JPH01217760A - Centering device - Google Patents
Centering deviceInfo
- Publication number
- JPH01217760A JPH01217760A JP4063488A JP4063488A JPH01217760A JP H01217760 A JPH01217760 A JP H01217760A JP 4063488 A JP4063488 A JP 4063488A JP 4063488 A JP4063488 A JP 4063488A JP H01217760 A JPH01217760 A JP H01217760A
- Authority
- JP
- Japan
- Prior art keywords
- original glass
- glass disk
- disk
- center
- amt
- 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
Links
- 239000011521 glass Substances 0.000 abstract description 33
- 238000006073 displacement reaction Methods 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 230000005484 gravity Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Rotational Drive Of Disk (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は、例えば光デイスク用ガラス原盤の記録装置に
係り、特に、記録円盤の重心と回転モータの回転軸中心
を一致させるためのセンタリング装置に関する。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a recording device for, for example, a glass master disk for an optical disk, and in particular, the present invention relates to a recording device for a glass master disk for an optical disk, and in particular, to align the center of gravity of a recording disk with the center of the rotation axis of a rotary motor. This invention relates to a centering device.
（従来の技術）
光デイスク用ガラス原盤に対し、レーザー光を用いて信
号を記録又は記録するためのフォーマツティングを行な
うとき、回転モーター上に置かれたガラス原盤の重心と
回転モーターの回転軸中心とのセンタリングが不十分で
あると、ガラス原盤の重心の偏心による遠心力が作用し
記録に有害な回転軸の振れ回りや回転角速度のむらが生
じる。(Prior art) When performing formatting for recording or recording signals on a glass master disc for an optical disc using a laser beam, the center of gravity of the glass master disc placed on a rotary motor and the rotation axis of the rotary motor are If the centering with the center is insufficient, centrifugal force due to the eccentricity of the center of gravity of the glass master will act, causing whirling of the rotating shaft and uneven rotational angular velocity that are harmful to recording.
従来第６図に示すようにガラス原盤２の中心孔を回転モ
ータ３の回転軸４の中央のボスに挿入して、両者の機械
的なはめあいによりセンタリングを行なっていた。Conventionally, as shown in FIG. 6, the center hole of the glass master disk 2 is inserted into the central boss of the rotating shaft 4 of the rotary motor 3, and centering is performed by mechanically fitting the two together.
しかしながら、上記従来のセンタリング方法にあっては
、ガラス原盤２の中心孔の寸法精度が悪く回転モータ３
の回転軸４との間に少なからぬすき間があり、高精にな
センタリングが望めなかった。However, in the conventional centering method described above, the dimensional accuracy of the center hole of the glass master disk 2 is poor, and the rotation motor 3
There was a considerable gap between the rotary shaft 4 and the rotary shaft 4, and high precision centering could not be expected.
（発明が解決しようとする課題）
記録円盤を回転モーターによって回転させながら信号を
記録するとき、記録円盤の重心と回転モーターの回転軸
が一致していないことに起因する回転軸の振れ回りや回
転角速度のむらが生じ、原盤記録精度が悪化するという
問題があった。本発明は上記事情ｌこ鑑みてなされたも
ので記録円盤の振れ回りや回転むらを生じさせないため
に中心孔の寸法公差以上の精度でセンタリングを行なう
ことを目的とする。(Problems to be Solved by the Invention) When recording signals while rotating a recording disk by a rotary motor, whirling or rotation of the rotary axis occurs due to the fact that the center of gravity of the recording disk and the rotation axis of the rotary motor do not match. There was a problem in that angular velocity unevenness occurred and master recording accuracy deteriorated. The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to perform centering with an accuracy higher than the dimensional tolerance of the center hole in order to prevent whirling or uneven rotation of the recording disk.
（課題を解決するための手段）
本発明のセンタリング装置においては、低速で回転する
回転モーター上に置かれたガラス原盤の側面を回転中心
に向って移動する駆動系の先端ｌこ取り付けられた回転
ローラーによって押し、ガラス原盤の偏心量を回転ロー
ラーに近接して取り付けた変位計により計測することに
よりセンタリングを行なうよう構成している。(Means for Solving the Problems) In the centering device of the present invention, a rotating motor attached to the tip of a drive system moves the side surface of a glass master placed on a rotary motor rotating at a low speed toward the center of rotation. The centering is performed by pressing the glass master disk with a roller and measuring the eccentricity of the glass master disk with a displacement meter attached close to the rotating roller.
（作用）
低速で回転する回転モーター上に偏心して置かれたガラ
ス原盤の側面における偏心量を変位計で読み取ると第４
図のようになる。(Function) When the amount of eccentricity on the side of the glass master disc placed eccentrically on a rotary motor rotating at low speed is read with a displacement meter, the fourth
It will look like the figure.
