JPS595233A - Control device for scanning mechanism for copying machine - Google Patents

Control device for scanning mechanism for copying machine

Info

Publication number
JPS595233A
JPS595233A JP57113706A JP11370682A JPS595233A JP S595233 A JPS595233 A JP S595233A JP 57113706 A JP57113706 A JP 57113706A JP 11370682 A JP11370682 A JP 11370682A JP S595233 A JPS595233 A JP S595233A
Authority
JP
Japan
Prior art keywords
signal
scanning
copying machine
size
motor
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
JP57113706A
Other languages
Japanese (ja)
Inventor
Kazunori Ishihara
和憲 石原
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP57113706A priority Critical patent/JPS595233A/en
Publication of JPS595233A publication Critical patent/JPS595233A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00Photographic printing apparatus
    • G03B27/32Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52Details
    • G03B27/522Projection optics
    • G03B27/525Projection optics for slit exposure

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To eliminate the waiting time in the starting position for scanning by calculating the backward moving speed in the stage of scanning on the basis of the copying time predetermined according to the size of paper and driving a motor on the basis of the calculated value. CONSTITUTION:When the scale-down signal assigned by the operator is inputted through an input interface 11 to a signal processing part 1, the signal is processed in a CPU13, and the control signal corresponding to the scale-down is outputted from one of output ports P2-P4. A reference frequency signal and a time constant signal are outputted from a generation circuit 32 for a reference frequency and a multiplexer 33. On the other hand, when a paper size signal is inputted to the part 1, the control signal corresponding to said size is fed from one of ports P5-P7 to a control part 3, by which the backward moving speed in the stage of scanning is calculated on the basis of the copying time predetermined according to the size of the paper and a motor 2 is driven at said speed; therefore, the increase in the waiting time in the starting position for the scanning is prevented.

Description

【発明の詳細な説明】 本発明はコピー用紙サイズに係わシなく常に一定のタイ
ミングでスキャンニング開始ができるようにした複写機
用走査機構制御装置に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scanning mechanism control device for a copying machine that can always start scanning at a constant timing regardless of copy paper size.

複写機用走査機構制御装置として、例えば、原稿を載置
して移動する移動原稿台、あるいは移動するランプなら
びにレンズを有する移動光学系を備えた走査用移動機構
を有するものがおる。かかる走査用移動機構の移動に際
しては、DCサーボモータ等の駆動モータによシ駆動し
、核駆勧モータに対する制御は演算手段ならびに速度比
較手段等含有した制御回路によって行なわれる。従来の
複写機用走査機構制御装置によれば、制御を容易にする
ことからスキャン長に関係なく一定の速度で復動するよ
うになっている。斯る構成において、原稿走査に基いて
感光体ドラム上に露光し、現像および転写工程の後定着
することによシコピーされる。コピー操作時、等倍コピ
ーモードにおいては、スキャン長と感光体ドラム上の露
光領域の長さ、換言すればコピー用紙の長さが対応して
いるが、縮倍率コピーモードにおいては、スキャン長に
対する感光体ドラム上の露光領域の長さを縮倍率比に応
じて変化させて縮倍率コピーを得ることができる。
Some copying machine scanning mechanism control devices include, for example, a scanning moving mechanism that includes a movable document table on which a document is placed and moves, or a moving optical system having a moving lamp and lens. When the scanning moving mechanism is moved, it is driven by a drive motor such as a DC servo motor, and the nuclear evacuation motor is controlled by a control circuit that includes calculation means, speed comparison means, and the like. According to a conventional scanning mechanism control device for a copying machine, the scanning mechanism is designed to move backward at a constant speed regardless of the scan length in order to facilitate control. In such a configuration, the image is copied by exposing the photoreceptor drum to light based on scanning of the original, and fixing the image after development and transfer steps. During a copy operation, in the full-size copy mode, the scan length corresponds to the length of the exposed area on the photoreceptor drum, in other words, the length of the copy paper, but in the reduced-magnification copy mode, the scan length corresponds to the length of the exposed area on the photoreceptor drum. A reduced magnification copy can be obtained by changing the length of the exposure area on the photosensitive drum according to the magnification ratio.

