Method and device for retracting an actuator

Details Method and device for retracting an actuator Method and device for retracting an actuator

2005-02-22

2005-02-22

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

06859340

ABSTRACT:
An actuator retract system and method for moving read/write heads from data regions on discs to non-data locations in a disc drive is disclosed. The non-data locations may be on or in close proximity to the discs. The non-data locations may be a landing zone or a load/unload ramp. At disc drive power-down, power generated from the rotational inertia in rotating discs is used to supply a current to a coil of a voice coil motor operably coupled to the actuator. During such power-down operation, a desired velocity is maintained using acceleration or deceleration, when necessary. The current generates an electric field around the coil that interacts with a magnetic field in the voice coil motor to move the actuator such that the read/write heads are retracted to the non-data location.

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Article, IBM magnetic hard disk drive load/unload technology.

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