Patent ID: 6430120
Filing Date: 2002-08-06
Classification: G11B

Abstract:
A system within a disc player for moving a pickup used to transfer information between the pickup and a data track formed on a disc, comprising:a carriage configured for supporting the pickup thereon: a coarse movement apparatus for moving said carriage relative to the data track in a track access direction; a fine movement apparatus associated with said carriage and operable to move the pickup relative to said carriage to positions in said track access direction, said fine movement apparatus including; a magnetic coil mounted on said carriage; a fine actuator controller having means for applying a variable voltage to said magnetic coil, whereby when voltage is applied to said coil a magnetic circuit is created that translates the pickup as a function of the magnitude of said voltage; and a spring connected between said carriage and the pickup that moves the pickup to a neutral position relative to said carriage when no voltage is applied to said magnetic coil; and a resume apparatus for restoring the pickup to a resume position of the pickup relative to said carriage following the occurrence of an event, including; means for storing a value indicative of said resume position at the occurrence of the event; and control means operable after the event for using said stored value to direct said fine movement apparatus to move the pickup relative to said carriage to said resume position.