Patent ID: 6587299
Filing Date: 2003-07-01
Classification: G11B

Abstract:
A method for overcoming a stiction condition in a disk drive, said method comprising:providing a plurality of disks each having a pair of disk surfaces, each of the disk surfaces having a corresponding actuator arm assembly including a head; providing a spin motor for rotating said plurality of disks when a stiction condition does not exist; providing a voice coil motor for positioning said heads relative to said disk surfaces when a stiction condition does not exist; providing a microprocessor for controlling application of a voice coil motor current to said voice coil motor and for controlling application of a spin motor current to said spin motor; applying a spin motor current to said spin motor; sensing that the spin motor is not rotating said plurality of disks and, hence, a stiction condition exists; and, applying a plurality of oscillating currents to said voice coil motor in response to said stiction condition, said plurality of oscillating currents each having a single fixed frequency equal to a resonant frequency of the disk drive's lateral bending modes when all of the heads are stuck, but differing amplitudes.