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:
May. 11, 2004
Filed:
Mar. 29, 2002
Raffi Codilian, Irvine, CA (US);
Charles W. Frank, Jr., Irvine, CA (US);
Western Digital Technologies, Inc., Lake Forest, CA (US);
Abstract
A method is disclosed for seeking from first radial position on a spiral track of a magnetic disk drive to a second radial position. The disk having the spiral track rotates at a constant angular velocity. The servo sectors on the spiral track may not be aligned along a radius. A head transit time is determined for moving the head to the second radial position. A first control current pulse is applied to an actuator to move the head toward the second radial position. A timer is commenced for measuring the expiration of the head transit time after applying the first control current pulse. After expiration of the head transit time, a second control current pulse is applied to the actuator to terminate the head movement. At least one servo sector along the spiral track is then read to locate the position of the head.