Sine seek adaptation at voltage and temperature margins
US6515820B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1999 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Sep 3, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59616
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method of compensating for non-optimal operating conditions during a sine seek operation. A disc drive with a seek controller provides a feedforward signal to an actuator during a portion of the operation of an actuator and provides a velocity signal during another portion of operation of the actuator. The controller also stores a velocity error switch point. If it is determined that the feed forward signal is lower or higher than a first nominal value, then the feed forward signal provided by the controller is adjusted. Furthermore, if it was determined that the feed forward signal is lower than the first nominal value, the velocity error switch point is decreased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.