Patent ID: 6025975
Filing Date: 2000-02-15
Classification: G11B

Abstract:
A system for positioning a transducing head of a disc drive over a selected track of a rotatable disc having a plurality of concentric tracks, the system comprising:an actuator assembly having:an E-block body including a cavity, the E-block body being movable about an axis;at least one actuator arm extending from the E-block body;a head suspension mechanism including the transducing head connected to an end of the actuator arm; anda pivot cartridge in the cavity in the E-block body, the E-block body being attached to the pivot cartridge and forming a hinge point between the E-block body and the pivot cartridge;a low resolution motor operatively coupled to the actuator assembly to rotate the actuator assembly about the axis to effect coarse positioning of the head with respect to the selected track of the rotatable disc; anda piezoelectric element in the E-block body controllable to selectively expand and contract based on a voltage across the piezoelectric element, thereby distorting the E-block body around the hinge point to effect fine positioning of the head with respect to the selected track of the rotatable disc.