Actuator torque non-linearity compensation for hard disk drives

Details Actuator torque non-linearity compensation for hard disk drives Actuator torque non-linearity compensation for hard disk drives

1995-12-18

1997-04-01

Chilcot, Richard

Measuring and testing

Dynamometers

Responsive to force

360 7806, G11B 500

Patent

active

056168691

ABSTRACT:
The present invention involves compensating for the irregularity in the torque constant of an electric motor used to move an actuator arm carrying a magnetic read/write head in a disk drive. The torque constant of an electric motor varies across the operating range on a given drive as a function of head location. The present invention provides an apparatus and method for determining the torque constant versus position function of a given disk drive during the servo write process.

REFERENCES:
patent: 4688118 (1987-08-01), Knowles et al.
patent: 4786990 (1988-11-01), Overton et al.
patent: 4937803 (1990-06-01), Nakane
patent: 5119250 (1992-06-01), Green et al.
patent: 5132855 (1992-07-01), Waugh et al.
patent: 5233486 (1993-08-01), Albert
patent: 5305160 (1994-04-01), Funches et al.

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