JPS5983011A - Manufacture of magnetic rotary scale - Google Patents
Manufacture of magnetic rotary scaleInfo
- Publication number
- JPS5983011A JPS5983011A JP19299282A JP19299282A JPS5983011A JP S5983011 A JPS5983011 A JP S5983011A JP 19299282 A JP19299282 A JP 19299282A JP 19299282 A JP19299282 A JP 19299282A JP S5983011 A JPS5983011 A JP S5983011A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- motor
- frequency
- disk
- reference frequency
- 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
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
- G01D5/12—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 using electric or magnetic means
- G01D5/244—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 using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、磁気ロータリーエンコーダ等に１吏用される
磁気回転スケールの作成方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a method for producing a magnetic rotary scale used in magnetic rotary encoders and the like.
産業上の利用分野
従来、ロータリーエンコーダとしては光学的なものが多
く使用されている。光ロータリ−エンコーダは一定間隔
でスリットを設けた円板を回転させ、その円板をはさん
で一方の側に設置された光源と他方の側に設置された受
光素子とによりスリットの移動に応じた出力を取り出し
て角度検出を行なう方式のものが多い。−力磁気的なロ
ータリーエンコーダとしては、円筒の外周上に磁気媒体
を形成し磁気記録により一定間隔の磁化・くターンを形
成し電磁誘導型バルクヘットにより読み出し。Industrial Application Fields Conventionally, many optical rotary encoders have been used. An optical rotary encoder rotates a disk with slits at regular intervals, and uses a light source installed on one side of the disk and a light receiving element installed on the other side to generate signals according to the movement of the slits. There are many methods that extract the output and perform angle detection. -For a force-magnetic rotary encoder, a magnetic medium is formed on the outer periphery of a cylinder, and magnetic recording is performed to form magnetized turns at regular intervals, which are then read out using an electromagnetic induction bulkhead.
角度検出を行なうものや、円板上に磁気媒体を形成し、
フォトリングラフィ等で、部分的に除去することにより
一定間隔の磁化・くター／を形成し、磁気抵抗効果素子
により角度を検出するものなどがある。There are those that detect angles, those that form a magnetic medium on a disk,
There is a method that uses photolithography to partially remove magnetization to form magnetization patterns at regular intervals, and detect the angle using a magnetoresistive element.
光学式のロータリーエンコーダとしては次の三つの問題
点がある。第１に円周」二に一定間隔のスリットを形成
する際、そのスリットの１咄１度、ヒ。There are three problems with optical rotary encoders: First, when forming slits at regular intervals around the circumference, the slits are made once each time.
ノチ精度を高く出すことば容易ではない。第２ｆ−高分
割のロータリーエンコーダを形成する（ｌこｄｌ、）１
杉状的に大きくする必要がある。第３にスリットを形成
後に回転軸に取り付けなければならないため、回転軸と
スリット円との偏心が生じ、この偏心補正をするために
別の検出器がさらに必要となる。Achieving high notch accuracy is not easy. 2nd f- form a high-division rotary encoder (lkodl,)1
It needs to be made larger like a cedar. Thirdly, since the slit must be attached to the rotating shaft after being formed, eccentricity occurs between the rotating shaft and the slit circle, and another detector is required to correct for this eccentricity.
一方、従来の磁気式のロータリーエンコーダでの問題点
としては次のような問題点がある。すなわち磁界検出器
として電磁銹導型バルクヘッドをマルチ化したものを用
いると構造上磁化パターンの最小ピッチは数百μｍのオ
ーダーとなり、ロータリーエンコーダとして分割数を高
くとるには心気的な処理が必要となる。まだ、構造上形
状の大きなものになる。On the other hand, problems with conventional magnetic rotary encoders include the following. In other words, if a multi-layered electromagnetic induction bulkhead is used as a magnetic field detector, the minimum pitch of the magnetization pattern will be on the order of several hundred μm due to its structure, and a high number of divisions as a rotary encoder requires careful processing. It becomes necessary. However, the structure is still large.
