Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2008-03-25
2008-03-25
Nguyen, Hoa T. (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S078060
Reexamination Certificate
active
11544253
ABSTRACT:
A system comprises a positioning module, a frequency measuring module, a simulation module, and a control module. The positioning module positions an actuator arm adjacent to a track to read spirals that are prewritten using current of a predetermined frequency. The frequency measuring module measures a first frequency of sync marks of the spirals when the actuator arm is positioned adjacent to the track. The simulation module calculates a second frequency of the sync marks when the actuator arm moves at a predetermined actuator velocity. The control module calculates an actuator velocity at which the spirals are prewritten based on the first frequency, the second frequency, and the predetermined actuator velocity.
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Rutherford David
Ton-That Luan
Habermehl James L
Marvell World Trade Ltd.
Nguyen Hoa T.
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