JPS5737780A - Positioning device of magnetic disk device - Google Patents

Positioning device of magnetic disk device

Info

Publication number
JPS5737780A
JPS5737780A JP11181780A JP11181780A JPS5737780A JP S5737780 A JPS5737780 A JP S5737780A JP 11181780 A JP11181780 A JP 11181780A JP 11181780 A JP11181780 A JP 11181780A JP S5737780 A JPS5737780 A JP S5737780A
Authority
JP
Japan
Prior art keywords
centrifugal force
arm
driving circuit
converter
positioning mechanism
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP11181780A
Other languages
Japanese (ja)
Inventor
Toshiyuki Ueda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11181780A priority Critical patent/JPS5737780A/en
Publication of JPS5737780A publication Critical patent/JPS5737780A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G11B21/02—Driving or moving of heads
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track
    • G11B21/083—Access to indexed tracks or parts of continuous track on discs

Landscapes

  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE:To use a less-flexible shock absorbing spring by suppressing a runaway speed in a fault of a servo device low, by making the operation of a driving circuit ineffective when centrifugal force by the oscillation of a rotary positioning mechanism exceeds a reference value. CONSTITUTION:A rotary positioning mechanism having an arm 7 oscillating on a fixed shaft 8 to move a servo converter 6 and a data converter 5 coupling mutually is providing with a means of detecting centrifugal force in the lengthwise direction of an arm 7. When this centrifugal force exceeds a reference value, the operation of a driving circuit 15 driving an operating device 10 is made ineffective by some means. For example, an acceleration converter 20 equipped near the end of the arm 7 converts the centrifugal force into an electric signal, which is amplified by an amplifier 21 and compared with a reference voltage Es by a comparator 22, whose output is used to actuate a switching circuit 16, thereby disconnecting the driving circuit 15 and operating device 10 from each other.
JP11181780A 1980-08-15 1980-08-15 Positioning device of magnetic disk device Pending JPS5737780A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11181780A JPS5737780A (en) 1980-08-15 1980-08-15 Positioning device of magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11181780A JPS5737780A (en) 1980-08-15 1980-08-15 Positioning device of magnetic disk device

Publications (1)

Publication Number Publication Date
JPS5737780A true JPS5737780A (en) 1982-03-02

Family

ID=14570896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11181780A Pending JPS5737780A (en) 1980-08-15 1980-08-15 Positioning device of magnetic disk device

Country Status (1)

Country Link
JP (1) JPS5737780A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0594522A1 (en) * 1992-10-23 1994-04-27 International Business Machines Corporation Disk drive servo system
US20080251981A1 (en) * 2005-10-05 2008-10-16 Voith Turbo Gmbh & Co. Kg Torsional Vibration Damper

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0594522A1 (en) * 1992-10-23 1994-04-27 International Business Machines Corporation Disk drive servo system
CN1035457C (en) * 1992-10-23 1997-07-16 国际商业机器公司 Disk Drive Servos
US20080251981A1 (en) * 2005-10-05 2008-10-16 Voith Turbo Gmbh & Co. Kg Torsional Vibration Damper

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