Patent ID: 6975123

Claim:
A method for calibrating a driver in a dual actuator disk drive, comprising: determining a measured capacitance associated with at least one piezoelectric element prior to positioning the piezoelectric element over a disk surface including the steps of: driving said at least one piezoelectric element to a predetermined starting voltage: supplying a predetermined current to said at least one piezoelectric element for a predetermined time period; measuring a second voltage associated with said at least one piezoelectric element after said supplying step; and calculating said measured capacitance based on said measuring step, wherein said calculating step is performed based on the following equation: C=I* ( T /( V m2 −V m1 ) where C is the measured capacitance, I is the current supplied to said at least one piezoelectric element during said supplying step, T is the predetermined time period; V m2 is the second voltage, and V m1 is the starting voltage; and adjusting said driver based on said determining step.