このようなガラス原盤に対し、その側面を先端に回転ロ
ー２−を取り付けた駆動系によって回転中心に向ってゆ
っくりと押し進めると、ガラス原盤が１回転する毎にロ
ーラーがガラス原盤側面に１回接触し、偏心量が減少す
る。When such a glass master is slowly pushed toward the center of rotation by a drive system with a rotating roller 2 attached to the tip of its side surface, the roller contacts the side surface of the glass master once every time the glass master rotates once. and the amount of eccentricity decreases.
この様子を変位計で読み取ると、第５図のようになる。If this situation is read with a displacement meter, it will be as shown in Figure 5.
この変位量が許容値に到達したとき、駆動系を停止させ
ると高精度なセンタリングが終了する。When this amount of displacement reaches an allowable value, the drive system is stopped and highly accurate centering is completed.
（実施例） 以下、図面を参照して本発明の詳細な説明する。(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図は、本発明の概略構成を示す斜視図であり、回転
モータ３に回転自在に支持されたターンテーブル７の上
にガラス原盤２が載置されている。FIG. 1 is a perspective view showing a schematic configuration of the present invention, in which a glass master 2 is placed on a turntable 7 rotatably supported by a rotary motor 3. As shown in FIG.
このガラス原盤２の表面ｌこは、レーザ光を用いて信号
が記録又は記録するためのフォーマツティングが行なわ
れる。The surface of the glass master disk 2 is formatted for recording signals using a laser beam.
このガラス原盤２の周囲には、ガラス原盤２の周囲には
接触する変位計５と、回転ローラ６を先端に取付けた駆
動手段９が配置されている。この駆動手段９は、ボール
ねじ７と送りモータ８により構成されている。A displacement meter 5 that comes into contact with the glass master disk 2 and a driving means 9 having a rotating roller 6 attached to its tip are arranged around the glass master disk 2 . This driving means 9 is composed of a ball screw 7 and a feed motor 8.
次Ｉこ本発明による作用を説明する。第２図に示すよう
に偏心したガラス原盤２に変位計５が接触している。こ
の変位計５の変位量の出力は第４図に示される。第３図
に示すように、モータ８によりボールねじ７を送り、回
転ローラ６をガラス原盤２の中心に向けて低速で移動さ
せる。ガラス原盤２と回転ローラ６が接触すると、接触
点における法線方向にガラス原盤２を押す力ｌＯが発生
する。その結果ガラス原盤２は回転中心に向って押され
、ガラス原盤２が１回転する毎に、駆動手段９の移動量
分だけガラス原盤２の偏心量が減少する。この偏心量の
様子を表わすと第５図のようになり、変位が零になった
ときに高精度なセンタリングが完了する。Next, the effects of the present invention will be explained. As shown in FIG. 2, a displacement meter 5 is in contact with an eccentric glass master disk 2. The displacement amount output of this displacement meter 5 is shown in FIG. As shown in FIG. 3, the motor 8 feeds the ball screw 7 to move the rotary roller 6 toward the center of the glass master 2 at low speed. When the glass master disk 2 and the rotating roller 6 come into contact, a force lO is generated that pushes the glass master disk 2 in the normal direction at the contact point. As a result, the glass master disk 2 is pushed toward the center of rotation, and each time the glass master disk 2 rotates once, the eccentricity of the glass master disk 2 decreases by the amount of movement of the driving means 9. The state of this eccentricity is shown in FIG. 5, and highly accurate centering is completed when the displacement becomes zero.
なお、本発明の制御は第 図１こ示すように変位計５か
らの変位量に基づいて、変位量が零になるまで駆動手段
９を移動させている。As shown in FIG. 1, the control of the present invention moves the driving means 9 based on the displacement amount from the displacement meter 5 until the displacement amount becomes zero.
なお、本発明は、ガラス原盤２のセンタリングにのみ限
定されるものではなく、種々の情報記録円盤のセンタリ
ングに適用できる。さらに、実施例では回転ローラ６を
用いたが摩擦抵抗の少ないものであれば何でもよく、例
えば第６図１こ示すようｌこ非接触に押圧するもの、エ
アーノズル１５から噴出される気体等でもよい。Note that the present invention is not limited to the centering of the glass master disk 2, but can be applied to the centering of various information recording disks. Furthermore, although the rotating roller 6 is used in the embodiment, any roller may be used as long as it has low frictional resistance, such as a roller that presses without contact as shown in FIG. good.
以上詳述したように本発明によれば、円盤の中心孔の寸
法公差には無関係に高精度なセンタリングが行なえるも
のである。As described in detail above, according to the present invention, highly accurate centering can be performed regardless of the dimensional tolerance of the center hole of the disk.
