The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2012
Filed:
Jun. 25, 2010
Yanning Liu, San Ramon, CA (US);
Norman D. Gardner, Mission Viejo, CA (US);
Yanning Liu, San Ramon, CA (US);
Norman D. Gardner, Mission Viejo, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
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.