一方、磁気抵抗効果素子を磁界検出器として用いている
磁気ロータリーエンコーダでは旨い分割数のものが得ら
れる。しかし、フォトリングラフィによって磁気回転ス
ケールを作成する場合は、先述の光学式ロータリーエン
コーダにおける問題点の１つである偏心による誤差が生
じる。On the other hand, a magnetic rotary encoder using a magnetoresistive element as a magnetic field detector can obtain a good number of divisions. However, when a magnetic rotation scale is created by photolithography, errors occur due to eccentricity, which is one of the problems with the optical rotary encoder described above.
発明の目的
本発明は、磁気ロータリーエンコーダの磁気回転スケー
ルの分割数を任意に選択でき、かつ高分割数を高密度に
することを可能にする磁気回転スケールの作成方法を提
供するものである。OBJECTS OF THE INVENTION The present invention provides a method for creating a magnetic rotary scale in which the number of divisions of the magnetic rotary scale of a magnetic rotary encoder can be arbitrarily selected and the number of divisions can be made high.
発明の構成
本発明は磁気媒体円板を基準周波数で制御して回転させ
、この基準周波数を元にして任意の分割数の磁化パター
ンを記録ヘッドで書き込むことに、より磁気ロータリー
エンコーダの磁気回転スケールを作成するようにしたも
のである。Structure of the Invention The present invention rotates a magnetic medium disk by controlling it at a reference frequency, and writes a magnetization pattern of an arbitrary number of divisions with a recording head based on this reference frequency, thereby improving the magnetic rotation scale of a magnetic rotary encoder. It is designed to create .
実施例の説明
以下本発明の実施例について図面を用いて詳細に説明す
る。DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図は、本発明の磁気回転スケールの作成方法を説明
する概略ブロック図である。FIG. 1 is a schematic block diagram illustrating a method for producing a magnetic rotation scale according to the present invention.
発振器１より取り出した基準周波数ｆ。の信号をもとに
、モーター回転制御系２で一定速度で回転するよう制御
したモーター３に、磁気媒体で形成したまたは表面に磁
気媒体を形成しだ円板４を取シ付け、一定回転数Ｎで回
転させる。一方、基準周波数１０をもとにして任意の周
波数ｆをデバイダ５によって形成し、書き込み回路６を
通し書込みヘッド７により磁気媒体円板４上に磁化パタ
ーンを書き込み、磁気回転スケールとする。記録される
磁化パターンはデバイダ６によって与えられる周波数ｆ
と、回転数Ｎで定まるピンチで破線円状に記録される。Reference frequency f taken out from oscillator 1. Based on the signal, an elliptical disk 4 formed of a magnetic medium or having a magnetic medium formed on the surface is attached to the motor 3, which is controlled to rotate at a constant speed by the motor rotation control system 2, and the motor 3 is controlled to rotate at a constant speed. Rotate with N. On the other hand, an arbitrary frequency f is formed by a divider 5 based on the reference frequency 10, and a magnetization pattern is written on the magnetic medium disk 4 by a write head 7 through a write circuit 6, thereby forming a magnetic rotation scale. The recorded magnetization pattern has a frequency f given by the divider 6
, the pinch determined by the rotational speed N is recorded in a broken line circle.
第２図は本発明を実施するだめの装置を示すブロック図
である。図中第１図の各部に対応する部分には同−信号
を付す。FIG. 2 is a block diagram showing an apparatus for carrying out the present invention. In the figure, the same signals are attached to parts corresponding to the parts in FIG. 1.
水晶発振器１より基準周波数ｆ。の信号をと９出し、基
準周波数ｆ０をもとにモータ３の回転の制御を行なう。Reference frequency f from crystal oscillator 1. The signal 9 is output, and the rotation of the motor 3 is controlled based on the reference frequency f0.
