Method of position control of recording/reproduction head of disc arrangement

摘要

The method involves separate measurement of the rotation frequency components of the recording disc and a higher order frequency component with frequencies above the rotation frequency components and controlling the positioning devices so as to follow the rotation frequency components whilst the higher order frequency components are eliminated The disc arrangement contains a recording disc which carries servo information and is rotatable about an axis, a recording/reproduction head for reading information from the disc, positioning devices for positioning the head radially above the disc and control devices for controlling the positioning devices according to the servo information. An Independent claim is included for a disc arrangement.