JPS56165958A - Disc driving device - Google Patents

Disc driving device

Info

Publication number
JPS56165958A
JPS56165958A JP7035280A JP7035280A JPS56165958A JP S56165958 A JPS56165958 A JP S56165958A JP 7035280 A JP7035280 A JP 7035280A JP 7035280 A JP7035280 A JP 7035280A JP S56165958 A JPS56165958 A JP S56165958A
Authority
JP
Japan
Prior art keywords
sensor
feedback control
turned
detected
speed feedback
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
JP7035280A
Other languages
Japanese (ja)
Other versions
JPS6156583B2 (en
Inventor
Kanichi Moriyama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7035280A priority Critical patent/JPS56165958A/en
Publication of JPS56165958A publication Critical patent/JPS56165958A/en
Priority to KR2019840013955U priority patent/KR850000441Y1/en
Publication of JPS6156583B2 publication Critical patent/JPS6156583B2/ja
Granted 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
    • 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
    • G11B5/54—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 into or out of its operative position or across tracks
    • 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
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/22—Supporting the heads; Supporting the sockets for plug-in heads while the head is out of operative position

Abstract

PURPOSE:To make the switch to speed feedback control at a correct location, by providing a section to be detected which is detected by a sensor on a car, when the car reaches a switching point to the speed feedback control. CONSTITUTION:When a travelling dolly 1 is in retraction state, a sensor 21 detects a projection 23 and the output is turned on. That is, the state of retraction of the dolly 1 is detected by the sensor 21 and the projection 23. Further, when the dolly 1 starts moving toward a disc 3, the start of movement is detected and when it closes to a switching point to the feedback control, the output of the sensor 21 is turned on and when it reaches the switching point, it is turned off. When the output of the sensor 21 is turned off, a switch 13 is closed and the control is switched to the speed feedback control. Thus, the speed feedback control can be made at a correct position surely without being effected by variance of the moving speed of the car.
JP7035280A 1980-05-27 1980-05-27 Disc driving device Granted JPS56165958A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP7035280A JPS56165958A (en) 1980-05-27 1980-05-27 Disc driving device
KR2019840013955U KR850000441Y1 (en) 1980-05-27 1984-12-24 Disc driving apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7035280A JPS56165958A (en) 1980-05-27 1980-05-27 Disc driving device

Publications (2)

Publication Number Publication Date
JPS56165958A true JPS56165958A (en) 1981-12-19
JPS6156583B2 JPS6156583B2 (en) 1986-12-03

Family

ID=13428943

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7035280A Granted JPS56165958A (en) 1980-05-27 1980-05-27 Disc driving device

Country Status (2)

Country Link
JP (1) JPS56165958A (en)
KR (1) KR850000441Y1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5831786A (en) * 1994-06-02 1998-11-03 International Business Machines Corporation Disk drive having position sensor for ramp load and unload, and method for its use

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63200085A (en) * 1987-02-16 1988-08-18 Mitsubishi Electric Corp Laser doppler speedometer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5831786A (en) * 1994-06-02 1998-11-03 International Business Machines Corporation Disk drive having position sensor for ramp load and unload, and method for its use
US5936788A (en) * 1994-06-02 1999-08-10 International Business Machines Corporation Method and apparatus for ramp load and unload

Also Published As

Publication number Publication date
KR850000441Y1 (en) 1985-03-18
JPS6156583B2 (en) 1986-12-03

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