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:
Nov. 29, 2016
Filed:
May. 26, 2016
Repeated runout (rro) compensation for alternating tracks in an interlaced magnetic recording system
Seagate Technology Llc, Cupertino, CA (US);
Wenzhong Zhu, Apple Valley, MN (US);
Peter S. Harllee, Boulder, CO (US);
Ralph William Cross, Lyons, CO (US);
Kenneth A. Haapala, Plymouth, MN (US);
Edward Charles Gage, Lakeville, MN (US);
Seagate Technology LLC, Cupertino, CA (US);
Abstract
Method and apparatus for controlling the position of a control object in a closed loop control system, such as a servo control system used in a data storage device. In some embodiments, spaced apart first and second data tracks are written to a rotatable data recording medium without using repeated runout (RRO) compensation values to correct for RRO error in servo data written to the medium. A third data track is subsequently written so as to be interspersed between and partially overlap the first and second data tracks. The third data track is written using a set of RRO compensation values to correct for the RRO error in the servo data.