Head displacement measuring method and apparatus and data record

Details Head displacement measuring method and apparatus and data record Head displacement measuring method and apparatus and data record

1995-08-25

1997-08-05

Psitos, A.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

369 4413, 360 7717, 360 75, 360 31, G11B 5596

Patent

active

056548427

ABSTRACT:
In a head displacement measuring method, prior to actual data recording or data reproduction, either one of the recording head and the reproducing head is wobbled, and the test data is recorded in the disk-shaped recording medium by the recording head. Then, the test data is reproduced from the test data by the reproducing head, and displacement between the recording head and the reproducing head is detected on the basis of the reproduced test data. Thus, the displacement may be detected more easily with higher precision than with the conventional optical detecting method.

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patent: 4802033 (1989-01-01), Chi
patent: 4862294 (1989-08-01), Mihara
patent: 4967289 (1990-10-01), Kanota
patent: 5073833 (1991-12-01), Best
patent: 5235478 (1993-08-01), Hoshimi
patent: 5353170 (1994-10-01), Fung
patent: 5383070 (1995-01-01), Bond

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