[go: up one dir, main page]

JPS56145568A - Head positioning system - Google Patents

Head positioning system

Info

Publication number
JPS56145568A
JPS56145568A JP4928180A JP4928180A JPS56145568A JP S56145568 A JPS56145568 A JP S56145568A JP 4928180 A JP4928180 A JP 4928180A JP 4928180 A JP4928180 A JP 4928180A JP S56145568 A JPS56145568 A JP S56145568A
Authority
JP
Japan
Prior art keywords
head
detector
surely
servo
magnetoresistance
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
JP4928180A
Other languages
Japanese (ja)
Inventor
Shigemasa Yoshida
Masayoshi Kamo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4928180A priority Critical patent/JPS56145568A/en
Publication of JPS56145568A publication Critical patent/JPS56145568A/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
    • 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
    • G11B5/596—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 for track following on disks

Landscapes

  • Control Of Position Or Direction (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

PURPOSE:To position the head easily and surely without a complicated detector, by detecting servo information, where the magnetization intensity is changed to a sine wave or a triangular wave for every track in the radius direction, by the magnetoresistance head. CONSTITUTION:Servo information where the magnetization intensity is changed to a sine wave or a triangular wave for every track is recorded on servo face 2 of magnetic disc 1 in the radius direction. This information which is not discrete but continuous is detected easily and surely by magnetoresistance head 4 for servo utilizing the magnetoresistance effect, and driving device 10 is servocontrolled by the head position signal and the speed signal resulting from position detector 9 and speed detector 11, and the head is positioned easily and surely by the constitution where a complicated detector is not required, and thus, the recording density is improved.
JP4928180A 1980-04-15 1980-04-15 Head positioning system Pending JPS56145568A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4928180A JPS56145568A (en) 1980-04-15 1980-04-15 Head positioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4928180A JPS56145568A (en) 1980-04-15 1980-04-15 Head positioning system

Publications (1)

Publication Number Publication Date
JPS56145568A true JPS56145568A (en) 1981-11-12

Family

ID=12826479

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4928180A Pending JPS56145568A (en) 1980-04-15 1980-04-15 Head positioning system

Country Status (1)

Country Link
JP (1) JPS56145568A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07169032A (en) * 1993-09-23 1995-07-04 Internatl Business Mach Corp <Ibm> Apparatus for demodulation of phase-modulated servo signal and phase-modulated servo method
JPH07320248A (en) * 1994-05-23 1995-12-08 Internatl Business Mach Corp <Ibm> Servo method for mr head and hard-disk system
WO2001063600A1 (en) * 2000-02-25 2001-08-30 Mitsubishi Chemical Corporation Magnetic disc, method of forming its magnetized pattern, and magnetic disc apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07169032A (en) * 1993-09-23 1995-07-04 Internatl Business Mach Corp <Ibm> Apparatus for demodulation of phase-modulated servo signal and phase-modulated servo method
US6426844B1 (en) 1993-09-23 2002-07-30 International Business Machines Corporation Method and apparatus for phase modulated servo positioning in a direct access storage device
JPH07320248A (en) * 1994-05-23 1995-12-08 Internatl Business Mach Corp <Ibm> Servo method for mr head and hard-disk system
WO2001063600A1 (en) * 2000-02-25 2001-08-30 Mitsubishi Chemical Corporation Magnetic disc, method of forming its magnetized pattern, and magnetic disc apparatus

Similar Documents

Publication Publication Date Title
DE3378800D1 (en) Continuous-plus-embedded servo data position control system for magnetic disk device
DE3482785D1 (en) METHOD AND DEVICE FOR RECORDING DIGITAL INFORMATION SIGNALS.
DE69032626D1 (en) Magnetic recording and reproducing method, magnetic recording medium, its manufacturing method and magnetic recording apparatus
GB1277177A (en) Magnetically recording and reproducing information
EP0368585A3 (en) Disk-shaped recording medium and apparatus for recording and/or reproducing data thereon
EP0306179A3 (en) Information recording and/or reproducing apparatus provided with means for detecting any abnormality of tracking servo
ES483497A1 (en) Method of positioning reproducing elements and device for carrying out the method
GB1310586A (en) Speed detection and control
ATE20984T1 (en) METHOD OF RECORDING LANE MARKING INFORMATION ON FLEXIBLE MAGNETIC PLATES AND DEVICE FOR FINE POSITIONING OF THE READER HEAD.
JPS56145568A (en) Head positioning system
DE3673180D1 (en) SERVO CIRCUIT FOR USE WITH INFORMATION PLAYBACK DEVICES.
JPS56134365A (en) Recording system for head positioning information
JPS5755548A (en) Magnetic disk device
GB1391478A (en) Dictation-transcription method and system
JPS6464138A (en) Optical tape device
JPS56163561A (en) System and device for positioning of magnetic disk head
JPS56165972A (en) Magnetic sheet recorder and reproducer
JPS6423477A (en) Head positioning control system for magnetic disk device
JPS5534305A (en) Head position detecting system
JPS52100213A (en) Track position detector for magnetic disc apparatus
JPS57167181A (en) Signal read position detecting device
JPS544101A (en) Signal pickupdevice for reproducing system using rotary information recording medium
JPS5755550A (en) Magnetic recorder and reproducer
JPS56153529A (en) Detector for height of head in magnetic recorder and reproducer
JPS6427026A (en) Optical card inclination detector