Shock start for memory disk motor drives

Details Shock start for memory disk motor drives Shock start for memory disk motor drives

Filed on

1989-06-23

Date issued

1991-05-21

Examiner

Tupper, Robert S.

Patent Class

Dynamic magnetic information storage or retrieval

SubClass

Automatic control of a recorder mechanism

Other Related Categories

360 71, 360 75, G11B 540, G11B 1702

Type

Patent

Status

active

Patent number

050180290

Description

ABSTRACT:
A method and apparatus for starting mechanisms such as memory disk and head arrays driven by driving mechanisms such as motors that are initially immobilized by constraints such as stiction in disk drives wherein the system is perturbed by a succession of mechanical shocks while a moderate driving force is applied thereby degrading the strength of the restraint to a value where a moderate driving force can drive the mechanism indicating that the restraint has been overcome then increasing the driving force to a full operating value. In one embodiment, the shock is provided by a loaded spring; in another embodiment, the shock is provided by a solenoid; in another embodiment, the shock is provided by a voice coil.

REFERENCES:
patent: 4530021 (1985-07-01), Cameron
patent: 4542429 (1985-09-01), Nishida et al.
patent: 4833550 (1989-05-01), Takizawa et al.
patent: 4839754 (1989-06-01), Gami et al.
patent: 4897743 (1990-01-01), Kohno
patent: 4907106 (1990-03-01), Yamada

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