しかし1、従来の複写機用走査機構制御装置にあっては
、スキャン長に比してコピー用紙の長さが犬になる拡大
時には復動時間の現像時間等に対する時間比が小になる
ことからスキャン開始位置に長くとどまってスキャン開
始を待つため、特定部分の温度上昇を招く恐れがあシ、
また、待ち時間が相違してくるためそれに対応した複雑
なコントロールが要求される。
However, 1. With conventional scanning mechanism control devices for copying machines, when the length of the copy paper becomes larger than the scan length, the ratio of the return movement time to the development time etc. becomes small. Because it stays at the scan start position for a long time waiting for the scan to start, there is a risk of temperature rise in certain parts.
Furthermore, since the waiting times vary, complex control corresponding to the difference is required.

本発明は上記に鑑みてなされたものであシ、スキャン開
始位置での待ち時間を無くすため、スキャンに要する時
間に対応した時間で戻すようにした複写機用走査機構制
御装置を提供するものである。
The present invention has been made in view of the above, and provides a scanning mechanism control device for a copying machine that returns the scanning mechanism at a time corresponding to the time required for scanning in order to eliminate waiting time at the scanning start position. be.

以下、本発明による複写機用走査機構制御装置を詳細に
説明する。
Hereinafter, a scanning mechanism control device for a copying machine according to the present invention will be explained in detail.

第1図は本発明の一実施例を示し、複写機の操作を指令
するオペレータ信号あるいは複写機各部の状態に応じた
センサ信号等の信号入力があったとき、これらの信号を
処理あるいは演算し、これらに応じた制御信号を出力す
る例えばマイクロコンピュータを用いた信号処理部1と
、該信号処理部1よシ出力される制御信号に基づいてモ
ータ2vf−制御する制御部3とよシ構成される。信号
処理部11モータ2および制御部3は、第2図に示す複
写機本体4内に収容され、モータ2によって原稿台5は
コピー用紙に応じた走査距離分だけ往復動する。
FIG. 1 shows an embodiment of the present invention, in which when there is a signal input such as an operator signal instructing the operation of a copying machine or a sensor signal depending on the status of each part of the copying machine, these signals are processed or calculated. , a signal processing section 1 using, for example, a microcomputer, which outputs control signals corresponding to these, and a control section 3, which controls the motor 2vf based on the control signals outputted from the signal processing section 1. Ru. The signal processing section 11, motor 2, and control section 3 are housed in a copying machine main body 4 shown in FIG. 2, and the motor 2 causes the document table 5 to reciprocate by a scanning distance corresponding to the copy paper.

信号処理部1は、オペレータの操作にともなう各攬キー
よシの信号あるいは各部に設置されたセンサよシの信号
等を入力する入力インターフェース11と、複写機の走
査機構制弧コピー制御、給紙制御等の処理ならびに必要
な演算を行うためのプログラムが格納される不揮発性の
メモリであるROM 12と、該ROM i 2に格納
されたプログラムに従って処理、演算、制御指令出刃等
を行う中央処理装ft(CPU)13と、入力データ、
演算結果等を一時的に記憶する揮発性のメモリであるR
AM14と、CPU 13の指令に基づき複数種の制御
信号を制御部3に出力する出力インタフェース15とよ
シ構成される。
The signal processing unit 1 includes an input interface 11 that inputs signals from each key or sensors installed in each part in response to operator operations, and controls copying control of the copying machine's scanning mechanism and sheet feeding. A ROM 12 is a non-volatile memory that stores programs for processing such as control and performing necessary calculations, and a central processing unit that performs processing, calculations, control commands, etc. according to the programs stored in the ROM i 2. ft (CPU) 13 and input data,
R is a volatile memory that temporarily stores calculation results, etc.
It is composed of an AM 14 and an output interface 15 that outputs a plurality of types of control signals to the control section 3 based on instructions from the CPU 13.

