Patent ID: 6906897

Claim:
A disk drive comprising: a disk drive base; an actuator rotatably coupled to the disk drive base and defining an actuator longitudinal axis orthogonal to the axis of rotation, the actuator including an actuator body configured to pivot about an axis of rotation and a coil support extending from the actuator body; a magnetic element coupled to the disk drive base, the magnetic element including first and second magnets extending radially with respect to the axis of rotation; a main coil attached to the coil support, the main coil including first and second radial segments, the first radial segment overlapping the first magnet throughout a full range of motion of the actuator, the second radial segment overlapping the second magnet throughout the full range of motion of the actuator; and a secondary coil attached to the coil support, the secondary coil being separately energized from the main coil, the secondary coil being configured to produce magnetic forces upon the actuator substantially parallel to the actuator longitudinal axis, the secondary coil including a lateral segment disposed perpendicular to the actuator longitudinal axis and overlapping the first and second magnets throughout the full range of motion of the actuator.