JPS5824471A - Type selector for printer - Google Patents

Type selector for printer

Info

Publication number
JPS5824471A
JPS5824471A JP12208681A JP12208681A JPS5824471A JP S5824471 A JPS5824471 A JP S5824471A JP 12208681 A JP12208681 A JP 12208681A JP 12208681 A JP12208681 A JP 12208681A JP S5824471 A JPS5824471 A JP S5824471A
Authority
JP
Japan
Prior art keywords
stepping motor
reference position
type wheel
type
print
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
JP12208681A
Other languages
Japanese (ja)
Inventor
Mitsumasa Okabayashi
岡林 光正
Toshio Takahashi
俊夫 高橋
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.)
Juki Corp
Original Assignee
Tokyo Juki Industrial 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 Tokyo Juki Industrial Co Ltd filed Critical Tokyo Juki Industrial Co Ltd
Priority to JP12208681A priority Critical patent/JPS5824471A/en
Publication of JPS5824471A publication Critical patent/JPS5824471A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J7/00Type-selecting or type-actuating mechanisms
    • B41J7/96Means checking correctness of setting

Abstract

PURPOSE:To provide the titled selector capable of easily correcting the disorder of a stepping motor, by a method wherein a reference position of a type wheel is detected by a one-channel photo-encoder, and the rotational angle of a motor is reset to the reference position at each time of a spacing action. CONSTITUTION:At a specificed rotational angle (the reference position) of the photo-encoder 3 which is disk-shaped and is rotated synchronously with the type wheel, an optical path for a light-emitting body L is opened through a hole 3a, and a light-receiving body FT is turned ON. When a space key on a keyboard KB is operated, a microcomputer MC drives the stepping motor SM2 by controlling a driving circuit CS, and then rotates the stepping motor SM1 by controlling a driving circuit LS. When the type wheel comes to the reference position, the stepping motor SM1 is stopped, resulting in a stand-by conidition for waiting for the next command. This disorder-correcting action is performed also after a back-spacing, a line shifting or other similar action.

Description

【発明の詳細な説明】 この発明は、操作キー等をもつ入力手段の発生する制御
信号を入力してその制御信号に基づく電気制御により活
字選択を行うようにした印字機の活字選択装置に関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a type selection device for a printing machine, which inputs a control signal generated by an input means having operation keys, etc., and selects type by electrical control based on the control signal. It is.

従来、上記のような印字機においては、複数の孔をもち
活字選択に同期して変位するいわゆる7オドエンコーダ
を備え、このフォトエンコーダの孔を各別に検出するこ
とにより現在選択されている活字位置の情報を得て、次
に選択すべき活字の指令を受けたときに、検出した現在
の活字位置の情報をフィードバックして閉ループ制御し
〜活字体に連結した直流モータ等の制御モータを作動さ
最低限三つの情報を常に得てこれらの情報をフィードバ
ックさせる必要があるため、フォトエンコーダには複数
または単数の三列の孔から成る8チヤンネルの検出手段
を設けていたが、フィードバックすべき情報が多数ある
ため制御回路が複雑になりコストがかさ心、という欠点
があった。
Conventionally, the above-mentioned printing machines are equipped with a so-called 7-odd encoder that has a plurality of holes and is displaced in synchronization with the selection of type, and the position of the currently selected type is detected by individually detecting the holes of this photo encoder. When receiving the next command for the type of type to be selected, the system feeds back the detected current position of the type to perform closed-loop control and operate a control motor such as a DC motor connected to the type. Since it is necessary to always obtain at least three types of information and feed back this information, the photo encoder was equipped with an eight-channel detection means consisting of multiple or single three rows of holes, but the information to be fed back was Since there are a large number of them, the control circuit becomes complicated and the cost increases.

そこで、活字体にステッングモータを連結し、このステ
ッピングモータを開ループ制御することにより活字選択
を行うようにし、簡単な回路構成で制御動作を行うよう
にしたものがあるが、活字体を高速で作ψ・Jさせると
ステッピングモータがしばしば脱調を起こし活字選択が
不正確になる、とという欠点があった。
Therefore, there is a method that connects a stepping motor to the typeface and performs open-loop control of this stepping motor to perform control operation with a simple circuit configuration. There was a drawback in that when ψ/J was produced, the stepping motor often went out of step and the type selection became inaccurate.

