JPS57164473A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPS57164473A
JPS57164473A JP4797881A JP4797881A JPS57164473A JP S57164473 A JPS57164473 A JP S57164473A JP 4797881 A JP4797881 A JP 4797881A JP 4797881 A JP4797881 A JP 4797881A JP S57164473 A JPS57164473 A JP S57164473A
Authority
JP
Japan
Prior art keywords
motor
disk
driving
power source
prescribed value
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
JP4797881A
Other languages
Japanese (ja)
Inventor
Takeo Masuda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP4797881A priority Critical patent/JPS57164473A/en
Publication of JPS57164473A publication Critical patent/JPS57164473A/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
    • 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

Abstract

PURPOSE:To reduce a load on a power source by rotating a DC motor for disk driving, and then driving a stepping motor for head positioning after the rotational frequency of the DC motor increases above a prescribed value. CONSTITUTION:The rotational frequency of a DC motor for disk driving is detected by detecting a clock signal written on a disk by a clock head 1 and inputted to a synchronizing circuit 4 through a pulse generating circuit 3. Its output is supplied to a monostable circuit 5, which outputs a ''1'' successively to the reset terminal of a counter 6 when the frequency of a pulse signal increases above a prescribed value, and consequently a switching element 9 is turned on to energize the energizing winding 10 of a stepping motor as a head positioning mechanism. Therefore, both the motors are never actuated at the same time, and a maximum current from a power source is suppressed.
JP4797881A 1981-03-31 1981-03-31 Magnetic disk device Pending JPS57164473A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4797881A JPS57164473A (en) 1981-03-31 1981-03-31 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4797881A JPS57164473A (en) 1981-03-31 1981-03-31 Magnetic disk device

Publications (1)

Publication Number Publication Date
JPS57164473A true JPS57164473A (en) 1982-10-09

Family

ID=12790396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4797881A Pending JPS57164473A (en) 1981-03-31 1981-03-31 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPS57164473A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60164959A (en) * 1984-02-08 1985-08-28 Teac Co Magnetic disk device
JPS60192155U (en) * 1984-05-30 1985-12-20 株式会社東芝 floppy disk device
JPS6148180A (en) * 1984-08-11 1986-03-08 Fuji Photo Film Co Ltd Rotating magnetic recording device
JPS6218865U (en) * 1985-07-19 1987-02-04
US4700243A (en) * 1983-07-29 1987-10-13 Teac Corporation Power saving circuit arrangement for an apparatus for data transfer with flexible magnetic disk or the like
US4736263A (en) * 1984-09-29 1988-04-05 Hitachi, Ltd. Method and apparatus for driving a disk
JPS63209067A (en) * 1987-02-24 1988-08-30 Funai Denki Kk Disk reproducing device
US4782406A (en) * 1984-02-10 1988-11-01 Teac Corporation Data transfer apparatus with a disklike record medium and a method of operation therefore
US4783706A (en) * 1984-02-10 1988-11-08 Teac Corporation Circuit arrangement and method for saving power in magnetic disk apparatus without head displacement

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5737776A (en) * 1980-08-16 1982-03-02 Pioneer Electronic Corp Control system of record player

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5737776A (en) * 1980-08-16 1982-03-02 Pioneer Electronic Corp Control system of record player

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4700243A (en) * 1983-07-29 1987-10-13 Teac Corporation Power saving circuit arrangement for an apparatus for data transfer with flexible magnetic disk or the like
US4691255A (en) * 1984-02-08 1987-09-01 Teac Corporation Power saving circuit arrangement for data transfer apparatus with a disklike record medium
JPS60164959A (en) * 1984-02-08 1985-08-28 Teac Co Magnetic disk device
JPH0322665B2 (en) * 1984-02-08 1991-03-27 Teac Corp
US4783706A (en) * 1984-02-10 1988-11-08 Teac Corporation Circuit arrangement and method for saving power in magnetic disk apparatus without head displacement
US4782406A (en) * 1984-02-10 1988-11-01 Teac Corporation Data transfer apparatus with a disklike record medium and a method of operation therefore
JPS60192155U (en) * 1984-05-30 1985-12-20 株式会社東芝 floppy disk device
JPS6148180A (en) * 1984-08-11 1986-03-08 Fuji Photo Film Co Ltd Rotating magnetic recording device
JPH0517635B2 (en) * 1984-08-11 1993-03-09 Fuji Photo Film Co Ltd
US4774595A (en) * 1984-08-11 1988-09-27 Fuji Photo Film Co., Ltd. Recording and reproducing apparatus with magnetic head protruded onto sheet of magnetic recording medium
US4736263A (en) * 1984-09-29 1988-04-05 Hitachi, Ltd. Method and apparatus for driving a disk
JPS6218865U (en) * 1985-07-19 1987-02-04
JPS63209067A (en) * 1987-02-24 1988-08-30 Funai Denki Kk Disk reproducing device
JPH0432466B2 (en) * 1987-02-24 1992-05-29

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