JPS5525865A - Player - Google Patents

Player

Info

Publication number
JPS5525865A
JPS5525865A JP9882578A JP9882578A JPS5525865A JP S5525865 A JPS5525865 A JP S5525865A JP 9882578 A JP9882578 A JP 9882578A JP 9882578 A JP9882578 A JP 9882578A JP S5525865 A JPS5525865 A JP S5525865A
Authority
JP
Japan
Prior art keywords
speed
record
motor
center hole
eccentricity
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
JP9882578A
Other languages
Japanese (ja)
Inventor
Masao Horie
Satoru Kusaka
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP9882578A priority Critical patent/JPS5525865A/en
Publication of JPS5525865A publication Critical patent/JPS5525865A/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
    • G11B19/28—Speed controlling, regulating, or indicating

Landscapes

  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE:To prevent variation in regenerative frequency due to the eccentricity of the center hole of a record by making constant the circumferential speed of the center hole of a record by making constant the circumferential speed of the record at the trace position of a tone arm by controlling the rotating speed of a turntable on the basis of the horizontal moving speed of the tone arm. CONSTITUTION:Turntable 23 is direct driven by DD motor 24, and its rotating speed is detected by frequency generator 26, whose detection signal (a) is supplied to speed servo circuit 27, where speed control signal S for DD motor 24 is generated. Part of speed detection signal (b), obtained from speed detection coil 6 fitted to the tone arm unit, is supplied to speed servo circuit 27. Then, circuit 27 generates a control signal which conpensates the variation in circumferential speed caused by the eccentricity of the center hole of the record and it is supplied to DD motor 24 being superposed upon the above-mentioned speed control signal S. Therefore the rotating speed of motor 24 is controlled according to speed detection signal (b), so that the circumferential speed of the record 25 at the trace point of the stylus caused by the eccentricity of the center hole of record 25 will be constant.
JP9882578A 1978-08-14 1978-08-14 Player Pending JPS5525865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9882578A JPS5525865A (en) 1978-08-14 1978-08-14 Player

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9882578A JPS5525865A (en) 1978-08-14 1978-08-14 Player

Publications (1)

Publication Number Publication Date
JPS5525865A true JPS5525865A (en) 1980-02-23

Family

ID=14230064

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9882578A Pending JPS5525865A (en) 1978-08-14 1978-08-14 Player

Country Status (1)

Country Link
JP (1) JPS5525865A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59177455U (en) * 1983-05-17 1984-11-27 久保　政延 Fire sprinkler equipment end test device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59177455U (en) * 1983-05-17 1984-11-27 久保　政延 Fire sprinkler equipment end test device

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