この発明は、ステッピングモータを使用するとともに簡
単な構成によりステッピングモータの脱調を容易に捕正
し得るようにすることにより上記従来の欠点を除去する
ことを目的とする。
An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional art by using a stepping motor and making it possible to easily correct step-out of the stepping motor with a simple configuration.

以下、図面によりこの発明の詳細な説明すると、第1図
はキャリッジ(図示しかい)に搭載される活字選択装置
である。1は周知の花弁型活字ホイールであり、円周方
向に配列して複数のスポークの各先端に配置した異なる
活字を設けである。2は印字ハンマーであり、活字ホイ
ール1の活字の移動経路にピングモータであり、その駆
動軸には活字ホイール1を同心上に固定し、作動により
活字ホイール1を回動させ印字ハンマー2に活字ホイー
ルlの所定の活字を対向させる活字選択動作を可能とす
る。
Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a type selection device mounted on a carriage (only shown). Reference numeral 1 denotes a well-known petal type type wheel, which is provided with different types arranged in a circumferential direction and arranged at each end of a plurality of spokes. Reference numeral 2 designates a printing hammer, which is a ping motor in the moving path of the type on the type wheel 1, with the type wheel 1 fixed concentrically to its drive shaft, and the type wheel 1 being rotated by operation, the type is transferred to the printing hammer 2. This enables a character selection operation in which predetermined characters on the wheel l face each other.

8は円盤状の7オトエンコーダであり、ステッピングモ
ータSMIの活字ホイールエとは反対側の駆動軸にその
中心部を固定して活字ホイール1と同期して回動し単数
の孔8aを有している。
Reference numeral 8 denotes a disk-shaped 7-oto encoder, whose center part is fixed to the drive shaft on the opposite side of the stepping motor SMI from the type wheel 1, rotates in synchronization with the type wheel 1, and has a single hole 8a. There is.

4は枠体であり、フォトエンコーダ8の表裏に対向する
ようにキャリッジに固定し、発光体(発光ダイオード)
L、と受光体(フォトトランジスタ)FTとを7オトエ
ンコーダ8を挾んで対向配置し、7オ)エンコーダ8の
一特定回動角(基準位置とする)において孔8aにより
発光体L1の光路な開いて受光体FT 1iオンさせる
ようにしている(第2図)。
4 is a frame, which is fixed to the carriage so as to face the front and back of the photo encoder 8, and a light emitting body (light emitting diode)
L, and a photoreceptor (phototransistor) FT are arranged facing each other with an encoder 8 in between, and the optical path of the light emitter L1 is set by the hole 8a at a specific rotation angle of the encoder 8 (reference position). It is opened to turn on the photoreceptor FT 1i (Fig. 2).

jiに制御回路について説明すると、第8図において、
MCはCPU(中央処理装置)、RAM(ランダムアク
セスメモリ)、ROM(リードオンメモリ)から成る周
知のマイクシコンピユータ(以下マイコンとする)であ
る。KBは、印字キー。
To explain the control circuit to ji, in Fig. 8,
MC is a well-known microcomputer (hereinafter referred to as microcomputer) consisting of a CPU (central processing unit), RAM (random access memory), and ROM (read-on memory). KB is the print key.

スペースキーや各種ファンクションキー等の操作キーを
もつキーボードであり、操作キーの操作により所定のデ
ジタルコードなマイコンMCに入力する。Iloはイン
ターフェース装置であり、外部のパーソナルコンピュー
タ等の指令により印字動作を行うためにパーソナルコン
ピュータ等の指令により印字動作を行うために使用され
る。DTは検出手段であり、前記したフオ(エンコーダ
8と、発光体りと受光体FTとで構成され、発光体りの
照光による受光体FT、の出力信号をマイコさせるスペ
ース動作のためのステッピングモータ8M2の駆動回路
であり、それぞれマイコンMCの指令により所定ステッ
プ数ステッピングモータを駆動させる。HDはハンマー
付勢回路であり、マイコンMeの指令により印字ハンマ
−2を印字動作させる。
This is a keyboard with operation keys such as a space key and various function keys, and a predetermined digital code is input to the microcomputer MC by operating the operation keys. Ilo is an interface device, and is used to perform a printing operation according to instructions from an external personal computer or the like. DT is a detection means, which is composed of the encoder 8, a light emitter, and a photoreceptor FT, and is a stepping motor for space operation that outputs the output signal of the photoreceptor FT by illumination of the light emitter. 8M2 driving circuits, each of which drives a stepping motor a predetermined number of steps in response to a command from the microcomputer MC.HD is a hammer energizing circuit, which causes the printing hammer 2 to perform a printing operation in response to a command from the microcomputer Me.

