JPH0377501B2 - - Google Patents
Info
- Publication number
- JPH0377501B2 JPH0377501B2 JP57083811A JP8381182A JPH0377501B2 JP H0377501 B2 JPH0377501 B2 JP H0377501B2 JP 57083811 A JP57083811 A JP 57083811A JP 8381182 A JP8381182 A JP 8381182A JP H0377501 B2 JPH0377501 B2 JP H0377501B2
- Authority
- JP
- Japan
- Prior art keywords
- optical system
- moving optical
- scanner
- detection means
- signal
- 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.)
- Expired - Lifetime
Links
- 230000003287 optical effect Effects 0.000 claims 12
- 238000001514 detection method Methods 0.000 claims 6
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS 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
- G03B27/00—Photographic printing apparatus
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/52—Details
- G03B27/522—Projection optics
- G03B27/525—Projection optics for slit exposure
- G03B27/526—Projection optics for slit exposure in which the projection optics move
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は所定の停止位置に適確に停止させるよ
うにしたスキヤナ駆動制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scanner drive control device that accurately stops a scanner at a predetermined stop position.
従来のスキヤナ駆動制御装置として、例えば、
スキヤナ走行を検出する複数のセンサを設け、該
センサ間を走行する時間からスキヤナの速度を演
算し、演算速度に基いて減速制御することによつ
てスキヤナを所定の停止位置（例えば、ホームポ
ジシヨン）に停止させるようにしたものがある。 As a conventional scanner drive control device, for example,
A plurality of sensors are provided to detect scanner travel, the speed of the scanner is calculated from the time it travels between the sensors, and deceleration control is performed based on the calculated speed to move the scanner to a predetermined stopping position (for example, the home position). ).
このスキヤナ駆動制御装置とは別に、所定の位
置に単一のセンサを設けてスキヤナが該センサを
通過したとき一定の減速をかけるようにしたもの
もあるが、走査距離に応じてセンサ通過速度が異
るためにスキヤナを停止位置に適確に停止させる
ことができないことがあるのに対して、従来のス
キヤナ駆動制御装置にあつては、複数のセンサに
よつてスキヤナの速度を適確に知ることができる
ためスキヤナを所定の停止位置に停止させること
ができる（適確にホームポジシヨンから移動開始
させると所定の助走距離を与えて所定の時間で走
査させることができる）。 Apart from this scanner drive control device, there is also one that has a single sensor at a predetermined position and applies a constant deceleration when the scanner passes the sensor, but the sensor passing speed changes depending on the scanning distance. However, with conventional scanner drive control devices, it is possible to accurately determine the speed of the scanner using multiple sensors. Therefore, the scanner can be stopped at a predetermined stop position (if the scanner is properly started from the home position, it can be scanned over a predetermined run-up distance and in a predetermined time).
しかし、従来のスキヤナ駆動制御装置によれ
ば、スキヤナの速度を知るために複数のセンサを
設けているため、コスト低減に限度があり、故障
発生の確率が大になる恐れがある。 However, according to the conventional scanner drive control device, since a plurality of sensors are provided to know the speed of the scanner, there is a limit to cost reduction, and there is a possibility that the probability of failure occurrence becomes high.
本発明は、上記に鑑みてなされたものであり、
コスト低減を図るとともに故障発生の確率を抑え
ながらスキヤナを所定の停止位置に適確に停止さ
せるため、スキヤナを予め定めた駆動電圧に基く
予め定めた速度に制御した後制動するようにした
スキヤナ駆動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,
A scanner drive system that controls the scanner to a predetermined speed based on a predetermined drive voltage and then brakes in order to accurately stop the scanner at a predetermined stop position while reducing costs and reducing the probability of failure. A control device is provided.
以下本発明によるスキヤナ駆動制御装置を詳細
に説明する。 The scanner drive control device according to the present invention will be explained in detail below.
