JPS6351121A - Positional detector of injection molder - Google Patents

Positional detector of injection molder

Info

Publication number
JPS6351121A
JPS6351121A JP19278486A JP19278486A JPS6351121A JP S6351121 A JPS6351121 A JP S6351121A JP 19278486 A JP19278486 A JP 19278486A JP 19278486 A JP19278486 A JP 19278486A JP S6351121 A JPS6351121 A JP S6351121A
Authority
JP
Japan
Prior art keywords
power
detection circuit
power source
positional detection
line
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
JP19278486A
Other languages
Japanese (ja)
Inventor
Kohei Hasegawa
長谷川 公平
Tetsuya Okamura
哲也 岡村
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.)
Sumitomo Heavy Industries Ltd
Original Assignee
Sumitomo Heavy Industries 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 Sumitomo Heavy Industries Ltd filed Critical Sumitomo Heavy Industries Ltd
Priority to JP19278486A priority Critical patent/JPS6351121A/en
Publication of JPS6351121A publication Critical patent/JPS6351121A/en
Pending legal-status Critical Current

Links

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To make it possible to know the present value immediately after the restoration from the disconnection of power source on a controller side by a structure wherein a gate, which cuts off a bus line by the output signal from a power source disconnection detecting circuit, is provided so as to continue the positional detection during the disconnection of power source and at the same time to cut off a bus access. CONSTITUTION:Operating power source V1 is applied through a power line 6 to an incremental encoder 1 and a positional detection circuit 2. At the same time, the positional detection is done through a bus interface 5 by data access between the positional detection circuit 2 and a controller side. In this case, when the VE value of the power line 6 goes to 0, the input D of a D-flip-flop goes to a 0 and accordingly the output Q goes to a 1 so as to actuate three-state gates 4 and 4', to which said output Q is inputted as gate signal, in order to cut off the bus interface 5. As a result, back-up power source is fed from a battery 7 to the positional detection circuit 2 and the incremental encoder 1 so as to self-hold the positional detection value.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は射出成形機の位置検出器に関するものである
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a position detector for an injection molding machine.

(従来技術) 射出成形においては温度管理と共に固定側金型に対する
可動側部材の位置把握が制御上の重要なパラメータとな
っており、種々の位置検出器が用いられている。
(Prior Art) In injection molding, temperature control and grasping the position of the movable member relative to the stationary mold are important control parameters, and various position detectors are used.

(この発明が解決すべき問題点) 中でも、コストの点からインクリメンタル型エンコーダ
が一般的に多用されているが、アフ゛ソリュート型の位
置検出器を用いた場合と番よ異なり、インクリメンタル
型エンコーダからのノ々ルスをカウントするカウンタの
(直によってし力)位置がわからない。
(Problems to be Solved by the Invention) Among them, incremental encoders are commonly used from the viewpoint of cost, but unlike when using an absolute position detector, the output from an incremental encoder is I don't know the location of the counter that counts the pulses.

このため、射出成形機のコントローラの電源が瞬間停電
で落ちたり、オペレータが一時的に切断した場合、停電
対策を施していなけれ&f運転再開時に再び零点まで手
動で動かして位置検出カウンタのキャリブレーションを
行なわなくてはならなかった。
For this reason, if the injection molding machine controller's power is cut off due to a momentary power outage, or if the operator temporarily disconnects the power, it is necessary to take measures against the power outage and calibrate the position detection counter by manually moving it to the zero point again when restarting operation. I had to do it.

単なる停電対策としては位置保持回路を備えていれば上
記キャリブレーションは不要でオペレーションが簡易化
されるが、射出成形機の場合には停電中にも機械本体の
方が動く可能性があるので単に位置カウンタの内容を保
持するだけではなくパルスが入力された場合には計数を
続けなくてはならない。
As a simple measure against power outages, if a position holding circuit is installed, the above calibration is unnecessary and operation is simplified, but in the case of an injection molding machine, the machine body may move even during a power outage, so simply In addition to holding the contents of the position counter, it is necessary to continue counting when a pulse is input.

そこで、常に位置を検出するにはバッテリー・バンクア
ップする方法が考えられるが、特に大容量でない限りバ
ッテリーでコントローラ全体を長時間にわたって維持す
ることは難しい。
Therefore, in order to constantly detect the position, a method of increasing the battery bank may be considered, but it is difficult to maintain the entire controller with batteries for a long period of time unless the battery has a particularly large capacity.

さらに、コントローラの電源が落ちている間はバス上が
いかなる状態になっているか特定できないため、パスア
クセスが計数器の誤動作を招く恐れがあった。
Furthermore, since it is not possible to determine what state is on the bus while the power to the controller is off, there is a risk that path access may cause the counter to malfunction.