次に、マイコンMCに記載した活字選択機能に係るプロ
グラムの70−チャート(第4図)について説明すると
、先ず、動作指令、即ちキーボードK1mの操作または
インターフェースI10を介しての外部指令信号がある
と、それ逆印字指令であるか否かを「判断」シ、印字以
外の指令、即ちキャリッジのスペース、改行、パックス
ペース。
Next, to explain the 70-chart (Fig. 4) of the program related to the type selection function written in the microcomputer MC, first, when there is an operation command, that is, an operation of the keyboard K1m or an external command signal via the interface I10. , it "determines" whether it is a reverse printing command or not, and commands other than printing, namely carriage spaces, line breaks, and pack spaces.

タプレーション等の指令であればその指令に従い所定の
動作を行い、その所定動作が終了してから、また動作指
令がなければ直ちに受光体FT主がオンか否かを「判断
」する。受光体FT主がオンでかければ駆動回路L8を
制御してステッピングモータS Mlを所定方向(例え
ば第1@時計方向)に回動させ、受光体FT主がオン、
即ち活字ホイール1が基準位置に来た時点で、また既に
受光体FT主がオンであれば直ちに、ステッピングモー
タSMIを停止させ−る。
If it is a command such as taplation, a predetermined operation is performed in accordance with the command, and after the predetermined operation is completed, or if there is no operation command, it is immediately determined whether the photoreceptor FT main is on or not. When the main photoreceptor FT is turned on, the drive circuit L8 is controlled to rotate the stepping motor S Ml in a predetermined direction (for example, the first clockwise direction), and the main photoreceptor FT is turned on.
That is, as soon as the type wheel 1 comes to the reference position, or if the photoreceptor FT main is already on, the stepping motor SMI is stopped.

さて、マイコンMCは検出手段DTの受光手段胃がオン
に表った後に駆動回路LBがステッピングモータ8MI
KtB力した駆動パルスの数即ち、活字ホイールlの現
在の回動位置を記憶している。そこでキーボードKBの
印字キーの操作により、またはインターフェース手段I
10を介して「印字指令」が入力されると、マイコンM
Cは「活字選択動作」に基づびその「印字指令」が指令
する活字ホイール1の回動位置と、活字ホイール1の現
在の回動位置とからステッピングモータ8M1が回動す
べき方向及びそのステップ数を演算して駆動回路LSを
#御させる。「活字選択動作」が終了すると、へンマー
付勢回路HDを制御して印字ハンマー2の印字動作を行
なった後、駆動回路C8を制御してステッピングモータ
8M2を駆動させキャリッジの「スペース動作」を行い
、再び「動作指令」の「判断」に戻る。
Now, in the microcomputer MC, after the light receiving means stomach of the detecting means DT is turned on, the driving circuit LB is connected to the stepping motor 8MI.
The number of drive pulses applied by KtB, ie, the current rotational position of the type wheel l, is memorized. Therefore, by operating the print key on the keyboard KB or by using the interface means I.
When a "printing command" is input via 10, the microcomputer M
C is the direction in which the stepping motor 8M1 should rotate based on the rotation position of the type wheel 1 instructed by the "print command" based on the "type selection operation" and the current rotation position of the type wheel 1, and the step thereof. A number is calculated to control the drive circuit LS. When the "type selection operation" is completed, the hammer energizing circuit HD is controlled to perform the printing operation of the printing hammer 2, and then the drive circuit C8 is controlled to drive the stepping motor 8M2 to perform the "space operation" of the carriage. Then, return to "Judgment" of "Operation command" again.

以上の構成において、キーボードKBの印字キーを操作
すると、所定の印字指令がマイコンMCに出され、マイ
コンMCは活字ホイール1の現在の回動位置とこの印字
指令が指令する活字ホイール1の回動位置とからステッ
ピングモータ8M1を駆動させるべき回動方向及びステ
ップ数を演算し、この演算結果に基づいて駆m@路LS
を制御し、ステッピングモータSMIを駆動させて活字
本イールエを回動させ、所定の活字の永択動作を行う。
In the above configuration, when the print key of the keyboard KB is operated, a predetermined print command is issued to the microcomputer MC, and the microcomputer MC determines the current rotational position of the type wheel 1 and the rotation of the type wheel 1 instructed by this print command. The rotation direction and number of steps to drive the stepping motor 8M1 are calculated from the position, and the driving m@path LS is calculated based on the calculation result.
is controlled, the stepping motor SMI is driven, the type book is rotated, and a predetermined type selection operation is performed.

