Seagate Technology Incorporated

Gregg Jon Severson

James H McGlennen

Thomas S Rasmussen

Alexei Hiram Sacks

Srinivas Tadepalli

Patrick J Korkowski

Daniel John Brown

Jonathan Pahl Jones

Cory Bert Welscher

Albert Van Der Schans

Steven C Ehret

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

An air current diverting apparatus for a data storage device having a rotating data storage medium in operable relation with an actuator assembly reading data from and writing data to the data storage medium. The air current diverting apparatus has an aerodynamic shroud comprising a base having a first end attachable to the actuator assembly, an upstream surface extending upstream of the actuator assembly, and a downstream surface extending downstream of the actuator assembly and substantially non-parallel to the upstream surface.

Aerodynamic air current diverting apparatus

An airflow control device in a disc drive to remove turbulence from air currents used to aerodynamically support a read/write head adjacent a rotatable disc. The direction of disc rotation is such that a given point on the disc reaches the head prior to reaching an arm used to support the head over a complete revolution of the disc. The airflow control device is placed upstream from the head and forms a channel within which the head moves across the disc. The airflow control device includes a diverter member upstream from the head and a screen member which extends over the head. During operation, air currents impinge upon the diverter member and most of these currents are diverted away from the head. A small portion of the air currents passes through a gap between the diverter member and the disc and flows on to the head to support the head.

Airflow control device for a disc drive

The present invention is directed to a disc heater for use with a spin-stand. The disc heater is adapted to heat a disc that is mounted to a spindle of the spin-stand. The disc heater includes a heater support, a heater, and a controller. The heater support is couplable adjacent the spindle and the disc and is adapted to support the heater near a surface of the disc. The heater produces heat that raises at least a surface of the disc to a temperature that simulates an operating temperature of a disc drive. The controller is electrically coupled to the heater and controls the heat produced by the heater. The spin-stand is adapted to perform various tests on the transducing head. Additional tests, such as accelerated aging studies, can also be performed on the disc.

Spin-stand having a disc heater

Growing community of inventors

Prior Lake, MN, United States of America

Gregg Jon Severson