Magnetic disk unit for detecting contact between a magnetic head slider and a magnetic disk and method therefor
US6052243A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1997 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Dec 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic disk unit is provided with a storage device for storing a signal output value in each position on a first circumference of a magnetic disk, and a contact detector for relating a signal output value in each position on a second circumference of the magnetic head slider to each position on the first circumference. The latter signal output values are standardized by dividing by the corresponding signal output value stored in the storage device. Contact between the magnetic disk and the magnetic head slider is detected if the standardized output exceeds a preset reference value. The contact detector outputs a signal for instructing an actuator control circuit to move the magnetic head slider to a predetermined home position if contact between the magnetic disk and the magnetic head slider is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.