活字選択動作が終了するとへンマー付勢回路HDを制御
して印字ハンマー2の印字動作を行い、所定の印字を行
った後、駆動回路CSをF/lJgEしてステッピング
モーv喧zを駆動させキャリッジのスペース動作を行う
。以上のような印字動作を複数回行い、必要に応じてス
ペースキーな操作スペース動作を行なった後に、駆動回
路L8を制御してステッピングモータ8M1を時計方向
(第1vA)に回動させる。こうしてフォトエンコーダ
8の孔8aにより発光体りの光路が開かれて受光体FT
がオン、即ち活字ホイール1が基準位置に来たときステ
ッピングモータ8M1を停止させ次の指令を待機する状
態となる。スペースキーな操作した時点で、マイコンM
Cが記憶している駆動パルスの数とステッピングモータ
SMIQ回動角の活字ホィール1基準位置からのステッ
プ数とが一致していな一状態、即ちステッピングモータ
SM1が脱調状態にあっても、上記の動作により活字ホ
イール10基準位置とステッピングモータSM1のステ
ップ敷写の回動角とが一致することになり、脱調は補正
される。この脱調補正動作はスペースキーの操作後のみ
でなく、パックスペース。
When the character selection operation is completed, the hammer energizing circuit HD is controlled to cause the printing hammer 2 to perform a printing operation, and after performing predetermined printing, the drive circuit CS is F/lJgE to drive the stepping mode vdinz. Carriage space movement. After performing the above-described printing operation a plurality of times and performing an operation space operation such as a space key as necessary, the driving circuit L8 is controlled to rotate the stepping motor 8M1 clockwise (1st vA). In this way, the optical path of the light emitter is opened by the hole 8a of the photo encoder 8, and the optical path of the light emitter FT is opened.
is on, that is, when the type wheel 1 comes to the reference position, the stepping motor 8M1 is stopped and the next command is waited for. When you press the space key, the microcomputer M
Even if the number of drive pulses stored in C does not match the number of steps of the rotation angle of the stepping motor SMIQ from the reference position of the type wheel 1, that is, even if the stepping motor SM1 is out of step, the above As a result of this operation, the reference position of the type wheel 10 and the step rotation angle of the stepping motor SM1 match, and the step-out is corrected. This step-out correction operation is performed not only after the space key operation, but also after the pack space.

改行等の動作の後あるいは動作指令がない場合にも行な
われる。
It is also performed after an action such as a line feed or when there is no action command.

以上のように、この発明によれば、ステッピングモータ
により活字選択を行うので、開ループによる簡単な回路
構成の制御が可能となりコスシを低減できるとともに、
きわめて簡単な1チヤンネルの7オトエンコーダを設け
て活字ホイールの一特定の基準位置を検出することによ
り、印字指令以外のスペース、バックスペース、改行等
の動作指令毎にステッピングモータの回動角をこの基準
位置に復帰させるようにしたので、印字動作中にステッ
ピングモータの脱調が発生しても、その脱調は印字動作
の合間に頻繁に行なわれるスペース動作の度毎に液止さ
れることにがり、活字選択の動作ミスを著しく低減させ
るという効果がある。
As described above, according to the present invention, since type selection is performed using a stepping motor, it is possible to control a simple circuit configuration using an open loop, reducing cost.
By installing a very simple 1-channel 7-way encoder to detect a specific reference position of the type wheel, the rotation angle of the stepping motor can be adjusted in response to each movement command such as space, backspace, line feed, etc. other than print commands. Since the stepping motor is returned to the reference position, even if the stepping motor loses synchronization during printing, the step-out will be stopped every time the space operation is performed frequently between printing operations. , which has the effect of significantly reducing operation errors in character selection.

