Micro-actuator transducer stack inertia cancellation control
US6765743B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2001 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Jun 23, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5552
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A micro-actuator of a head suspension either is wired in a reverse polarity to effect movement of the suspension arms in opposing directions relative to the magnetic disks or reversed in physical orientation and wired identically. This permits a single micro-actuator control signal to control all micro-actuators and thereby cancel the affects of inertia of the suspension arms and the read/write heads on the actuator arms as half of the suspension arms and magnetic heads move in one direction while, simultaneously, the other half of the suspension arms and magnetic heads move in a second, opposite direction in response to a single control signal, simplifying wiring and control electronics. The counter-movement of the suspension arms and magnetic counter the inertia and inertial forces and expedite the settling into their stable recording/reading positions, thereby reducing seek times and improving disk drive performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.