Patent ID: 6603629
Filing Date: 2003-08-05
Classification: G11B

Abstract:
A servo track writing apparatus for positioning a read/write head in a disk drive assembly wherein the read/write head is mounted on a positioning arm, the positioning arm has a through hole therein, and the positioning arm is movable by a positioning means over a media, the writing apparatus comprising:a tracking arm located external to the disk drive assembly; moving means for moving said tracking arm in fixed relationship with the positioning arm; position determining means for determining the position of said tracking arm; detection means for detecting the edges of the through hole of the positioning arm relative to the tracking arm; and a control unit suitable to: operate said moving means and said detection means such that said tracking arm and the positioning arm attain a particular geometric relationship; operate said moving means and the positioning means such that said tracking arm and the positioning arm synchronously are maintained in said geometric relationship; operate said position determining means to measure the position of said tracking arm and therefrom infer the positions of the positioning arm and the read/write head inside the disk drive assembly; and direct the disk drive assembly to position and maintain the read/write head as desired for servo track writing in the media.