JPS5637865A - Magnetic disk driver - Google Patents

Magnetic disk driver

Info

Publication number
JPS5637865A
JPS5637865A JP10970779A JP10970779A JPS5637865A JP S5637865 A JPS5637865 A JP S5637865A JP 10970779 A JP10970779 A JP 10970779A JP 10970779 A JP10970779 A JP 10970779A JP S5637865 A JPS5637865 A JP S5637865A
Authority
JP
Japan
Prior art keywords
control circuit
magnetic
constitution
clock signal
magnetic disk
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.)
Granted
Application number
JP10970779A
Other languages
Japanese (ja)
Other versions
JPS6028068B2 (en
Inventor
Yasunaga Mitsuya
Shuichi Takanami
Shigeru Sakurai
Masao Kito
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.)
Yaskawa Electric Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Yaskawa Electric Manufacturing 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 Nippon Telegraph and Telephone Corp, Yaskawa Electric Manufacturing Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP54109707A priority Critical patent/JPS6028068B2/en
Publication of JPS5637865A publication Critical patent/JPS5637865A/en
Publication of JPS6028068B2 publication Critical patent/JPS6028068B2/en
Expired legal-status Critical Current

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
    • G11B19/28—Speed controlling, regulating, or indicating

Landscapes

  • Rotational Drive Of Disk (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE:To simplify constitution and to make the unit highly reliable by exercising control by a drive control circuit over a DC brushless generator that drives a magnetic disk on the basis of a clock signal taken out of the magnetic disk on which the clock signal synchronizing with a turning state is previously recorded. CONSTITUTION:From magnetic head 5n under magnetic disks 1a-1m, a clock signal is supplied to position control circuit 21. With external control signal SC, control circuit 21 fixes the traveling direction and extent of carriage 8 and then flows electric current that corresponds to them to position magnetic heads 5a-5n on assigned tracks. At the lower end of spindle 2, a DC brushless electric motor is provided and exciting current to its fixed winding 26 is brought under the switching control of drive control circuit 27 through a clock pulse, so that magnetic disks 1a- 1m will turn together with rotor 24. Consequently, the constitution of the unit is simplified and its reliability can be improved.
JP54109707A 1979-08-30 1979-08-30 magnetic disk drive Expired JPS6028068B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54109707A JPS6028068B2 (en) 1979-08-30 1979-08-30 magnetic disk drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54109707A JPS6028068B2 (en) 1979-08-30 1979-08-30 magnetic disk drive

Publications (2)

Publication Number Publication Date
JPS5637865A true JPS5637865A (en) 1981-04-11
JPS6028068B2 JPS6028068B2 (en) 1985-07-02

Family

ID=14517173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54109707A Expired JPS6028068B2 (en) 1979-08-30 1979-08-30 magnetic disk drive

Country Status (1)

Country Link
JP (1) JPS6028068B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5946155A (en) * 1994-06-24 1999-08-31 Fujitsu Limited Disk apparatus using stop patterns to reliably determine a stop position
US6067202A (en) * 1996-12-18 2000-05-23 International Business Machines Corporation Method and apparatus for controlling spindle motor commutation switching times in a disk drive

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49116118U (en) * 1973-01-30 1974-10-03
JPS5023807A (en) * 1973-07-04 1975-03-14

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49116118U (en) * 1973-01-30 1974-10-03
JPS5023807A (en) * 1973-07-04 1975-03-14

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5946155A (en) * 1994-06-24 1999-08-31 Fujitsu Limited Disk apparatus using stop patterns to reliably determine a stop position
US6067202A (en) * 1996-12-18 2000-05-23 International Business Machines Corporation Method and apparatus for controlling spindle motor commutation switching times in a disk drive

Also Published As

Publication number Publication date
JPS6028068B2 (en) 1985-07-02

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