Appeal No. 2001-2088
Application No. 09/121,177
for accurately positioning a magnetic head mounted on a
positioning arm. The positioning arm is located within a disk
drive assembly and has a through hole. An external tracking arm
is moved in a fixed relationship with the positioning arm of the
disk drive assembly. The tracking arm has a detection system
mounted thereon for detecting the edges of the through hole in
the positioning arm, thereby maintaining it in a fixed positional
relationship with the positioning arm inside the disk drive
assembly.
Representative independent claim 1 is reproduced as follows:
1. 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
-2–
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