Patent · US Active

Disk drive detecting disk boundaries using microactuator

US8300348B1 · kind B1 · utility

110Cited by

43References

24Claims

0Family size

Assignee

Western Digital Technologies, Inc. · US

Inventors

Yanning Liu · San Jose, US
Norman D. Gardner · Aliso Viejo, US

Key dates

Filing date	Jun 25, 2010
Grant date	Oct 30, 2012
Priority date	—
Expiry date	Nov 12, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG11B5/5547
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A disk drive is disclosed comprising a disk, an actuator arm, a head coupled to a distal end of the actuator arm, a voice coil motor (VCM) operable to actuate the head over the disk in coarse movements by rotating the actuator arm about a pivot, and a microactuator operable to actuate the head over the disk in fine movements. A disk boundary condition is detected by moving the actuator arm toward one of an outer diameter of the disk and an inner diameter of the disk, and monitoring an induced voltage generated by the microactuator. The disk boundary condition is detected when the induced voltage exceeds a threshold.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.