Position control device, disk device, and position control...

Details Position control device, disk device, and position control... Position control device, disk device, and position control...

2006-06-27

2008-10-07

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S075000

Reexamination Certificate

active

07433147

ABSTRACT:
The present invention provides a disk device, a control device, and a positioning control method with which positioning in a target position can be performed without expending time on a seek operation even when virtual circular control is performed using an eccentric disk. Virtual circular orbits, each depicting a perfect circle centered on the rotary center of a disk surface, are determined. An average orbit is then determined by averaging the virtual circular orbits. Orbits obtained by subtracting the average orbit from each virtual circular orbit are set as the position orbits of the respective disk surfaces. An MCU controls an actuator to follow these orbits.

REFERENCES:
patent: 6496322 (2002-12-01), Hasegawa et al.
patent: 2001/0021077 (2001-09-01), Takaishi
patent: 2004/0004783 (2004-01-01), Takaishi et al.
patent: 2004-39116 (2004-02-01), None
patent: 3683155 (2005-06-01), None

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