Patent ID: 6504670
Filing Date: 2003-01-07
Classification: G11B

Abstract:
A method for use in suppressing oscillations during a seek mode in a disk drive, said method comprising the steps of:providing a disk drive including a data storage disk having a plurality of substantially concentric tracks and a plurality of servo sectors within each track, a spin motor for rotating said data storage disk about an axis, a transducer for use in transferring data between a track of said data storage disk and an exterior environment, and an actuator assembly coupled to said transducer for use in moving the transducer with respect to the data storage disk, said actuator assembly including an actuator arm that is coupled at one end to said transducer and at another end to a motor unit for controllably moving said actuator arm in response to a control signal applied to said motor unit, wherein said actuator assembly includes a resonance which causes said actuator assembly to oscillate at a predetermined resonance frequency when said resonance is excited; receiving a seek command to move said transducer from a present position to a destination position proximate to a target track of said data storage disk to enable a data transfer between said transducer and said target track; and generating a control signal for delivery to said motor unit, in response to receipt of said seek command, based upon said predetermined resonance frequency of said resonance, wherein said step of generating includes generating a first impulse and generating a second impulse, said second impulse being generated a predetermined length of time after said first impulse, wherein said predetermined length of time is inversely proportional to an estimate of said predetermined resonance frequency.