Patent ID: 6166876
Filing Date: 2000-12-26
Classification: G11B

Abstract:
In a disc drive having a head adjacent a rotatable disc on which a plurality of tracks are defined, a motor for controllably positioning the head relative to the disc and an observer providing an estimated position and estimated velocity of the head, a method for moving the head from an initial track to a destination track comprising steps of:(a) initiating a seek mode to move the head toward the destination track by applying current to the motor in relation to a current command signal indicative of a trajectory of the head; and(b) generating a modified current command signal as a sum of the current command signal and a settling current correction value determined in relation to the estimated position and the estimated velocity of the head at a predetermined distance from the destination track, where the motor applies current, in response to the modified current command signal, to settle the head onto the destination track.