Raymond L Willis

US Patent:

6785072, Aug 31, 2004

Filed:

Mar 30, 2000

Appl. No.:

09/539263

Inventors:

Raymond L. Willis - Edmond OK
Travis D. Fox - Norman OK

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 2736

US Classification:

360 31, 360 55

Abstract:

A disc drive includes a base and a disc rotatably attached to the base. The disc drive also includes an actuator assembly rotatably attached to the base and a device for moving the actuator assembly. The actuator assembly includes an arm carrying a transducer head in a transducing relationship with respect to the disc. The disc drive further includes a servo circuitry and a controller for controlling movement of the actuator assembly during a track follow and a track seek. Piezoelectric transducers are attached to the actuator assembly for non-intrusive measurement of stiction and friction forces developed between the transducer head and the disc during a disc drive spin-up.