出力インタフェース15は、スター)信号を出力するボ
ートP1と、コピースルモードに応じ、且つ、後述する
本発明の復動速度に応じた3種の縮倍率信号を出力 するボートp2 1 Ps  l P4と、複数の用紙
サイズ(本実施例では3種の用紙サイズ)信号を出力す
るボートP81PM  IP??有する。
The output interface 15 includes a boat P1 that outputs a star (star) signal, and a boat p2 1 Ps l P4 that outputs three types of reduction ratio signals depending on the copy-through mode and the backward motion speed of the present invention, which will be described later. , a boat P81PM IP? that outputs signals for multiple paper sizes (three paper sizes in this embodiment). ? have

また、制御部3は、モータ2に内蔵されたパルス発生器
2aが出力するパルス信号(モータ2の回転数に応じた
周波数を発生する)を波形整形する波形整形回路31と
、縮倍率信号に基いて縮倍率に応じた基準周波数信号を
出力する基準周波数発生回路32と、前記縮倍率に応じ
た時定数の時定数信号を出力するマルチプレクサ33と
、波形整形された前記パルス信号と前記基準周波数信号
を位相比較する位相比較器34と、波形整形された前記
パルス信号を計数する第1カウンタ35と、波形整形さ
れた前記パルス信号と前記時定数信号を比較する速度比
較器36と、用紙サイズ信号に基いて用紙サイズに応じ
て予め定めた値の信号を出力する第2カウンタ37と、
位相比較器34および速度比較器36の出力信号の加算
値と三角波発生器38の基準三角波信号を比較する差動
増幅器39と、第1および第2カウンタ35,37の出
力信号を比較する比較器40と、出力インクフェース1
5のボート1からスタート信号が出力されて駆動スイッ
チ41がオンしたとき(VDは駆動電圧)差動増幅器3
9の出力に応じた速度と比較器40の出力に応じた回転
方向信号に基いてモータ2を駆動制御する駆動回路42
を有している。
The control unit 3 also includes a waveform shaping circuit 31 that shapes the pulse signal (generates a frequency according to the number of rotations of the motor 2) output by the pulse generator 2a built in the motor 2, and a waveform shaping circuit 31 that shapes the pulse signal (generates a frequency according to the number of rotations of the motor 2), and a reduction factor signal. a reference frequency generation circuit 32 that outputs a reference frequency signal according to the scaling factor based on the scaling factor, a multiplexer 33 that outputs a time constant signal with a time constant that depends on the scaling factor, and the waveform-shaped pulse signal and the reference frequency. A phase comparator 34 that compares the phases of signals, a first counter 35 that counts the waveform-shaped pulse signal, a speed comparator 36 that compares the waveform-shaped pulse signal and the time constant signal, and a paper size a second counter 37 that outputs a signal with a predetermined value depending on the paper size based on the signal;
A differential amplifier 39 that compares the sum of the output signals of the phase comparator 34 and the speed comparator 36 with a reference triangular wave signal of the triangular wave generator 38, and a comparator that compares the output signals of the first and second counters 35 and 37. 40 and output ink face 1
When the start signal is output from the boat 1 of 5 and the drive switch 41 is turned on (VD is the drive voltage), the differential amplifier 3
a drive circuit 42 that drives and controls the motor 2 based on a speed corresponding to the output of the comparator 9 and a rotational direction signal corresponding to the output of the comparator 40;
have.

以上の構成において、その操作を説明するにオペレータ
が指定した縮倍率の縮倍率信号が入力インタフェース1
1から信号処理部1へ入力するとCPU 13で信号処
理され、その縮倍率に応じて出力インタフェース15の
ボートPzeP3あるいはP4の1つのボートからその
縮倍率に応じた制御信号が出力される。該制御信号を入
力した基準周波数発生回路32およびマルチプレクサ3
3は縮倍率に応じた基準周波数信号および時定数信号を
出力する。
In the above configuration, to explain the operation, the scaling factor signal of the scaling factor specified by the operator is input to the input interface 1.
1 to the signal processing unit 1, the signal is processed by the CPU 13, and a control signal corresponding to the scaling factor is output from one of the ports PzeP3 or P4 of the output interface 15, depending on the scaling factor. Reference frequency generation circuit 32 and multiplexer 3 into which the control signal is input
3 outputs a reference frequency signal and a time constant signal according to the reduction ratio.

