Compensation for media dimensional instability using pre-written servopositioning tracks
US6757128B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 2002 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Oct 10, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/584
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method to minimize the contribution of head channel spacing to the negative effects of transverse changes in dimensions of recording media having prerecorded servopositioning tracks. Multiple channels on the recording head are separated into multiple groups of head channels, and each group of heads is independently positioned relative to the pre-written servo tracks. The head comprises an actuator for each pair of head groups. The actuator adjusts the relative spacing between members of the pair in response to position error signals indicating misalignment between the heads and the pre-written servopositioning tracks on the medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.