Patent ID: 6392847
Filing Date: 2002-05-21
Classification: G11B

Abstract:
A disk apparatus comprising:a frame; a disk rotating means for supportably rotating a disk; a head for writing data to and reading data from the rotating disk; a head carriage for radially moving said head relative to the rotating disk with the head carriage having a first side and a second side; a first voice coil motor located in the first side of said head carriage and a second voice coil motor located in the second side of said head carriage for moving said head carriage relative to said frame, said first voice coil motor and said second voice coil motor each comprising: a magnetic circuit structure mounted on said frame; and a drive coil mounted on said head carriage, wherein the drive coil of said first voice coil motor and the drive coil of said second voice coil motor are connected in parallel to an electric power source with the drive coil of the first voice coil motor having a number of turns that is less than the number of turns of the drive coil of the second voice coil motor and being smaller in size relative to the size of the drive coil of the second voice coil motor such that said first voice coil motor and said second voice coil motor generate substantially equal propulsive forces to cause the head carriage to move with precision.