Virtual tracks for repeatable runout compensation
US6952320B1 · kind B1 · utility
20Cited by
147References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2000 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Sep 12, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to repeatable runout (RRO) compensation of servo control systems that can be used in disc drives or spin-stands. The RRO relates to eccentricity between servo tracks, which were written onto a disc prior to the installation of the disc into the disc drive or spin-stand, and an axis of rotation of the disc. The present invention compensates the servo control loop by canceling the RRO and controlling a head to follow virtual tracks which are eccentric to the data tracks defined by the servo tracks and concentric with the axis of rotation of the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.