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:
Dec. 26, 2006
Filed:
Dec. 31, 2001
Pradeep K. Subrahamanyan, Hillsboro, OR (US);
Patrick J. Korkowski, Savage, MN (US);
Waleed A. Farahat, St. Louis Park, MN (US);
Steven C Ehret, Inver Grove Heights, MN (US);
Gregg J. Severson, Prior Lake, MN (US);
Thomas S Rasmussen, Kasson, MN (US);
Albert Van Der Schans, Minnetonka, MN (US);
Alexei H. Sacks, Edina, MN (US);
James H. Mcglennen, Eden Prairie, MN (US);
Pradeep K. Subrahamanyan, Hillsboro, OR (US);
Patrick J. Korkowski, Savage, MN (US);
Waleed A. Farahat, St. Louis Park, MN (US);
Steven C Ehret, Inver Grove Heights, MN (US);
Gregg J. Severson, Prior Lake, MN (US);
Thomas S Rasmussen, Kasson, MN (US);
Albert Van der Schans, Minnetonka, MN (US);
Alexei H. Sacks, Edina, MN (US);
James H. McGlennen, Eden Prairie, MN (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A high bandwidth, large stroke spin-stand for testing components of a disc drive includes a coarse positioning stage and a rotary micropositioning stage. The spin-stand is capable of positioning a transducer head relative to the data storage disc based on one or both of: (1) an angular position of a rotary actuator arm in the rotary micropositioning stage; and (2) servo data read from the data storage disc. The angular position of the rotary actuator arm is detected by an encoder. In one embodiment, position adjustments are based on the detected angular position. In another embodiment, position adjustments are based on servo data read from the data storage disc, but are also conditional on angular position being consistent with the servo data. In yet another embodiment, both angular position and servo data from a track are linearized to generate PES adjustment parameters that are recorded on the data storage disc to redefine the track as more circular or to linearize the PES.