Patent ID: 6590731
Filing Date: 2003-07-08
Classification: G11B

Abstract:
A head loading apparatus for a disk drive device that reads data from and writes data to a magnetic medium, said head loading apparatus comprising:an actuator movably disposed within said disk drive; a read-write head in mechanical communication with said actuator, said actuator moving said head in response to an electrical signal; a head load ramp, for maintaining said read-write head in a parked position off of said medium; a control circuit in electrical communication with said actuator for moving said heads from said parked position to said medium by applying an adaptive electrical signal; said electrical signal being adaptive based on a measured head load velocity such that said heads move off of said load ramps toward said medium below a predetermined velocity; wherein said adaptive electrical signal further comprises a pulse having an adaptive pulse width adjustable increasingly and decreasingly between at least two pulse widths; and wherein said adaptive pulse width is stored by said disk drive, said stored pulse width being used to load said heads during subsequent head load operations.