JPS5885117A - Optical type rotary encoder - Google Patents
Optical type rotary encoderInfo
- Publication number
- JPS5885117A JPS5885117A JP18347681A JP18347681A JPS5885117A JP S5885117 A JPS5885117 A JP S5885117A JP 18347681 A JP18347681 A JP 18347681A JP 18347681 A JP18347681 A JP 18347681A JP S5885117 A JPS5885117 A JP S5885117A
- Authority
- JP
- Japan
- Prior art keywords
- disk
- fixed disk
- holder
- fixed
- encoder
- 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
- 230000003287 optical effect Effects 0.000 title claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000003754 machining Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
- G01D5/34715—Scale reading or illumination devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、光学式ロータリエンコーダに関するものであ
り、光学式ロータリエンコーダの製造コストを低′滅す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical rotary encoder, and is intended to reduce the manufacturing cost of the optical rotary encoder.
従来の光学式−一タリエンコーダの回転ディスク固定デ
ィスタ、構造を第１図（ａ） ＋ （６） ｔ （ｇ）
にそれぞれ示す。Figure 1 (a) + (6) t (g) shows the structure of a rotary disk fixed disc in a conventional optical single-tary encoder.
are shown respectively.
回転ディスク１．固定ディスク２は、ガラス、プラスチ
ック等の透明基板上に、一定角度ピッチ３で、メッキ、
蒸着等の方法により明暗のパターンが形成されている。Rotating disk 1. The fixed disk 2 is plated or plated at a constant angular pitch 3 on a transparent substrate such as glass or plastic.
A light and dark pattern is formed by a method such as vapor deposition.
回転ディスク１は、回転軸４に、又固定ディスク２はホ
ルダ５の受光素子６（ホトトランジスタ、ホトダイオー
ド等）の前に、さらに、受光素子と対向する位置に発光
素子７（ＬＩＣＤ 、白熱ランプ等）が取り付けられて
いる。The rotating disk 1 is mounted on the rotating shaft 4, and the fixed disk 2 is mounted in front of the light receiving element 6 (phototransistor, photodiode, etc.) of the holder 5, and furthermore, a light emitting element 7 (LICD, incandescent lamp, etc.) is mounted in front of the light receiving element 6 (phototransistor, photodiode, etc.) of the holder 5. ) is attached.
この状態において、回転軸４を回転させることにより、
回転ディスク１と固定ディスク２の明暗のパターンの位
置関係により受光素子６に入る光量が変化し、受光素子
６から略正弦波の出力が得られる。このとき、回転ディ
スク１と固定ディスク２のパターン位置が正確に合致し
ていないと、光量が減少したり、又光が完全にしゃ断さ
れずにモレが生ずるため、受光素子７からの出力が低く
なり、正確な信号が得られない。特に、１回転当りのパ
ルス数が多くなるとパターン巾が細くなるため、回転デ
ィスク１と固定ディスク２の位置合せは微妙な調整が要
求され、出力波形を見ながら人手により１台１台慎重に
調整する必要があり、光学式ロータリエンコーダ製造上
の大きな問題点であり、製造コスト低減のためのネック
となっていた０本発明はかかる欠点を除去するために考
案されたものである。以下実施例に基づいて、本発明の
詳細な説明する。In this state, by rotating the rotating shaft 4,
The amount of light entering the light-receiving element 6 changes depending on the positional relationship between the bright and dark patterns of the rotating disk 1 and the fixed disk 2, and a substantially sinusoidal output is obtained from the light-receiving element 6. At this time, if the pattern positions of the rotating disk 1 and the fixed disk 2 do not match accurately, the amount of light will decrease, or the light will not be completely cut off and leakage will occur, resulting in a low output from the light receiving element 7. Therefore, accurate signals cannot be obtained. In particular, as the number of pulses per revolution increases, the pattern width becomes narrower, so delicate adjustments are required for the alignment of the rotating disk 1 and fixed disk 2, which must be carefully adjusted one by one by hand while checking the output waveform. This is a major problem in the production of optical rotary encoders, and has become a bottleneck for reducing production costs.The present invention has been devised to eliminate this drawback. The present invention will be described in detail below based on Examples.