第１図は本発明の一実施例を示し、モータ１に
よつて駆動され、露光ランプ２、反射ミラー３等
を有するスキヤナ４に位置信号素子B1，B2が設
けられている。位置信号素子B1，B2の通過を検
出するセンサ５と、モータ１の回転数および回転
方向に応じた信号を出力するホトカプラ６が制御
回路７と接続され、該制御回路７は、信号線８を
介して入力する走査距離信号、センサ５の信号、
ホトカプラ６の信号等を処理して位置信号B1，
B2、走査信号Ｓ、リターン信号Ｒを出力する。
該制御回路７とは別に定電圧発生回路９が設けら
れ、信号線１０を介して入力する縮倍率信号等に
応じた定電圧を出力する端子VFとVA＞VB＞VCの
定電圧を出力する端子VA，VB，VCと、スキヤナ
４の駆動方向を制御する論理信号「１」を出力す
る端子Ｄを有している。この端子VF，VA，VB，
VCは対応するスイツチSW1，SW2，SW3，SW4
を介して演算増幅器１１に入力し、また、端子Ｄ
はスイツチSW5、あるいはインバータ１２および
スイツチSW6を介してモータ駆動増幅器１３を制
御する。制御回路７の走査信号Ｓはスイツチ
SW1，SW5を制御し、リターン信号Ｒはスイツチ
SW2，SW6を制御するとともにADN回路１４，
１５を制御し、AND回路１４，１５はリターン
信号Ｒが出力されているとき位置信号B1，B2を
入力して第１の時限T1を計時するタイマ１６と
第２の時限T2を計時するタイマ１７を作動させ
る。タイマ１６，１７の出力はSW5を制御すると
ともにスイツチ回路１８を制御し、更に、タイマ
１６と立ち下りから所定の時間オンしてインバー
タ１９の出力を通すスイツチ回路２０が設けられ
ている。増幅器１３の出力に応じてモータ１が駆
動制御される。尚、第１図中、XIはセンサ５か
らの走査距離を、XPはセンサ５とホームポジシ
ヨンの距離を示し、また、位置信号素子B1，B2
の間隔は距離XPより小さくなるように設定され
ている。また、第１の時限T1は位置信号B1，B2
の間隔Ａおよび第２の時限T2より大であり、更
に、タイマ２０のオン時間は位置信号B1，B2の
間隔Ａから前記時限T1を減じた値より大である。 FIG. 1 shows an embodiment of the present invention, in which a scanner 4 driven by a motor 1 and having an exposure lamp 2, a reflecting mirror 3, etc. is provided with position signal elements B 1 and B 2 . A sensor 5 that detects the passage of position signal elements B 1 and B 2 and a photocoupler 6 that outputs a signal according to the rotation speed and rotation direction of the motor 1 are connected to a control circuit 7, and the control circuit 7 is connected to a signal line scanning distance signal input via 8, signal of sensor 5,
Processing the signals of the photocoupler 6, etc., generates a position signal B 1 ,
B 2 , a scanning signal S, and a return signal R are output.
A constant voltage generation circuit 9 is provided separately from the control circuit 7, and outputs a constant voltage according to the reduction ratio signal inputted via the signal line 10 through terminals V F and V A > V B > V C. It has terminals V A , V B , and V C that output voltages, and a terminal D that outputs a logic signal "1" that controls the driving direction of the scanner 4 . This terminal V F , V A , V B ,
V C is the corresponding switch SW 1 , SW 2 , SW 3 , SW 4
is input to the operational amplifier 11 via the terminal D.
controls the motor drive amplifier 13 via the switch SW 5 or the inverter 12 and the switch SW 6 . The scanning signal S of the control circuit 7 is a switch.
SW 1 and SW 5 are controlled, and the return signal R is a switch.
In addition to controlling SW 2 and SW 6 , the ADN circuit 14,
15, AND circuits 14 and 15 input position signals B 1 and B 2 when the return signal R is output, and operate a timer 16 that clocks the first time period T 1 and a second time period T 2. The timer 17 for measuring time is activated. The outputs of the timers 16 and 17 control the SW 5 and a switch circuit 18. Furthermore, a switch circuit 20 is provided which is turned on for a predetermined period of time from the falling edge of the timer 16 and passes the output of the inverter 19. The motor 1 is driven and controlled according to the output of the amplifier 13. In FIG. 1, X I indicates the scanning distance from the sensor 5, X P indicates the distance between the sensor 5 and the home position, and position signal elements B 1 and B 2
The interval is set to be smaller than the distance X P. Moreover, the first time period T 1 is the position signal B 1 , B 2
Furthermore, the on-time of the timer 20 is greater than the interval A between the position signals B 1 and B 2 minus the time limit T 1 .
