge of the tape.

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