一方、用紙サイズ信号が入力インタフェース11を介し
て信号処理部1へ入力するとCPU13で信号処理され
、その用紙サイズに応じて出力インタフェース15のボ
ー)PHI  +P@あるいはP7の1つのボートから
その用紙サイズに応じた制御信号が出力される。該制御
信号を入力した第2カウンタ37はその用紙サイズに応
じた設定値を出力する。コンソール上のスタートボタン
が操作されると、同じように信号処理部1で信号処理さ
れ、出力インタフェース15のボート1からスタート信
号が出力されて駆動スイッチ41がオンする。しかし、
まだパルス発生器2aがパルス信号を出力する状態にな
っていないため、第1カウンタ35の計数値が第2カウ
ンタ37の設定値よシ小さく、それによって比較器40
がモータ2を走査方向に駆動する比較信号を出力する。
On the other hand, when a paper size signal is input to the signal processing unit 1 via the input interface 11, the signal is processed by the CPU 13, and depending on the paper size, the paper size signal is output from one port of the output interface 15) PHI +P@ or P7. A control signal corresponding to the output is output. The second counter 37 which receives the control signal outputs a setting value corresponding to the paper size. When the start button on the console is operated, the signal is similarly processed by the signal processing unit 1, a start signal is output from the port 1 of the output interface 15, and the drive switch 41 is turned on. but,
Since the pulse generator 2a is not yet in a state where it outputs a pulse signal, the count value of the first counter 35 is smaller than the set value of the second counter 37.
outputs a comparison signal that drives the motor 2 in the scanning direction.

また、モータ2がまだ駆動されていないため、位相比較
器34および速度比較器36の出力加算値と基準三角波
信号の差信号を出力する差動増幅器39の信号が増速方
向のものとなり、該信号と前記比較信号を入力した駆動
回路42がモータ2を駆動し、それによって走査用移動
機構(図示せず)を走査方向に増速する。走査が進行し
て第1カウンタ35の計数値が第2カウンタ37の設定
値に達したとき比較器40の出力が反転するため、反転
比較信号を入力した駆動回路42によってモータ2が逆
(リターン)方向に駆動され、走査用移動機構がホーム
ポジションまで戻されて停止する。
In addition, since the motor 2 is not yet driven, the signal of the differential amplifier 39 that outputs the difference signal between the output addition value of the phase comparator 34 and the speed comparator 36 and the reference triangular wave signal is in the direction of speed increase. The drive circuit 42 inputting the signal and the comparison signal drives the motor 2, thereby increasing the speed of the scanning moving mechanism (not shown) in the scanning direction. When the scan progresses and the count value of the first counter 35 reaches the set value of the second counter 37, the output of the comparator 40 is inverted, so the motor 2 is reversed (return) by the drive circuit 42 to which the inverted comparison signal is input. ) direction, and the scanning moving mechanism is returned to the home position and stopped.

ここで本発明による復動速度制御について説明する。Here, the double-acting speed control according to the present invention will be explained.

コピー用紙のサイズ毎に変わる縮倍率にかかわらず、1
コピーに要する時間を一定にするために、次に示す演算
式をROM 12にプログラムにしておき、コピー開始
前に起動させる。
Regardless of the reduction ratio that changes depending on the size of copy paper, 1
In order to make the time required for copying constant, the following calculation formula is programmed in the ROM 12 and activated before copying starts.

復動速度υ は次式で与えられるものとする。The backward movement speed υ is given by the following formula.

υ = I/(T −t ) = L/ly= L/(
T −−) = L、に/(K−T−L)但し、 T:
1コピーの時間 tx:往動時間(縮倍率によシ異る) ty:復動時間 L:用紙サイズ に:縮倍率 txにL/K  である。
υ = I/(T - t) = L/ly= L/(
T −-) = L, ni/(K-T-L) However, T:
Time for one copy tx: forward movement time (depending on the reduction ratio) ty: return movement time L: paper size: reduction ratio tx L/K.

このようにして算出されたt’yを基準周波数に変換し
、さらに、基準周波数を縮倍率信号(P2〜Pg )に
変換し出力インタフェース15より出力する。
The thus calculated t'y is converted into a reference frequency, and the reference frequency is further converted into a reduction ratio signal (P2 to Pg), which is output from the output interface 15.