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

第1図は本願の活字選択装置の要部斜視図、第2図はフ
ォトエンコーダと発光体及び受光体との配置を示す図、
第8図は制御回路のプルツク図、第4図はマイクロコン
ピュータに記載したプログラムのフローチャートである
。 lΩ ・ ・活字体、SMl ・ ・−ステッピングモ
ータL13 el @ O駆動回路、KBoO・キーホ
ード8 、  L’、・FT O110位置検出手段M
C・−0第一制御回路、第二制御回路、指令回路 代理人の氏名 弁理士 名古屋 −雄 vJ1図
FIG. 1 is a perspective view of the main parts of the type selection device of the present application, FIG. 2 is a diagram showing the arrangement of a photo encoder, a light emitter, and a light receiver;
FIG. 8 is a pull diagram of the control circuit, and FIG. 4 is a flowchart of a program written in the microcomputer. lΩ ・・Print, SML ・ ・-Stepping motor L13 el @ O drive circuit, KBoO・Keychain 8, L',・FT O110 Position detection means M
C・-0 First control circuit, second control circuit, command circuit agent's name Patent attorney Nagoya-Yu vJ1 diagram

Claims (1)

【特許請求の範囲】 複数の異なる活字をもつ活字体と、 駆動により複数の活字のうち任意の一つを選択可能とす
るように活字体に連結したステッピングモータと、 ステッピングモータを駆動・停止可能とした駆動回路と
、 複数の印字キー、スペースキー等の操作キーを含もキー
ボードをもち各印字キーの操作により異なる所定の印字
信号を発生する入力手段と、印字キーまたはスペースキ
ーの操作の終了を検知してその終了毎に操作終了信号を
発生する操作検知手段と、 ステッピングモータに関連配置しステッピングモータの
一特定回動角に関連して原点信号を発生する検出手段と
、 印字信号に関連して所定の活字を選択する回動角までの
ステップ数だけステッピングモータを駆動させるように
駆動回路を制御する第一制御回路と、 作用により所定方向へステッピングモータを駆動させる
ように駆動回路を制御する第二制御回路と、 操作終了信号の発生に関連して第二制御回路を作用させ
原点信号の発生に関連して第二制御回路を不作用にする
指令回路、 とを備えた印字機の活字選択装置。
[Scope of Claims] A typeface having a plurality of different typefaces, a stepping motor connected to the typeface so that any one of the plurality of typefaces can be selected by driving, and the stepping motor capable of being driven and stopped. a drive circuit, an input means that has a keyboard including operation keys such as a plurality of print keys and a space key, and generates a different predetermined print signal depending on the operation of each print key; an operation detection means that detects the operation and generates an operation end signal each time the operation is completed; a detection means that is arranged in relation to the stepping motor and generates an origin signal in relation to a specific rotation angle of the stepping motor; and a detection means related to the print signal. a first control circuit that controls the drive circuit to drive the stepping motor by the number of steps up to a rotation angle that selects a predetermined type; and a first control circuit that controls the drive circuit to drive the stepping motor in a predetermined direction by action. and a command circuit that causes the second control circuit to operate in connection with the generation of the operation end signal and inactivates the second control circuit in connection with the generation of the origin signal. Type selection device.
JP12208681A 1981-08-04 1981-08-04 Type selector for printer Pending JPS5824471A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12208681A JPS5824471A (en) 1981-08-04 1981-08-04 Type selector for printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12208681A JPS5824471A (en) 1981-08-04 1981-08-04 Type selector for printer

Publications (1)

Publication Number Publication Date
JPS5824471A true JPS5824471A (en) 1983-02-14

Family

ID=14827299

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12208681A Pending JPS5824471A (en) 1981-08-04 1981-08-04 Type selector for printer

Country Status (1)

Country Link
JP (1) JPS5824471A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3414981A1 (en) * 1983-04-19 1984-10-25 Tokyo Juki Industrial Co., Ltd., Tokio/Tokyo DEVICE FOR SPEED CONTROL OF A STEPPER MOTOR
JPS6274669A (en) * 1985-09-30 1987-04-06 Tokyo Juki Ind Co Ltd Type selector for printer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5584687A (en) * 1978-12-21 1980-06-26 Brother Ind Ltd Electronic typewriter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5584687A (en) * 1978-12-21 1980-06-26 Brother Ind Ltd Electronic typewriter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3414981A1 (en) * 1983-04-19 1984-10-25 Tokyo Juki Industrial Co., Ltd., Tokio/Tokyo DEVICE FOR SPEED CONTROL OF A STEPPER MOTOR
JPS6274669A (en) * 1985-09-30 1987-04-06 Tokyo Juki Ind Co Ltd Type selector for printer

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