Magnetic disk drive for compensating repeatable runout error
US6898047B2 · kind B2 · utility
11Cited by
9References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2001 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Jan 2, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to achieve narrow track pitch by measuring, storing and compensating common average values for repeatable runout components between adjacent tracks in a head positioning control system for a magnetic disk drive, a compensation signal is calculated for the average value of the repeatable runout of each servo sector of at least two tracks of servo information reproduced from a magnetic disk, on the basis of an inverse function of the sensitivity characteristics of the tracking control system. The compensation signal is stored, and thereafter used for compensating the servo signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.