Technique for detecting stiction error in hard disk drive

Details Technique for detecting stiction error in hard disk drive Technique for detecting stiction error in hard disk drive

1997-12-18

2000-06-06

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 7303, 360 75, G11B 1518

Patent

active

060726520

ABSTRACT:
A hard disk drive rapidly shakes a voice coil motor to remove a stiction error caused by a friction force between a head and a disk. A start-up oscillator generates a spindle motor rotation control frequency according to a level of a spindle motor driving control voltage and controls a rotation of a spindle motor according to the spindle motor rotation control frequency. A restart oscillator generates a restart control signal for controlling the level of the spindle motor driving control voltage to restart the rotation of the spindle motor. A resistor is interposed between the restart oscillator and ground, to allow the restart control signal to control the level of the spindle motor driving control voltage, so as to prevent the spindle motor from being restarted. A microcontroller monitors the level of the spindle motor driving control voltage to detect a stiction error and provide a voice coil with a voice coil shaking control signal upon a detection of the stiction error.

REFERENCES:
patent: 4646557 (1987-03-01), Park
patent: 4809248 (1989-02-01), Sengoku
patent: 4970610 (1990-11-01), Knappe
patent: 5115664 (1992-05-01), Hegde et al.
patent: 5117315 (1992-05-01), Nagasaki et al.
patent: 5384675 (1995-01-01), Crawforth et al.
patent: 5397971 (1995-03-01), McAllister et al.
patent: 5428284 (1995-06-01), Kaneda et al.
patent: 5530602 (1996-06-01), Boutaghou et al.
patent: 5539592 (1996-07-01), Banks et al.
patent: 5682334 (1997-10-01), Plutowski et al.
patent: 5801505 (1998-09-01), Lee et al.

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