第１図は、本発明のセンタリング装置の一実施例を示す
概略斜視図、第２図と第３図は、本発明の詳細な説明す
るための説明図、第４図と第５図は、本発明による円盤
の偏心量と時間の関係を示す関係図、第６図は、本発明
の変形例を示す平面図、第７図は、従来のセンタリング
装置を示す概略斜視図である。
、２・・・ガラス原盤（円盤ン、３・・・回転モータ（
回転手段）、４・・・回転軸、５・・・変位計（検出手
段）、６・・・回転ローラ、７・・・送りねじ、８・・
・送りモータ、９・・・駆動手段（力付与手段）、１５
・・・エアーノズル（力付与手段）。FIG. 1 is a schematic perspective view showing one embodiment of the centering device of the present invention, FIGS. 2 and 3 are explanatory diagrams for explaining the invention in detail, and FIGS. 4 and 5 are FIG. 6 is a diagram illustrating the relationship between eccentricity of a disk and time according to the present invention, FIG. 6 is a plan view showing a modification of the present invention, and FIG. 7 is a schematic perspective view showing a conventional centering device. , 2...Glass master disk (disc), 3...Rotating motor (
(rotating means), 4... rotating shaft, 5... displacement meter (detecting means), 6... rotating roller, 7... feed screw, 8...
・Feed motor, 9... Drive means (force applying means), 15
...Air nozzle (force applying means).
Claims (1)
の回転手段の回転中心と前記円盤の中心位置のずれ量を
検出する検出手段と、前記ずれ量が零になるように前記
円盤の側面に前記回転中心方向の力を付与する力付与手
段とを具備することを特徴とするセンタリング装置。a disc, a rotating means for placing and rotating the disc, a detecting means for detecting the amount of deviation between the center of rotation of the rotating means and the center position of the disc, and a means for detecting the amount of deviation between the center of rotation of the rotating means and the center position of the disc, A centering device comprising: force applying means for applying a force in the direction of the center of rotation to a side surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4063488A JPH01217760A (en) | 1988-02-25 | 1988-02-25 | Centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4063488A JPH01217760A (en) | 1988-02-25 | 1988-02-25 | Centering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01217760A true JPH01217760A (en) | 1989-08-31 |
Family
ID=12585981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4063488A Pending JPH01217760A (en) | 1988-02-25 | 1988-02-25 | Centering device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01217760A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5583845A (en) * | 1994-02-25 | 1996-12-10 | Sony Corporation | Glass blank disc centering device |
| EP0777225A2 (en) * | 1995-11-28 | 1997-06-04 | Balzers und Leybold Deutschland Holding Aktiengesellschaft | Device for laser beam exposure of a disc-shaped substrate and method of centrally clamping a disc-shaped substrate |
| JP7036299B1 (en) * | 2020-10-21 | 2022-03-15 | 日本精工株式会社 | Centering tool, centering device, machine tool, circular work centering method, circular work manufacturing method, ring member manufacturing method, bearing manufacturing method, machine manufacturing method, vehicle manufacturing method, and program. |
| WO2022085744A1 (en) | 2020-10-21 | 2022-04-28 | 日本精工株式会社 | Centering tool, centering device, machine tool, method of centering circular workpiece, circular workpiece manufacturing method, ring member manufacturing method, bearing manufacturing method, machine manufacturing method, vehicle manufacturing method, and program |
-
1988
- 1988-02-25 JP JP4063488A patent/JPH01217760A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5583845A (en) * | 1994-02-25 | 1996-12-10 | Sony Corporation | Glass blank disc centering device |
| EP0777225A2 (en) * | 1995-11-28 | 1997-06-04 | Balzers und Leybold Deutschland Holding Aktiengesellschaft | Device for laser beam exposure of a disc-shaped substrate and method of centrally clamping a disc-shaped substrate |
| US5777979A (en) * | 1995-11-28 | 1998-07-07 | Balzers Und Leybold Deutschland Holding Ag | Apparatus for laser exposure of a substrate disk and a method for the centered mounting of a substrate disk |
| EP0777225A3 (en) * | 1995-11-28 | 1999-03-24 | Balzers und Leybold Deutschland Holding Aktiengesellschaft | Device for laser beam exposure of a disc-shaped substrate and method of centrally clamping a disc-shaped substrate |
| JP7036299B1 (en) * | 2020-10-21 | 2022-03-15 | 日本精工株式会社 | Centering tool, centering device, machine tool, circular work centering method, circular work manufacturing method, ring member manufacturing method, bearing manufacturing method, machine manufacturing method, vehicle manufacturing method, and program. |
| WO2022085744A1 (en) | 2020-10-21 | 2022-04-28 | 日本精工株式会社 | Centering tool, centering device, machine tool, method of centering circular workpiece, circular workpiece manufacturing method, ring member manufacturing method, bearing manufacturing method, machine manufacturing method, vehicle manufacturing method, and program |
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