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:
Feb. 07, 2017
Filed:
May. 12, 2016
Seagate Technology Llc, Cupertino, CA (US);
Amar Nath, Singapore, SG;
Ming Zhong Ding, Singapore, SG;
Guo Quing Zhang, Singapore, SG;
Chan Fan Lau, Johor, MY;
Seagate Technology LLC, Cupertino, CA (US);
Abstract
A method includes performing a first seek operation using a first voice coil motor (VCM) control signal by utilizing a first drag component value. The method further includes determining a position error signal (PES) and a DC offset component of the PES measured during the first seek operation, and determining that the DC offset component is above a predetermined threshold. In response to determining that the DC offset component is above the predetermined threshold, the method further includes determining a second drag component value different than the first drag component value. The method further includes generating a second VCM control signal by applying the second drag component value.