以上の構成において、第２図のタイムチヤート
によつてその操作を説明するに、スキヤナ４が走
査中は制御回路７の端子Ｓから走査信号が出力さ
れるためスイツチSW1およびSW5がオンして定電
圧発生回路９の定電圧VFが演算増幅器１１およ
びモータ駆動増幅器１３を介して出力されてモー
タ１を駆動する。制御回路７はスキヤナ４の走査
距離が所定の値に達したことを信号線８から入力
したとき端子Ｒからリターン信号を出力し、スイ
ツチSW2およびSW6をオンして定電圧発生回路９
の定電圧VAをインバータ１２の出力によつてモ
ータ駆動増幅器１３を介して反転して出力する。
それによつてモータ１は逆転し、スキヤナ４をリ
ターンさせる。スキヤナ４がリターンしていると
き位置信号素子B1がセンサ５に達すると位置信
号B1（速度制御開始信号）が制御回路７から出力
される。位置信号B1によつてAND回路１４が
AND信号を出力すると（時限t1）タイマ１６が
第１の時限T1オンしてスイツチSW2およびSW5
をオンする（スイツチ回路１８がオフになる）。
この時限T1にわたつて走査方向の電圧VAが加え
られるためモータ１の回転速度はN1→N1′（ある
いはN2→N2′）に減速させられる。タイマ１６が
オフになると（時限t2）スイツチ回路１８がオン
し、またスイツチ回路２０が設定時限だけオンす
るためスイツチ回路SW3およびSW6がオンし、定
電圧発生回路９のリターン方向の定電圧VBによ
つて定まる飽和速度NCまで増速する。次に位置
信号素子B2がセンサ５に達すると（時限t3）位置
信号B2（制動開始信号）が出力され、AND回路
１５がAND信号を出力してタイマ１７が第２の
時限T2にわたつてオンする。このオンによつて
スイツチSW4およびSW5がオンし（スイツチ回路
１８はオフ）、モータ１は走査方向の定電圧VCに
よつて減速されて停止する。以上の実施例のよう
に、回転速度差（N1，N2）があつても定電圧VB
による飽和速度に制御した後停止させるため所定
の位置に停止させることができる。 In the above configuration, the operation will be explained using the time chart shown in FIG. 2. When the scanner 4 is scanning, the scanning signal is output from the terminal S of the control circuit 7, so the switches SW 1 and SW 5 are turned on. The constant voltage V F of the constant voltage generating circuit 9 is outputted via the operational amplifier 11 and the motor drive amplifier 13 to drive the motor 1 . When the control circuit 7 receives an input from the signal line 8 indicating that the scanning distance of the scanner 4 has reached a predetermined value, it outputs a return signal from the terminal R, turns on switches SW 2 and SW 6 , and turns on the constant voltage generation circuit 9.
The constant voltage V A is inverted by the output of the inverter 12 via the motor drive amplifier 13 and output.
As a result, the motor 1 rotates in the reverse direction, causing the scanner 4 to return. When the position signal element B 1 reaches the sensor 5 while the scanner 4 is returning, a position signal B 1 (speed control start signal) is output from the control circuit 7. AND circuit 14 is activated by position signal B1 .
When the AND signal is output (time period t 1 ), the timer 16 turns on the first time period T 1 and switches SW 2 and SW 5 are turned on.
is turned on (switch circuit 18 is turned off).
Since the voltage V A in the scanning direction is applied over this time period T 1 , the rotational speed of the motor 1 is reduced from N 1 to N 1 ′ (or from N 2 to N 2 ′). When the timer 16 is turned off (time limit t 2 ), the switch circuit 18 is turned on, and the switch circuit 20 is turned on for the set time, so the switch circuits SW 3 and SW 6 are turned on, and the return direction of the constant voltage generation circuit 9 is determined. The speed is increased to the saturation speed N C determined by the voltage V B. Next, when the position signal element B2 reaches the sensor 5 (time limit t3 ), the position signal B2 (braking start signal) is output, the AND circuit 15 outputs an AND signal, and the timer 17 starts the second time limit T2 . Turn on for a period of time. This turns on switches SW 4 and SW 5 (switch circuit 18 is off), and motor 1 is decelerated by constant voltage V C in the scanning direction and stopped. As in the above embodiment, even if there is a rotational speed difference (N 1 , N 2 ), the constant voltage V B
It is possible to stop the motor at a predetermined position after controlling it to the saturation speed.
以上説明した通り、本発明によるスキヤナ駆動
制御装置によれば、スキヤナを予め定めた駆動電
圧に基く予め定めた速度に制御した後、制動する
ようにしたため、コスト低減を図るとともに故障
の確率を抑えながらスキヤナを走査距離に依存す
ることなく所定の位置に停止させることができ
る。 As explained above, according to the scanner drive control device according to the present invention, the scanner is controlled to a predetermined speed based on a predetermined drive voltage and then braked, which reduces costs and reduces the probability of failure. However, the scanner can be stopped at a predetermined position without depending on the scanning distance.
