Disk drive executing jerk seeks to rotate pivot ball bearings relative to races
US8780479B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2013 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Jun 24, 2033 |
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 comprising a plurality of tracks, a head attached to a distal end of an actuator arm, and a voice coil motor (VCM) operable to rotate the actuator arm about a pivot bearing including a race and a plurality of ball bearings. The VCM is controlled to execute a first jerk seek in a first radial direction so that the ball bearings slip within the race by a first rotation angle. The VCM is controlled to execute a second jerk seek in the first radial direction so that the ball bearings slip within the race by a second rotation angle, wherein the second rotation angle adds to the first rotation angle in order to rotate the ball bearings relative to the race at a reference angle of the pivot bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.