JPS56157506A - Positioning device - Google Patents

Positioning device

Info

Publication number
JPS56157506A
JPS56157506A JP6139080A JP6139080A JPS56157506A JP S56157506 A JPS56157506 A JP S56157506A JP 6139080 A JP6139080 A JP 6139080A JP 6139080 A JP6139080 A JP 6139080A JP S56157506 A JPS56157506 A JP S56157506A
Authority
JP
Japan
Prior art keywords
signal
magnetic head
circuit
near points
current
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
JP6139080A
Other languages
Japanese (ja)
Inventor
Toshio Negoro
Katsuji Kobayashi
Akio Nimata
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 JP6139080A priority Critical patent/JPS56157506A/en
Publication of JPS56157506A publication Critical patent/JPS56157506A/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

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE:To obtain stability of the positioning operation of a magnetic head, by calculating the current position of the magnetic head by the first position signal and the second position signal and by positioning the magnetic head so that the current position becomes equal to the target position. CONSTITUTION:Position signals A and B are compared with each other by a comparing circuit 10 to discriminate whether the current position of the magnetic head is near points P0 and P1 or near points P2 and P3. Similarly, a position signal A and a polarity-inverted signal -B of a position signal B are compared with each other by a comparing circuit 11 to discriminate whether the current position of the magnetic head is near points P0 and P3 or near points P1 and P2. The exclusive OR between this discrimination signal and an output (c) of a comparing circuit 10 is obtained by an exclusive OR circuit 12. Deviations between current positions and target positions of signals (c) and (d) obtained as the result are obtained by a logical operation circuit 13, and a signal proportional to a minute deviation near the garget position P is output from a selecting circuit 16.
JP6139080A 1980-05-09 1980-05-09 Positioning device Pending JPS56157506A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6139080A JPS56157506A (en) 1980-05-09 1980-05-09 Positioning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6139080A JPS56157506A (en) 1980-05-09 1980-05-09 Positioning device

Publications (1)

Publication Number Publication Date
JPS56157506A true JPS56157506A (en) 1981-12-04

Family

ID=13169783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6139080A Pending JPS56157506A (en) 1980-05-09 1980-05-09 Positioning device

Country Status (1)

Country Link
JP (1) JPS56157506A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62121366A (en) * 1985-11-22 1987-06-02 Hitachi Ltd Speed detecting circuit for positioning controller

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50160023A (en) * 1974-06-14 1975-12-25
JPS524209A (en) * 1975-05-15 1977-01-13 Ibm Data memory
JPS5395005A (en) * 1976-12-22 1978-08-19 Ibm Data memory
JPS54155019A (en) * 1978-05-26 1979-12-06 Fujitsu Ltd Servo-system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50160023A (en) * 1974-06-14 1975-12-25
JPS524209A (en) * 1975-05-15 1977-01-13 Ibm Data memory
JPS5395005A (en) * 1976-12-22 1978-08-19 Ibm Data memory
JPS54155019A (en) * 1978-05-26 1979-12-06 Fujitsu Ltd Servo-system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62121366A (en) * 1985-11-22 1987-06-02 Hitachi Ltd Speed detecting circuit for positioning controller

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