Disk drive having improved head-velocity control, and method therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 25, 2000
Grant Date -
N/A
app pub date -
May 10, 1999
filing date -
May 10, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A disk drive has a servo controller that regulates the velocity of a data-transducing head as the head is moved between a parked position and a data-transducing position within the drive. The head is coupled to a suspension arm. The suspension arm is coupled to an actuator motor that produces an output. This output moves the head between the above-noted positions. The suspension arm engages a head-loading ramp within the drive as the head is moved between its parked and data-transducing positions. This engagement generates a frictional force. The controller attenuates variations in the velocity of the head caused by variations in the frictional force. This is accomplished by varying the motor output based on a predetermined relationship between the head velocity and the frictional force.
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