Disk drive employing a velocity profile and back EMF...

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

Reexamination Certificate

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Details

C360S075000

Reexamination Certificate

active

07068463

ABSTRACT:
A disk drive is disclosed comprising a disk having a plurality of tracks, an actuator arm, a head connected to a distal end of the actuator arm, and a voice coil motor (VCM) for rotating the actuator arm about a pivot to actuate the head over the disk. A driving current is applied to the VCM to control the motion of the actuator arm. A back EMF voltage generated by the VCM is detected, and a velocity of the VCM is estimated in response to the back EMF voltage. The estimated VCM velocity is compared to a target velocity in a velocity profile, wherein the velocity profile comprises at least an acceleration component and a coast component. The driving current is adjusted in response to the comparison so that the velocity of the VCM substantially follows the velocity profile.

REFERENCES:
patent: 4864437 (1989-09-01), Couse et al.
patent: 5568333 (1996-10-01), Bang
patent: 5600219 (1997-02-01), Gomez
patent: 5844743 (1998-12-01), Funches
patent: 6028744 (2000-02-01), Amirkiai et al.
patent: 6081112 (2000-06-01), Carobolante et al.
patent: 6097564 (2000-08-01), Hunter
patent: 6140791 (2000-10-01), Zhang
patent: 6212027 (2001-04-01), Lee et al.
patent: 6222696 (2001-04-01), Kim
patent: 6396652 (2002-05-01), Kawachi et al.
patent: 6441987 (2002-08-01), Lee
patent: 6441988 (2002-08-01), Kang et al.
patent: 6445531 (2002-09-01), Gaertner et al.
patent: 6535358 (2003-03-01), Hauert et al.
patent: 6597529 (2003-07-01), DeRose
patent: 6624964 (2003-09-01), Pirzadeh
patent: 6791785 (2004-09-01), Messenger et al.

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