第１図は本発明の一実施例を示す説明図。第２
図は本発明の一実施例のタイムチヤート。
符号の説明、１モータ、２……ランプ、３……
反射ミラー、４……スキヤナ、５……センサ、６
……ホトカプラ、７……制御回路、９……定電圧
発生回路、１６，１７……タイマ、１８，２０…
…スイツチ回路。
FIG. 1 is an explanatory diagram showing one embodiment of the present invention. Second
The figure is a time chart of one embodiment of the present invention. Explanation of symbols, 1 motor, 2... lamp, 3...
Reflection mirror, 4...Scanner, 5...Sensor, 6
...Photocoupler, 7...Control circuit, 9...Constant voltage generation circuit, 16,17...Timer, 18,20...
...Switch circuit.
Claims (1)
電圧を可変することにより前記移動光学系を駆動
制御する移動光学系の駆動制御装置において、 前記移動光学系の復動時、前記移動光学系の位
置を検出して速度制御開始信号を出力する第１の
検出手段と、 前記第１の検出手段よりもホームポジシヨン側
に設けられ、前記移動光学系の復動時、前記移動
光学系の位置を検出して制動開始信号を出力する
第２の検出手段と、 前記第１の検出手段が出力した速度制御開始信
号によつて、前記移動光学系における往動方向駆
動用の所定の駆動電圧を一定時間印加し、その
後、前記移動光学系における復帰方向駆動用の所
定の駆動電圧を印加し、その後、前記第２の検出
手段が出力した制動開始信号によつて、前記移動
光学系における復帰方向駆動用の駆動電圧の印加
を中止し、その後、前記移動光学系における往動
方向駆動用の所定の駆動電圧を一定時間印加する
制御手段と を有したことを特徴とする移動光学系の駆動制御
装置。[Scope of Claims] 1. In a drive control device for a moving optical system that controls drive of the moving optical system by varying the drive voltage of a motor that drives the moving optical system of a copying machine, when the moving optical system is in a backward motion. , a first detection means for detecting the position of the moving optical system and outputting a speed control start signal; and a first detection means provided closer to the home position than the first detection means, when the moving optical system returns; a second detection means for detecting the position of the moving optical system and outputting a braking start signal; and a speed control start signal outputted by the first detection means for driving the moving optical system in the forward direction. A predetermined driving voltage is applied for a certain period of time, and then a predetermined driving voltage for driving the moving optical system in the return direction is applied, and then, the braking start signal outputted by the second detection means is used to control the A control means for stopping application of a driving voltage for driving the moving optical system in the return direction and then applying a predetermined driving voltage for driving the moving optical system in the forward direction for a certain period of time. Drive control device for moving optical system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8381182A JPS58200224A (en) | 1982-05-18 | 1982-05-18 | Controller for scanner driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8381182A JPS58200224A (en) | 1982-05-18 | 1982-05-18 | Controller for scanner driving |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58200224A JPS58200224A (en) | 1983-11-21 |
| JPH0377501B2 true JPH0377501B2 (en) | 1991-12-10 |
Family
ID=13813048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8381182A Granted JPS58200224A (en) | 1982-05-18 | 1982-05-18 | Controller for scanner driving |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58200224A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56125985A (en) * | 1980-03-08 | 1981-10-02 | Ricoh Co Ltd | Motor decelerating control system for driving scanner |
| JPS572053A (en) * | 1980-06-06 | 1982-01-07 | Ricoh Co Ltd | Running body driving device of copying machine |
| JPS5759487A (en) * | 1981-07-08 | 1982-04-09 | Hitachi Ltd | Controlling device for imverter |
-
1982
- 1982-05-18 JP JP8381182A patent/JPS58200224A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56125985A (en) * | 1980-03-08 | 1981-10-02 | Ricoh Co Ltd | Motor decelerating control system for driving scanner |
| JPS572053A (en) * | 1980-06-06 | 1982-01-07 | Ricoh Co Ltd | Running body driving device of copying machine |
| JPS5759487A (en) * | 1981-07-08 | 1982-04-09 | Hitachi Ltd | Controlling device for imverter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58200224A (en) | 1983-11-21 |
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