Patent ID: 8593764
Filing Date: 2013-11-26
Classification: G11B

Abstract:
1. A method to position a head during operation of a disk drive, the head being attached to a flexure of a suspension assembly, the suspension assembly being attached to a voice coil actuator having an actuator coil, the method comprising: driving an electrical current through the actuator coil to move the voice coil actuator towards a coarse position; applying a first voltage across a first piezoelectric element attached to the flexure, the first voltage causing a longitudinal deformation of the first piezoelectric element consisting of expansion relative to a zero-voltage state; applying a second voltage across a second piezoelectric element attached to the flexure, the head being disposed between the first and second piezoelectric elements, the second voltage causing a longitudinal deformation of the second piezoelectric element consisting of expansion relative to a zero-voltage state; wherein the first and second voltages do not switch polarity during normal operation of the first and second piezoelectric elements.