Magnetic recording apparatus for correcting the absolute track p

Details Magnetic recording apparatus for correcting the absolute track p Magnetic recording apparatus for correcting the absolute track p

1989-03-21

1991-09-17

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7704, 360 7706, 360 7804, 358906, G11B 2102

Patent

active

050500147

ABSTRACT:
Positioning of a magnetic head for recording a signal on a magnetic recording medium is performed in accordance with an absolute track address system. However, due to mechanical errors, expansion or contraction of the magnetic recording medium caused by changes in temperature or humidity, or small variations between recording apparatuses, a deviation can occur between a position recorded on in the past and a absolute track position thereof. Accordingly, with regard to at least one track that has already been recorded on, the amount of deviation between the peak position of the envelope of a signal on this track and an absolute track position is measured. Then, based upon the measured amount of deviation, the position at which the magnetic head is stopped on the track to be recorded on next is corrected.

REFERENCES:
patent: 4445153 (1984-04-01), Fujimoto et al.
patent: 4800448 (1989-01-01), Kaneko et al.
patent: 4825324 (1989-04-01), Miyake et al.
IBM TDB, vol. 19, No. 6, "Self Calibrating Disk Storage Apparatus", Griffiths et al., 11/76, pp. 1991-1992.

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