Magnetic head-positioning servo system, magnetic head test system and magnetic disk test system
US8154821B2 · kind B2 · utility
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2References
20Claims
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Key dates
| Filing date | Aug 7, 2009 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Nov 19, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head-positioning servo system is provided to accurately test a magnetic disk with a track written in advance, by providing two fine actuators. The second fine actuator, to which a magnetic head is attached, is mounted on the first fine actuator. The second fine actuator has a larger generating displacement than a generating displacement of the first fine actuator, and lets the magnetic disk to follow the eccentricity of the track. In this way, the positioning accuracy can be increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.