JPS5746355A - Speed controller of turntable - Google Patents

Speed controller of turntable

Info

Publication number
JPS5746355A
JPS5746355A JP12315880A JP12315880A JPS5746355A JP S5746355 A JPS5746355 A JP S5746355A JP 12315880 A JP12315880 A JP 12315880A JP 12315880 A JP12315880 A JP 12315880A JP S5746355 A JPS5746355 A JP S5746355A
Authority
JP
Japan
Prior art keywords
rotation
speed
turntable
converted
supplied
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
JP12315880A
Other languages
Japanese (ja)
Inventor
Akira Oinuma
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP12315880A priority Critical patent/JPS5746355A/en
Publication of JPS5746355A publication Critical patent/JPS5746355A/en
Pending legal-status Critical Current

Links

Landscapes

  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE: To realize the rotation of a certain linear speed, by digitally calculating the position of a pickup in the form of an extent of shift from the original point.
CONSTITUTION: A base board 4 of a turntable 2 on which a disk 1 is mounted has a parallel shift in the right and left directions on rails 5 by the rotation of a drive screw 6. As a result, a fixed pickup 10 follows a spiral track. A pulse disk 16 is attached to the shaft of a mobile motor 7, and a pulse signal of a frequency proportional to the speed of rotation is produced by a photointerrupter 17 to be clock- supplied at 19 to an up-down counter 18 of a logical circuit 27. Then the numerical value showing the diameter of a track under reproduction is converted into the numerical value showing the speed of rotation of the table 2 by a coefficient ROM22. This value is then converted at 23 into an analog voltage and supplied to a motor 3 via a differential amplifier 24 to perform the rotation of a certain linear speed.
COPYRIGHT: (C)1982,JPO&Japio
JP12315880A 1980-09-04 1980-09-04 Speed controller of turntable Pending JPS5746355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12315880A JPS5746355A (en) 1980-09-04 1980-09-04 Speed controller of turntable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12315880A JPS5746355A (en) 1980-09-04 1980-09-04 Speed controller of turntable

Publications (1)

Publication Number Publication Date
JPS5746355A true JPS5746355A (en) 1982-03-16

Family

ID=14853610

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12315880A Pending JPS5746355A (en) 1980-09-04 1980-09-04 Speed controller of turntable

Country Status (1)

Country Link
JP (1) JPS5746355A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4613916A (en) * 1983-12-30 1986-09-23 International Business Machines Corporation Information storage disk transducer position control system requiring no servo pattern on the storage disk
US4855978A (en) * 1984-11-28 1989-08-08 Pioneer Electronic Corporation Video/compact disk player having reduced track search time

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4613916A (en) * 1983-12-30 1986-09-23 International Business Machines Corporation Information storage disk transducer position control system requiring no servo pattern on the storage disk
US4855978A (en) * 1984-11-28 1989-08-08 Pioneer Electronic Corporation Video/compact disk player having reduced track search time

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