第２図（α） ＊ （ｉ）において、８は第１図（ｂ）
で示した如き、固定ディスクであり、外周の一部に円弧
部９が形成されている。さらに、ホルダ１０の固定ディ
スク８の取付部１１には固定ディスク８と同じ半径を有
する円弧面が形成されている。さらにホルダ１０のハウ
ジング１２め取付部１４にもノ＼ウジング１２の円筒部
１５と同じ半径の円弧部が形成されている。これらの円
弧部の中心は全て回転軸４の中心と同じである。Figure 2 (α) * In (i), 8 is Figure 1 (b)
It is a fixed disk as shown in , and an arcuate portion 9 is formed on a part of the outer periphery. Further, the mounting portion 11 of the fixed disk 8 of the holder 10 is formed with an arcuate surface having the same radius as the fixed disk 8. Furthermore, an arcuate portion having the same radius as the cylindrical portion 15 of the housing 12 is also formed in the mounting portion 14 of the housing 12 of the holder 10 . The centers of these arcuate portions are all the same as the center of the rotating shaft 4.
このような構成において、固定ディスク８の円弧部９を
ホルダ１０の取付部１１に押しつけ固定ディスク８をホ
ルダ１０に接着固定する。In such a configuration, the circular arc portion 9 of the fixed disk 8 is pressed against the mounting portion 11 of the holder 10 to adhesively fix the fixed disk 8 to the holder 10.
さらに、ホルダ１０の取付部１４をハウジング１２の円
筒部１５に押しつけネジ止めにて固定し、エンコーダを
組立てる。このような構造において分割数５００〜５０
００の各種のエンコーダを作成し試験した結果、固定デ
ィスクと回転ディスクのパターン位置に問題となる程の
ズレは生じず、良好な結果が得られた。Furthermore, the mounting portion 14 of the holder 10 is pressed against the cylindrical portion 15 of the housing 12 and fixed with screws to assemble the encoder. In such a structure, the number of divisions is 500 to 50.
As a result of making and testing various encoders of 00, there was no problem in the pattern position of the fixed disk and the rotating disk, and good results were obtained.
以上の如く本発明によれば、エンコーダの組立てが、回
転ディスクの中心（回転軸の中心）を基準に加工を施こ
された円弧もしくは円筒を使用して行なうことができ、
高精度の位置決めが容易に行なえ回転ディスク、固定デ
ィスクの組立後の調整が不用となる。しかも、円弧２円
筒の加工は、低コストで高精度の加工が容易に得られる
ことから、エンコーダ製造コストを大巾に低減されるこ
とができ工業的な価値は大きい。As described above, according to the present invention, the encoder can be assembled using a circular arc or a cylinder that is machined based on the center of the rotating disk (the center of the rotating shaft),
High-precision positioning can be easily performed, eliminating the need for post-assembly adjustments of the rotating and fixed disks. In addition, since machining of two arcuate cylinders can easily achieve high-precision machining at low cost, the manufacturing cost of the encoder can be greatly reduced, which is of great industrial value.
第１図・・・・・・従来の回転ディスク側面図（α）、
固定ディスク側面図（ｂ）とエンコーダの構造断面図（
ａ）
第２図・・・・・・本発明の固定ディスクの側面図（ａ
）とエンコーダの構造断面図（＆）
以 上
出願人 株式会社諏訪精工舎−
（ご）
第２口 Ｃｂ＞Figure 1: Side view of conventional rotating disk (α),
Fixed disk side view (b) and encoder structural sectional view (
a) Figure 2...Side view of the fixed disk of the present invention (a
) and a structural cross-sectional view of the encoder (&) Applicant: Suwa Seikosha Co., Ltd.
Claims (1)
過部が交互にパターン化された、回転ディスクと［ｔＦ
ディスクを有する、光学式ロータリエンコーダにおいて
、前記固定ディスクの外周の少なくとも一端が回転ディ
スクの回転中心と同じ中心を共有する円弧からなること
を特徴とする光学式ロータリエンフーダ。Between the facing light receiving element and light emitting element, there is a rotating disk [tF
An optical rotary encoder having a disk, wherein at least one end of the outer periphery of the fixed disk is formed of an arc sharing the same center as the rotation center of the rotating disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18347681A JPS5885117A (en) | 1981-11-16 | 1981-11-16 | Optical type rotary encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18347681A JPS5885117A (en) | 1981-11-16 | 1981-11-16 | Optical type rotary encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5885117A true JPS5885117A (en) | 1983-05-21 |
Family
ID=16136460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18347681A Pending JPS5885117A (en) | 1981-11-16 | 1981-11-16 | Optical type rotary encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5885117A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986002441A1 (en) * | 1984-10-19 | 1986-04-24 | Fanuc Ltd | Optical rotary encoder |
-
1981
- 1981-11-16 JP JP18347681A patent/JPS5885117A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986002441A1 (en) * | 1984-10-19 | 1986-04-24 | Fanuc Ltd | Optical rotary encoder |
| JPS6197522A (en) * | 1984-10-19 | 1986-05-16 | Fanuc Ltd | Optical type rotary encoder |
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