Disk drive detecting head touchdown from microactuator signal
US8144419B1 · kind B1 · utility
137Cited by
11References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 23, 2010 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Apr 23, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/607
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a head actuated over a disk surface by a microactuator, and a fly height actuator operable to adjust a fly height of the head. A servo control voltage is applied to the microactuator, and the fly height actuator is adjusted to decrease a fly height of the head. The servo control voltage is filtered to generate a filtered voltage. A touchdown signal is generated in response to the microactuator and the filtered voltage, wherein the touchdown signal indicates when the head contacts the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.