Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1988-08-05
1990-10-30
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360106, 360 75, 369247, G11B 555
Patent
active
049672932
ABSTRACT:
A magnetic disk storage apparatus in which a plurality of magnetic head positioners are independently driven with respect to each other. A housing having a sensor secured thereto indirectly senses mechanical vibration of a magnetic disk and issues a sense signal. The mechanical vibration is inevitably caused by a seek operation of a selected magnetic head positioner. Based on the sense signal, a compensating signal is generated in a mechanical vibration follow-up system disposed in the apparatus. The compensating signal is input to a coil of a driving motor of non-selected magnetic head positioners such that the effect of the mechanical vibration on the other positioners is cancelled. Thus, magnetic heads supported by the other positioners do not become off-track.
REFERENCES:
patent: 4040103 (1977-08-01), White
patent: 4331990 (1982-05-01), Frandsen
patent: 4423448 (1983-12-01), Frandsen
patent: 4616277 (1986-10-01), Berti
Patent Abstracts of Japan, vol. 9, No. 161, (P-370), Jul. 5, 1985; JP-A-60 035 377.
Aruga Keiji
Hatagami Toshifumi
Iwatsubo Masahito
Mizoshita Yoshifumi
Canney Vincent P.
Fujitsu Limited
Robertson David L.
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