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WO1998036408A3 - A magnetic structure urging an actuator assembly toward a home position - Google Patents

A magnetic structure urging an actuator assembly toward a home position Download PDF

Info

Publication number
WO1998036408A3
WO1998036408A3 PCT/US1998/002671 US9802671W WO9836408A3 WO 1998036408 A3 WO1998036408 A3 WO 1998036408A3 US 9802671 W US9802671 W US 9802671W WO 9836408 A3 WO9836408 A3 WO 9836408A3
Authority
WO
WIPO (PCT)
Prior art keywords
actuator assembly
data storage
home position
transducer
torque
Prior art date
Application number
PCT/US1998/002671
Other languages
French (fr)
Other versions
WO1998036408A2 (en
Inventor
A David Michael
Brian P Murphy
William D Robertson
Original Assignee
Quantum Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Quantum Corp filed Critical Quantum Corp
Priority to AU63239/98A priority Critical patent/AU6323998A/en
Publication of WO1998036408A2 publication Critical patent/WO1998036408A2/en
Publication of WO1998036408A3 publication Critical patent/WO1998036408A3/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/22—Supporting the heads; Supporting the sockets for plug-in heads while the head is out of operative position
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
    • G11B11/10567—Mechanically moving the transducers
    • G11B11/10569—Swing arm positioners
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/40—Protective measures on heads, e.g. against excessive temperature 
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with 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
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6011—Control of flying height

Landscapes

  • Moving Of Heads (AREA)

Abstract

A method in a disk drive (300) having a permanent magnet (302), a data storage disk, and an actuator assembly (304) coupled to a transducer (308), for spinning down the data storage disk. The actuator assembly is coupled to an actuator motor (310) which is configured, when on, for positioning with a first torque the actuator assembly (304) such that the transducer (308) is disposed over data storage zones of the data storage disk. The method includes moving, using a ferromagnetic structure coupled to the actuator assembly, the actuator assembly to a home position. The home position represents a position of the transducer assembly in which the transducer is disposed over a designated parking area of the data storage. The ferromagnetic structure is configured to be magnetically attracted toward the permanent magnet with a magnetic force which urges the actuator assembly toward the home position with a second torque lower than the first torque. The method further includes holding, using the second torque, the actuator assembly in the home position when the actuator motor is off. Additionally, the method includes applying dynamic braking, using a spindle motor coupled to the data storage disk, to stop the data storage disk from spinning.
PCT/US1998/002671 1997-02-18 1998-02-13 A magnetic structure urging an actuator assembly toward a home position WO1998036408A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU63239/98A AU6323998A (en) 1997-02-18 1998-02-13 Improved actuator holding mechanism and methods therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US80265497A 1997-02-18 1997-02-18
US08/802,654 1997-02-18

Publications (2)

Publication Number Publication Date
WO1998036408A2 WO1998036408A2 (en) 1998-08-20
WO1998036408A3 true WO1998036408A3 (en) 1998-12-03

Family

ID=25184335

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/002671 WO1998036408A2 (en) 1997-02-18 1998-02-13 A magnetic structure urging an actuator assembly toward a home position

Country Status (2)

Country Link
AU (1) AU6323998A (en)
WO (1) WO1998036408A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4701653A (en) * 1982-07-27 1987-10-20 Papst-Motoren Gmbh & Co Kg Disk drive with internal brake and static discharge
US5541792A (en) * 1992-03-18 1996-07-30 Hitachi, Ltd. Actuator arm with magnetic flux response to bias arm to a stop position
US5566375A (en) * 1993-03-01 1996-10-15 Kabushiki Kaisha Toshiba Magnetic disk drive having voice coil motor for moving a carriage and rocking mechanism for locking the carriage
US5675455A (en) * 1995-03-13 1997-10-07 Fujitsu Limited Rotary actuator for disk drive

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4701653A (en) * 1982-07-27 1987-10-20 Papst-Motoren Gmbh & Co Kg Disk drive with internal brake and static discharge
US5541792A (en) * 1992-03-18 1996-07-30 Hitachi, Ltd. Actuator arm with magnetic flux response to bias arm to a stop position
US5566375A (en) * 1993-03-01 1996-10-15 Kabushiki Kaisha Toshiba Magnetic disk drive having voice coil motor for moving a carriage and rocking mechanism for locking the carriage
US5675455A (en) * 1995-03-13 1997-10-07 Fujitsu Limited Rotary actuator for disk drive

Also Published As

Publication number Publication date
WO1998036408A2 (en) 1998-08-20
AU6323998A (en) 1998-09-08

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