The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 26, 2000
Filed:
May. 21, 1996
Lance R Carlson, Longmont, CO (US);
Mark Birtzer, Longmont, CO (US);
Larry Hutsell, Longmont, CO (US);
Maxtor Corporation, Longmont, CO (US);
Abstract
The present invention relates to a disk drive seek control system which is capable of rapidly moving a transducer from an initial position to a target position above a data storage medium. The system applies control to an actuator motor means based on projected transducer velocity at a future servo sample time rather than velocity at a previous servo sample time. This allows the system to significantly reduce transducer velocity errors relative to a desired velocity profile. In addition, the system utilizes dynamically adapted feed forward deceleration current during a deceleration portion of the seek cycle to further reduce velocity errors during this period. By reducing velocity error during the seek cycle, the system significantly reduces the length of time required for settling the transducer on the target track of the disk after the seek cycle has ended.