Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1988-10-14
1991-03-19
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 69, 360 7804, G11B 1546, G11B 1928
Patent
active
050015788
ABSTRACT:
In a recording and reproduction apparatus, a recording medium is rotation-driven by a spindle motor, and a carriage having magnetic heads for seeking on the recording medium is driven by a voice coil motor. When a rotation velocity of the recording medium during acceleration and deceleration periods in a seeking-operation of the magnetic head is within an allowable range, a supply of a driving-current to the spindle motor is stopped in accordance with a level of a driving-current supplied to the voice coil motor. A consumption current of the recording and reproduction apparatus can be reduced without degrading performance of the apparatus.
REFERENCES:
patent: 4680746 (1987-07-01), Senso
patent: 4709279 (1987-11-01), Sano
IBM Journal of Research and Development, Feb. 1980, pp. 41-44, "The IBM 3370 Head-Positioning Control System".
Research Implementation Report, vol. 28, No. 10 (1979), pp. 179 to 194, "800 Mega-Bytes Magnetic Disc Devices Peripheral Circuit".
Tricheps (Transliterated) "Servo Technique Implementation Manual", pp. 31--38 to 31-11 (1983), "Spindle Rotation Number Control".
Heinz A. J.
Kabushiki Kaisha Toshiba
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