Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2007-07-24
2009-11-17
Olson, Jason C (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S075000
Reexamination Certificate
active
07619848
ABSTRACT:
A method of searching to find a servo pattern corresponding to a servo pattern copy includes unparking a magnetic head and moving the magnetic head onto an intermediate area of a rotating disk, moving the magnetic head to a servo pattern copy start area by applying an initial search current to a voice coil of a voice coil motor (VCM), periodically measuring the speed of the magnetic head, controlling the speed of the magnetic head by adjusting a search current to the voice coil so that the speed of the magnetic head converges to a pre-set speed, and confirming the servo pattern recorded in the servo pattern copy start area using the magnetic head.
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Choi Ho-joon
Park Cheol-hoon
Olson Jason C
Samsung Electronics Co,. Ltd.
Stanzione & Kim LLP
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