縮倍率信号と、これに応当する復動速度υアの関係は、
予めテーブルとしてメモリに記憶させておき算出したv
yに応当する縮倍率信号を読み出すようにする。コピー
用紙サイズLはオペレータによって指定されたものを入
力インタフェース11よシ読込み、コピ一時間T1縮倍
率に等は予め設定されている。縮倍率信号を受ヴた制御
部3の動作は前述した通シであるので説明を省略する。
The relationship between the reduction ratio signal and the corresponding backward motion speed υa is as follows:
v calculated by storing it in memory as a table in advance
The scaling factor signal corresponding to y is read out. The copy paper size L specified by the operator is read through the input interface 11, and the copying time, T1 reduction ratio, etc. are set in advance. The operation of the control unit 3 upon receiving the reduction ratio signal is the same as that described above, so a description thereof will be omitted.

復動時間を算出するだめの信号処理部による処理の一例
を示したのが第3図のフローチャートである。
The flowchart in FIG. 3 shows an example of the processing by the signal processing section for calculating the return movement time.

以上説明した通り、本発明の複写機用走査機構制御装置
によれば、コピーモード(拡大、縮小、等倍)によらず
用紙サイズ毎に常に一定のコピー速度が得られるように
したため、シーケンス制御をシンプル化しながら走査機
構のスキャン開始位置における待ち時間の増加を防ぐこ
とができる。
As explained above, according to the scanning mechanism control device for a copying machine of the present invention, a constant copying speed can always be obtained for each paper size regardless of the copy mode (enlargement, reduction, same size), so sequence control is possible. While simplifying the process, it is possible to prevent an increase in the waiting time at the scanning start position of the scanning mechanism.

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

第1図は本発明の1実施例を示すブロック図、第2図は
複写機の外観の一例を示す斜視図、第3図は本発明の処
理の一例全示す70−チャートである。 符号の説明 1・・・信号処理部、  2・・・モータ、 2m・・
・パルス発生器、 3・・・制御部。 1需■
FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a perspective view showing an example of the external appearance of a copying machine, and FIG. 3 is a 70-chart showing an entire example of the processing of the present invention. Explanation of symbols 1...Signal processing unit, 2...Motor, 2m...
・Pulse generator, 3...control unit. 1 demand■

Claims (1)

【特許請求の範囲】 縮倍率に応じて出力される基準周波数に基づいて駆動さ
れるモータによシ走査機構を複写機の用紙サイズに応じ
た走査距離だけ移動させる複写機用走査機構制御装置に
おいて、 前記用紙サイズに応じて予じめ定めたコピ一時間に基い
てスキャンユング時の復動速度を算出し、該算出値に基
いて前記基準周波数を決定する手段を備えたことを特徴
とする複写機用走査機構制御装置。
[Scope of Claims] A scanning mechanism control device for a copying machine in which a scanning mechanism is moved by a scanning distance corresponding to the paper size of the copying machine by a motor driven based on a reference frequency output according to a reduction ratio. , comprising means for calculating a backward movement speed during scanning based on a predetermined copying time according to the paper size, and determining the reference frequency based on the calculated value. Scanning mechanism control device for copying machines.
JP57113706A 1982-06-30 1982-06-30 Control device for scanning mechanism for copying machine Pending JPS595233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57113706A JPS595233A (en) 1982-06-30 1982-06-30 Control device for scanning mechanism for copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57113706A JPS595233A (en) 1982-06-30 1982-06-30 Control device for scanning mechanism for copying machine

Publications (1)

Publication Number Publication Date
JPS595233A true JPS595233A (en) 1984-01-12

Family

ID=14619098

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57113706A Pending JPS595233A (en) 1982-06-30 1982-06-30 Control device for scanning mechanism for copying machine

Country Status (1)

Country Link
JP (1) JPS595233A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60207155A (en) * 1984-03-30 1985-10-18 Mita Ind Co Ltd Copying machine
JPH01232359A (en) * 1988-03-14 1989-09-18 Canon Inc Copying device
JPH0248686A (en) * 1988-08-11 1990-02-19 Mita Ind Co Ltd Movement controller for optical system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60207155A (en) * 1984-03-30 1985-10-18 Mita Ind Co Ltd Copying machine
JPH0452949B2 (en) * 1984-03-30 1992-08-25 Mita Industrial Co Ltd
JPH01232359A (en) * 1988-03-14 1989-09-18 Canon Inc Copying device
JPH0248686A (en) * 1988-08-11 1990-02-19 Mita Ind Co Ltd Movement controller for optical system

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