Seagate Technology Incorporated

Steven C Ehret

Alexei Hiram Sacks

James H McGlennen

Patrick J Korkowski

Gregg Jon Severson

Thomas S Rasmussen

Albert Van Der Schans

Pradeep K Subrahamanyan

Waleed A Farahat

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.

High bandwidth large stroke spin-stand

Growing community of inventors

Inver Grove Heights, MN, United States of America

Steven C Ehret