Data transducer position control system for rotating disk data storage equipment
US4396959A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1980 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Sep 24, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5556
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved apparatus and method is disclosed for controlling the position of one moveable member relative to another. In the disclosed preferred embodiment of a rotating disk memory system, the moving member is a head carriage structure and the other is a frame carrying a rotating data storage disk. From externally supplied position selectron information, and from internally determined polyphase position information, open loop position changing movements are determined and carried out in accordance with monitored incremental polyphase position information generated during the movement. When a destination location has been reached one or more servo systems close loop in order to maintain the moving member precisely at the newly commanded location. A rotor for moving the member is an aspect of the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.