Method for actively controlling the gram load on a disk drive suspension assembly
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United States of America Patent
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Aug 1, 2006
Issued Date -
N/A
app pub date -
Nov 26, 2002
filing date -
Jun 29, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for actively controlling the gram load on a disk drive suspension assembly and to a disk drive using the present disk drive suspension assembly. The gram load can be actively changed by changing the applied voltage to one or more multi-layer piezoelectric actuators attached to the head suspension. The active gram control system allows the gram load to be changed on a non-permanent basis and to control the gram load to a much finer scale than can be accomplished using conventional techniques. By attaching the first and second ends of the piezoelectric actuator to discrete locations on the load beam, while the portion of the piezoelectric actuator between the first and second ends remains unattached to the load beam, a force non-parallel to the load beam can be applied to the head suspension.
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