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1. WO1996005594 - FLEX CIRCUIT VIBRATION SENSOR

Publication Number WO/1996/005594
Publication Date 22.02.1996
International Application No. PCT/US1995/009732
International Filing Date 20.07.1995
IPC
G11B 5/48 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48Disposition or mounting of heads relative to record carriers
CPC
G11B 5/4846
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48Disposition or mounting of heads ; or head supports; relative to record carriers
4806specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
4846Constructional details of the electrical connection between arm and support
G11B 5/5582
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48Disposition or mounting of heads ; or head supports; relative to record carriers
54with provision for moving the head into or out of its operative position or across tracks
55Track change, selection or acquisition by displacement of the head
5521across disk tracks
5582system adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused by a shock
G11B 5/59694
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48Disposition or mounting of heads ; or head supports; relative to record carriers
58with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
596for track following on disks
59694System adaptation for working during or after external perturbation, e.g. in the presence of a mechanical oscillation caused by a shock
Applicants
  • QUANTUM CORPORATION [US/US]; 500 McCarthy Boulevard Milpitas, CA 95035, US
Inventors
  • HATCH, Michael, R.; US
  • CASTAGNA, Joseph, T.; US
  • HAN, Chee, Kwong; US
Agents
  • HARRISON, David, B.; Quantum Corporation 500 McCarthy Boulevard Milpitas, CA 95035, US
Priority Data
08/291,98617.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FLEX CIRCUIT VIBRATION SENSOR
(FR) CAPTEUR DE VIBRATION POUR CIRCUIT SOUPLE
Abstract
(EN)
A method and apparatus for sensing vibration in a flex circuit (106) located between a rotary actuator (100) and electronics within a disk drive. Specifically, the apparatus contains a strain gauge (302/408) attached to or embedded within the flex circuit (300/400). The resistivity of the strain gauge varies in response to vibrations on the cable. This resistance variation can be transformed into electrical signals that are used by a servo system to move the actuator assembly in compensatory motion that effectively cancels any off-track motion cuased by the vibrations.
(FR)
Procédé et appareil permettant de détecter les vibrations dans un circuit souple (106) placé entre un actionneur rotatif (100) et l'électronique d'un lecteur de disques. Plus spécifiquement, l'appareil contient un capteur de contrainte (302/408) attaché au circuit souple (300/400) ou intégré dans ce dernier. La résistivité du capteur de contrainte varie en réponse aux vibrations s'exerçant sur le câble. Cette variation de la résistance peut être transformée en signaux électriques qu'un système asservi utilise pour déplacer l'ensemble actionneur avec un mouvement compensatoire qui annule efficacement tout mouvement de décalage provoqué par les vibrations.
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