Active damping of actuator bearing translational mode
US6304409A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 2000 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Jun 30, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B25/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and method for improving operational performance of a disc drive by detecting and compensating for translational vibration modes in a disc drive actuator. The actuator is configured to support a head adjacent a recording disc and pivots about a stationary shaft by way of a cartridge bearing assembly having a pair of ball bearing assemblies. A proximity probe detects translational movement of the actuator assembly relative to the shaft due to, for example, abrupt acceleration and deceleration of the head during a seek operation, or externally applied mechanical shocks. The output of the proximity probe is used to generate a bearing translation signal which is fed into an actuator control servo circuit to modify the amount of current applied to an actuator motor to compensate for the translational vibrations during track following and seek operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.