Method to compensate for microjog error induced by localized track squeeze
US7271977B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2004 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Apr 13, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of reducing microjog errors in a disk drive having a data recording disk with data tracks and a transducer head positionable on the tracks. The head includes a writer element offset from a reader element. To reduce microjog errors, track squeeze is measured at a number of locations across the surface, wherein the squeeze is due to mis-positioning of the track relative to neighboring tracks. A microjog distance for the destination track is provided, and a microjog correction value based on the measured track squeeze is calculated. The correction value is applied to the microjog distance to obtain a corrected microjog distance that reduces microjog errors due to track squeeze.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.