Patent ID: 7995305

Claim:
An apparatus comprising: a control module that directs a servo controller to seek toward an outer diameter of a machine readable medium from a target servo track to a blank portion of the machine readable medium, and determines a radial velocity of an actuator after accelerating the actuator to a target radial velocity; a comparison module that compares the radial velocity to the target radial velocity; and a calibration module that calibrates a current used to controllably modify the radial velocity of the actuator if the radial velocity is different from the target radial velocity; wherein the control module uses the calibrated current to maintain the actuator at the target radial velocity and determines a variability of the radial velocity of the actuator; the comparison module compares the variability to a target variability; and the calibration module calibrates the target radial velocity if the variability is different from the target variability.