System and method of servo compensation for friction induced off track problem in a data storage device
US6236536A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1999 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Sep 7, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/0035
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Sufficient 1f runout is intentionally generated on tracks on a data storage disk to prevent 2f runout from interfering with the alignment of a read/write head with respect to the tracks. The tip of a disk drive motor spindle is misaligned a predetermined distance with respect to the center of rotation of the disk drive spindle motor, a data storage disk is mounted on the spindle bushing centered on the tip, the data storage disk is spun up to an operational speed, and the read/write head is loaded onto a surface of the data storage disk, thereby generating sufficient 1f runout to prevent 2f runout from interfering with the alignment of the read/write head with respect to the tracks. Alternatively, the spindle bushing can be disposed at a non-perpendicular angle with respect to the axis of rotation of the motor spindle. The 1f runout has a peak amplitude that is at least four times greater than the 2f peak amplitude.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.