A disk apparatus includes (a) an actuator having a head supporting arm with a tab formed on the arm and a voice coil fixed to the arm, which arm is rotatable on a horizontal rotary shaft as well as on a vertical rotary shaft, (b) a voice coil motor having an upper yoke with a magnet fixed to the upper...http://www.google.de/patents/US7265929?utm_source=gb-gplus-sharePatent US7265929 - Method of controlling an actuator, and disk apparatus using the same method