制御系２はモータ３とロータリーエンコーダ１０をＰＬ
Ｌルーズの電圧制御発振器の代わりに用いたもので、位
相比較器１１、パワーアンプ１２、ローパスフィルタ１
３、パルス検出器１４．１／Ｎ１プログラマブルデバイ
ダ１５より構成される。ロータリーエンコーダ１ｏはモ
ータ３で回転させ、その出力をパルス検出器１４で検出
した出力の周波数ｆ１ を基準に、位相比較器１６、
ループフィルタ１７、電圧制御発振器１８．１／１ｑ２
プログラマブルデバイダ１９よりなる通常のＰＬＬルー
プと１／Ｎ３プログラマブルデバイダ２０により任意の
周波数ｆ２の信号を形成し、書込み回路６を通し、書き
込みヘッド７で、モータ３に直結した磁気媒体より形成
された円板４に磁化パターンを記録し、磁気回転スケー
ルを形成する。具体例として、基準ロータリーエンコー
ダ１゜の分割数Ｐ１が１０ｏＯパルス／ｒｅｖとし、形
成する磁気回転スケールの分割数を１２３４パルス／
ｒｅｖとすると、プログラマブルデバイダ１９ 、２０
の１直Ｎ２．Ｎ３をぞれぞれＮ２＝１２３４．Ｎ５＝１
０００とすればよい。Control system 2 connects motor 3 and rotary encoder 10 to PL
This is used in place of the L-loose voltage controlled oscillator, and includes a phase comparator 11, a power amplifier 12, and a low-pass filter 1.
3. Pulse detector 14. Consists of a 1/N1 programmable divider 15. The rotary encoder 1o is rotated by a motor 3, and its output is detected by a pulse detector 14. Based on the output frequency f1, a phase comparator 16,
Loop filter 17, voltage controlled oscillator 18.1/1q2
A signal of an arbitrary frequency f2 is formed by a normal PLL loop consisting of a programmable divider 19 and a 1/N3 programmable divider 20, and then passed through a write circuit 6 and a write head 7 generates a circle formed by a magnetic medium directly connected to the motor 3. A magnetization pattern is recorded on the plate 4 to form a magnetic rotation scale. As a specific example, the number of divisions P1 of the reference rotary encoder 1° is 10oO pulses/rev, and the number of divisions of the magnetic rotation scale to be formed is 1234 pulses/rev.
rev, programmable dividers 19, 20
1 shift N2. Each N3 is N2=1234. N5=1
It may be set to 000.
発明の効果
以上のように、本発明は磁気媒体円板を基準周波数で制
御して定速回転させ、この基準周波数をもとにして任意
の分割数の磁化パターンを記録ヘッドで書き込むように
した磁気回転スケールの作す−エンコーダと作成磁気回
転スケールとが同軸で回転していて、書込み波形は基準
ロータリーエンコーダからの出力波形をＰＬＬループを
通して作成しているため位相のずれがないことにより、
たとえば、回転ムラが生じた場合にも、作成磁気回転ス
ケールにはムラが生じない。まだ、回転させて磁化パタ
ーンを形成するため偏心による誤差が生じない。さらに
、磁気記録により磁化パターンを作成するため、パター
ンのビット間隔が数ミクロン以内にすることができる。Effects of the Invention As described above, in the present invention, a magnetic medium disk is controlled by a reference frequency to rotate at a constant speed, and a magnetization pattern of an arbitrary number of divisions is written by a recording head based on this reference frequency. Created by a magnetic rotary scale - The encoder and the created magnetic rotary scale rotate on the same axis, and the write waveform is created from the output waveform from the reference rotary encoder through a PLL loop, so there is no phase shift.
For example, even if rotational unevenness occurs, there will be no unevenness in the created magnetic rotation scale. However, since the magnetization pattern is formed by rotation, errors due to eccentricity do not occur. Furthermore, since the magnetization pattern is created by magnetic recording, the bit interval of the pattern can be within several microns.
したがって、本発明の方法により、高精度で高分解能の
磁気ロータリーエンコーダを非常にコンパクトな形で実
現することができる。The method of the invention therefore allows a highly accurate and high resolution magnetic rotary encoder to be realized in a very compact form.
