Magnetic disk storage apparatus and method for controlling...

Details Magnetic disk storage apparatus and method for controlling... Magnetic disk storage apparatus and method for controlling...

2005-08-30

2005-08-30

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S070000, C360S075000

Reexamination Certificate

active

06937429

ABSTRACT:
In a magnetic disk storage apparatus, when power supply is stopped, a magnetic head can be retracted safely and quickly so as not to be damaged. There are provided a back electromotive a force detector that detects back electromotive forces developed in coils of a voice coil motor for moving a magnetic head when power a supply is stopped, and a brake controller that judges a movement speed of the magnetic head from the detected back electromotive forces, and brakes the voice coil motor when the movement speed is greater than a preset first limited speed.

REFERENCES:
patent: 5495156 (1996-02-01), Wilson et al.
patent: 5969899 (1999-10-01), Utenick et al.
patent: 6560057 (2003-05-01), Klaassen et al.
patent: 6721119 (2004-04-01), Hassan et al.
patent: 8-63920 (1994-08-01), None
patent: 11-317032 (1998-11-01), None

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