Control method and apparatus for positioning servo system
US4703242A · kind A · utility
4Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1987 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Jan 27, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/41081
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A magnetic disc head positioning system using a stepper motor eliminates positioning errors due to different approach directions and distances to a target track position through a drive control of temporarily stopping the head at a position immediately preceding or following the target track depending on the approach direction and, thereafter, moving the head from this position to the target track with a constant transient response. The head is brought to the temporary stop position by utilizing the overshooting response of the stepper motor so as to minimize the positioning time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.