Method and apparatus for controlling head movement relative to a disk in an embedded servo system
US4590526A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1983 |
| Grant date | May 20, 1986 |
| Priority date | — |
| Expiry date | Nov 1, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5547
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided in an embedded servo system for controllably moving, using a linear motor, a carriage assembly and one or more accompanying heads relative to one or more disk surfaces. Each disk surface includes sectors for reading and writing information. Each disk surface also includes servo fields spaced between the read/write sectors. The servo fields have preset servo or position information for each of the tracks on the disk. The position information is in the form of Normal and Quadrature generated signals used to determine the exact position of the head when it is located between track centers. Using the determined position of the head and knowing a target position on the disk surface, the distance remaining to the target position is found. Using the value of the distance remaining to the target position, a head velocity can be determined and the proper amount of current can be supplied to the linear motor so that the head arrives at the target position in minimal time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.