第１図は本発明方法を実施するだめの基本的な構成を示
すブロック図、第２図は、本発明方法を実施する装置の
具体的構成を示すブロック図である。
１・・・・・基準周波数発振器、２・・・・・・モータ
回転制御系、３・・−・・・モータ、４・・・・・・磁
気媒体円板、６・・・・・・デバイダ、６・・・・・・
薔込み回路、７・・・・・・書−込みヘッド、１０・・
・・・ロータリーエンコーダ、１１−−位相比較器、１
２・・・パワーアンプ、１３・・・ロバスフィルタ、１
４・・・・・パルス検出器、１６・・１／Ｎ１プログラ
マブルデバイダ、１６・・・・−位相比較器、１７・
−ループフィルタ、１８．・・・電圧制御発振器、１９
・・ １／Ｎ２プログラマブルデノくイダ、２ｏ・・・
・・１／Ｎ３プログラマブルデバイダ。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図FIG. 1 is a block diagram showing the basic configuration of a device for implementing the method of the present invention, and FIG. 2 is a block diagram showing the specific configuration of an apparatus for implementing the method of the present invention. 1... Reference frequency oscillator, 2... Motor rotation control system, 3... Motor, 4... Magnetic medium disk, 6... Divider, 6...
Writing circuit, 7...Writing head, 10...
...Rotary encoder, 11--Phase comparator, 1
2...Power amplifier, 13...Robuss filter, 1
4...Pulse detector, 16...1/N1 programmable divider, 16...-phase comparator, 17...
- loop filter, 18. ...voltage controlled oscillator, 19
... 1/N2 programmable deno kuida, 2o...
...1/N3 programmable divider. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2
Claims (2)
た円板を基準周波数で制御して回転させ、この基準周波
数をもとにした信号で任意の分割数の磁化パターンを前
記円板に磁気記録することを特徴とする磁気回転スケー
ルの作成方法。(1) A disk formed of a magnetic medium or having a magnetic medium formed on its surface is controlled and rotated at a reference frequency, and a magnetization pattern of an arbitrary number of divisions is applied to the disk using a signal based on this reference frequency. A method for creating a magnetic rotation scale characterized by magnetic recording.
コーダを回転させ、その出力をもとに記録信号を作成す
る特許請求の範囲第１項記載の磁気回転スケールの作成
方法。(2) A method for creating a magnetic rotary scale according to claim 1, wherein a reference rotary encoder is rotated by a motor that rotates a disc, and a recording signal is created based on the output thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19299282A JPS5983011A (en) | 1982-11-02 | 1982-11-02 | Manufacture of magnetic rotary scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19299282A JPS5983011A (en) | 1982-11-02 | 1982-11-02 | Manufacture of magnetic rotary scale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5983011A true JPS5983011A (en) | 1984-05-14 |
Family
ID=16300419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19299282A Pending JPS5983011A (en) | 1982-11-02 | 1982-11-02 | Manufacture of magnetic rotary scale |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5983011A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62263409A (en) * | 1986-05-12 | 1987-11-16 | Emupaiya Eapooto Service:Kk | Encoder |
| JPS62276409A (en) * | 1986-05-26 | 1987-12-01 | Emupaiya Eapooto Service:Kk | Rotary encoder |
| JPH03190546A (en) * | 1989-12-18 | 1991-08-20 | Fanuc Ltd | Motor with a built-in position detector and manufacture thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5027378A (en) * | 1973-03-28 | 1975-03-20 | ||
| JPS50129246A (en) * | 1974-04-02 | 1975-10-13 |
-
1982
- 1982-11-02 JP JP19299282A patent/JPS5983011A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5027378A (en) * | 1973-03-28 | 1975-03-20 | ||
| JPS50129246A (en) * | 1974-04-02 | 1975-10-13 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62263409A (en) * | 1986-05-12 | 1987-11-16 | Emupaiya Eapooto Service:Kk | Encoder |
| JPS62276409A (en) * | 1986-05-26 | 1987-12-01 | Emupaiya Eapooto Service:Kk | Rotary encoder |
| JPH03190546A (en) * | 1989-12-18 | 1991-08-20 | Fanuc Ltd | Motor with a built-in position detector and manufacture thereof |
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