JPS5564604A - Floating type turntable unit - Google Patents

Floating type turntable unit

Info

Publication number
JPS5564604A
JPS5564604A JP13824478A JP13824478A JPS5564604A JP S5564604 A JPS5564604 A JP S5564604A JP 13824478 A JP13824478 A JP 13824478A JP 13824478 A JP13824478 A JP 13824478A JP S5564604 A JPS5564604 A JP S5564604A
Authority
JP
Japan
Prior art keywords
turntable
constitution
displacement meter
floating
rotor
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
JP13824478A
Other languages
Japanese (ja)
Inventor
Shigeru Tanaka
Kazutoshi Miura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13824478A priority Critical patent/JPS5564604A/en
Publication of JPS5564604A publication Critical patent/JPS5564604A/en
Pending legal-status Critical Current

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  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE: To stabilize the floating control of a turntable and also to simplify its constitution by arranging a commutatorless motor, floating electromagnet, displacement meter, etc., around a radially-born turntable rotation axis.
CONSTITUTION: To a lower part, rotary disk 10 made in one with body 11 of revolution with rotor 12 is fixed and on an upper part, turntable 8 is mounted. Then, displacement meter 13 is arranged opposing to the lower flank of rotary axis 4 supported rotatably by radial bearing 3, primary and secondary differential compensator circuits are provided, and a gap-length setter is connected to exciting coil 5b of direct-current electromagnet 5 through a connected floating control circuit. Consequently, the gap length between the lower terminal of rotary axis 4 and displacement meter 13 is kept constant and turntable 8 is floated stably. Further, the rotation of turntable 8 is controlled by a commutatorless motor equipped with stator 6 and rotor 12, position detector 14 and a rotation drive control circuit; the need for a thrust bearing, etc., is eliminated to remove noises and its constitution is simplified.
COPYRIGHT: (C)1980,JPO&Japio
JP13824478A 1978-11-09 1978-11-09 Floating type turntable unit Pending JPS5564604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13824478A JPS5564604A (en) 1978-11-09 1978-11-09 Floating type turntable unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13824478A JPS5564604A (en) 1978-11-09 1978-11-09 Floating type turntable unit

Publications (1)

Publication Number Publication Date
JPS5564604A true JPS5564604A (en) 1980-05-15

Family

ID=15217433

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13824478A Pending JPS5564604A (en) 1978-11-09 1978-11-09 Floating type turntable unit

Country Status (1)

Country Link
JP (1) JPS5564604A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6181671B1 (en) * 1997-12-05 2001-01-30 Matsushita Electric Industrial Co., Ltd. Spindle motor and its manufacturing method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4999003A (en) * 1973-01-29 1974-09-19
JPS5010430A (en) * 1973-06-04 1975-02-03

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4999003A (en) * 1973-01-29 1974-09-19
JPS5010430A (en) * 1973-06-04 1975-02-03

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6181671B1 (en) * 1997-12-05 2001-01-30 Matsushita Electric Industrial Co., Ltd. Spindle motor and its manufacturing method

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