そこで、この発明は前記の様なインクリメンタル型エン
コーダを用いた位置検出器の不都合な点を解消して、コ
ントローラ側の電源が切れた場合においても位置を検出
し続け、コントローラ側が復旧すると直ちに現在値を知
ることができ、電源の落ちたコントローラとの通信を遮
断すると共に消費電力を抑えることのできる射出成形機
の位置検出器を提供することを目的とする。
Therefore, the present invention solves the disadvantages of the position detector using an incremental encoder as described above, and continues to detect the position even when the power to the controller side is cut off, and immediately detects the current value as soon as the controller side is restored. It is an object of the present invention to provide a position detector for an injection molding machine that can detect the current state of a controller when the power is turned off, cut off communication with a controller whose power has been cut off, and suppress power consumption.

(発明の構成) この発明による射出成形機の位置検出器はコントローラ
側から電源ラインとバスラインが接続されると共に、電
源ラインと接地間には比較的小容量のバッテリーが接続
され、電源ラインに接続されて電源の切断を検出すると
信号を出力する電源切断検出回路と、前記バスライン中
に介挿して接続されると共に前記電源切断検出回路の出
力信号で当該バランスを遮断するゲートとを備えた点に
特徴がある。
(Structure of the Invention) In the position detector for an injection molding machine according to the present invention, a power line and a bus line are connected from the controller side, and a relatively small capacity battery is connected between the power line and the ground. A power disconnection detection circuit that is connected and outputs a signal when detecting power disconnection, and a gate that is inserted and connected to the bus line and shuts off the balance with an output signal of the power disconnection detection circuit. The points are distinctive.

(実 施 例) 以下、図示するこの発明の実施例により説明する。添付
した図面に実施例のブロック図を示した。
(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the drawings. A block diagram of the embodiment is shown in the attached drawing.

射出成型機の可動側部材(図示せず。)にはインクリメ
ンタルエンコーダ1が機械的に接続されており、可動側
部材の変位に伴ってインクリメンタルエンコーダ1から
生成されるパルスは位置検出回路2に入力され、演算処
理により変位量が求められる。
An incremental encoder 1 is mechanically connected to a movable member (not shown) of the injection molding machine, and pulses generated from the incremental encoder 1 as the movable member is displaced are input to a position detection circuit 2. Then, the amount of displacement is determined through arithmetic processing.

この位置検出回路2及びインクリメンタルエンコーダ1
にはコントローラ側から電源ライン6が接続されており
、作動用電源■εは電源ライン6中に介挿されたダイオ
ード3を通してVKとなり各々に供給される。
This position detection circuit 2 and incremental encoder 1
A power line 6 is connected from the controller side, and the operating power source ■ε passes through a diode 3 inserted in the power line 6 and becomes VK and is supplied to each of them.

また、電源ライン6の■1側とGND側の間にはバック
アップ用の比較的小容量のバッテリ=7が接続されてい
る。また、電源ライン6のVa値をD入力とするD−F
、F、が設けられており、■ε 値がOとなった場合に
は出力蓑が1となり、VEが値が0でない場合には出力
百がOとなって後述する電源切断検出回路として作用す
る。
Further, a relatively small capacity battery 7 for backup is connected between the 1 side and the GND side of the power line 6. In addition, a D-F with the Va value of the power supply line 6 as the D input
. do.

さらに、コントローラ側と位置検出回路2との間でデー
タ・アクセスを行なうバスライン5中にはスリーステー
トゲート4.4’が介挿されており、このスリーステー
トゲート4,4′には前記D−F、F、の出力ζがゲー
ト信号として入力される。
Further, a three-state gate 4.4' is inserted in the bus line 5 for data access between the controller side and the position detection circuit 2, and the three-state gates 4, 4' are connected to the D -F, the output ζ of F is input as a gate signal.

以上の構成において、インクリメンタルエンコーダ1と
位置検出回路2には電源ライン6を通して作動電源Vi
 が供給されると共に、位置検出回路2とコントローラ
側との間でバスインターフェース5を介したデータアク
セスにより位置検出が行われる。
In the above configuration, the operating power supply Vi is connected to the incremental encoder 1 and the position detection circuit 2 through the power supply line 6.
At the same time, position detection is performed by data access between the position detection circuit 2 and the controller side via the bus interface 5.

ここで、電源ライン6の■ε値が落ちて0になった場合
、D−F、 F、の入力りはOとなり、従って出力互は
1となるためこの出力ζをゲート信号として入力するス
リーステートゲート4.4′が作動してバスインターフ
ェース5を遮断する。
Here, when the ■ε value of the power supply line 6 drops to 0, the inputs of D-F and F become O, and therefore the outputs become 1, so the three inputs this output ζ as a gate signal. State gate 4.4' is activated and interrupts bus interface 5.

こうして、位置検出回路2はバスインターフェース5に
よるデータアクセスを中止すると共に、位置検出回路2
とインクリメンタルエンコ−ダ1にはハツチリーフから
のバックアップ電源が供給され、位置検出値の自己保持
が行われる。
In this way, the position detection circuit 2 stops data access by the bus interface 5, and the position detection circuit 2
Backup power is supplied from the hatch leaf to the incremental encoder 1, and the position detection value is self-maintained.

また、電源ライン6の■、値が復帰するとD−F、F、
の出力Qが0となり、スリースチートゲ−1−4,4’
が閉じるためパスインターフェース5は再び位置検出回
路2に接続される。
Also, when the value of ■ of power supply line 6 returns, D-F, F,
The output Q becomes 0, and the three cheat game -1-4,4'
Since the path interface 5 is closed, the path interface 5 is connected to the position detection circuit 2 again.

バックアップ用の電源として用いられるバッテリー4は
、インクリメンタルエンコーダ1と位置検出回路2を作
動するのに必要な最小容量のものでよい。
The battery 4 used as a backup power source may have the minimum capacity necessary to operate the incremental encoder 1 and the position detection circuit 2.

(発明の効果) この発明による射出成形機の位置検出器実施例は以上の
通りであり、次に述べる効果を挙げることができる。
(Effects of the Invention) The embodiment of the position detector for an injection molding machine according to the present invention is as described above, and the following effects can be achieved.

インクリメンタル型エンコーダを用いた位置検出器にお
いて、コントローラ側の電源が切れた場合においても位
置を検出し続け、コントローラ側が復旧すると直ちに現
在値を知ることができ、電源の落ちたコントローラとの
通信を遮断すると共に消費電力を押さえることができる
A position detector using an incremental encoder continues to detect the position even if the power to the controller side is cut off, and when the controller side is restored, the current value can be immediately known, and communication with the controller whose power has been cut off is cut off. At the same time, power consumption can be reduced.

【図面の簡単な説明】[Brief explanation of drawings]

図面は発明の実施例を示すブロック図である。 1・・インクリメンタルエンコーダ、2・・位置検出回
路、3・・ダイオード、4.4′・・スリーステートゲ
ート、5・・バスインターフェース、6・・電源ライン
、7・・ノ\ツテリ一 〇
The drawings are block diagrams showing embodiments of the invention. 1. Incremental encoder, 2. Position detection circuit, 3. Diode, 4.4'... Three-state gate, 5. Bus interface, 6. Power line, 7.

Claims (1)

【特許請求の範囲】 射出成形機の可動側部材位置をインクリメンタル型エン
コーダを用いて検出する位置検出器であって、 コントローラ側からの電源を供給する電源ラインとアク
セス用のバスラインが接続され、前記電源ラインと接地
間に接続された比較的小容量のバッテリーと、 前記電源ラインに接続されて電源の切断を検出すると信
号を出力する電源切断検出回路と、前記バスライン中に
介挿して接続されると共に前記電源切断検出回路の出力
信号で当該バスラインを遮断するゲートとを備え、電源
の切断時に位置検出を継続すると共にバスアクセスを遮
断することを特徴とする射出成形機の位置検出器。
[Scope of Claims] A position detector for detecting the position of a movable side member of an injection molding machine using an incremental encoder, wherein a power line supplying power from a controller side and an access bus line are connected, a relatively small capacity battery connected between the power line and ground; a power disconnection detection circuit connected to the power line and outputting a signal when detecting power disconnection; and a power disconnection detection circuit inserted and connected to the bus line. A position detector for an injection molding machine, characterized in that the gate is provided with a gate that cuts off the bus line in response to an output signal of the power cutoff detection circuit, and continues position detection and cuts off bus access when the power is turned off. .
JP19278486A 1986-08-20 1986-08-20 Positional detector of injection molder Pending JPS6351121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19278486A JPS6351121A (en) 1986-08-20 1986-08-20 Positional detector of injection molder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19278486A JPS6351121A (en) 1986-08-20 1986-08-20 Positional detector of injection molder

Publications (1)

Publication Number Publication Date
JPS6351121A true JPS6351121A (en) 1988-03-04

Family

ID=16296941

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19278486A Pending JPS6351121A (en) 1986-08-20 1986-08-20 Positional detector of injection molder

Country Status (1)

Country Link
JP (1) JPS6351121A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02303814A (en) * 1989-05-18 1990-12-17 Mitsubishi Heavy Ind Ltd Detecting and controlling device for position of injection molding machine
US5549095A (en) * 1993-09-30 1996-08-27 Mazda Motor Corporation Power train having supercharged engine
US7179480B2 (en) 2002-04-24 2007-02-20 3M Innovative Properties Company Sustained release microcapsules

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5836432B2 (en) * 1976-09-13 1983-08-09 三菱電機株式会社 magnetic disk drive
JPS60168203A (en) * 1984-02-10 1985-08-31 Mitsubishi Electric Corp Numerical control device
JPS61154316A (en) * 1984-12-27 1986-07-14 Toshiba Corp Position detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5836432B2 (en) * 1976-09-13 1983-08-09 三菱電機株式会社 magnetic disk drive
JPS60168203A (en) * 1984-02-10 1985-08-31 Mitsubishi Electric Corp Numerical control device
JPS61154316A (en) * 1984-12-27 1986-07-14 Toshiba Corp Position detector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02303814A (en) * 1989-05-18 1990-12-17 Mitsubishi Heavy Ind Ltd Detecting and controlling device for position of injection molding machine
US5549095A (en) * 1993-09-30 1996-08-27 Mazda Motor Corporation Power train having supercharged engine
US7179480B2 (en) 2002-04-24 2007-02-20 3M Innovative Properties Company Sustained release microcapsules

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