JPH0593966A - Driving device for optical system - Google Patents
Driving device for optical systemInfo
- Publication number
- JPH0593966A JPH0593966A JP25518091A JP25518091A JPH0593966A JP H0593966 A JPH0593966 A JP H0593966A JP 25518091 A JP25518091 A JP 25518091A JP 25518091 A JP25518091 A JP 25518091A JP H0593966 A JPH0593966 A JP H0593966A
- Authority
- JP
- Japan
- Prior art keywords
- driving
- time
- scanning
- optical system
- optical unit
- 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
Landscapes
- Optical Systems Of Projection Type Copiers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、走査光学系を用いた複
写装置等の走査光学系駆動装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scanning optical system driving device such as a copying machine using a scanning optical system.
【０００２】[0002]
【従来の技術】走査光学系を用いた複写装置の代表例と
して、図１及び図２を用いてその構成を説明する。光学
ユニット１７にはワイヤ１５が取り付けられており、ワ
イヤ１５はワイヤドラム１４を介して、サーボモータ１
３で駆動される。サーボモータ１３はＣＰＵ１１とサー
ボドライバ１２によって構成される制御装置により駆動
される。2. Description of the Related Art As a typical example of a copying apparatus using a scanning optical system, its structure will be described with reference to FIGS. A wire 15 is attached to the optical unit 17, and the wire 15 is connected to the servo motor 1 via the wire drum 14.
It is driven by 3. The servo motor 13 is driven by a control device including a CPU 11 and a servo driver 12.
【０００３】上記構成の複写装置において、主として複
写倍率を変更するために、各倍率相当の速度へ光学ユニ
ットの走査速度が変更可能とする機能が一般に備えられ
る。ここで光学ユニットを、上記各走査速度まで加速す
る時、駆動モータへの負荷を小さくするため、低速度か
ら一定の加速時間をかけて走査速度まで加速する方法が
とられる。走査駆動立ち上がり加速時に、光学ユニット
１７、ワイヤ１５等が有する弾性が原因となって、加速
時間後に目標速度にに対して相対的な振動を生じ、速度
のずれ量が生まれる。この振動はやがて減衰、整定する
が整定特性が悪化すると、複写画像の悪化を招く。複写
装置の小型化、高画質化のために、上記整定特性の向上
が必要となる。The copying apparatus having the above-mentioned structure generally has a function of changing the scanning speed of the optical unit to a speed corresponding to each magnification, mainly for changing the copying magnification. Here, in order to reduce the load on the drive motor when accelerating the optical unit to each of the above scanning speeds, a method of accelerating to a scanning speed from a low speed over a certain acceleration time is adopted. At the time of scan drive start-up acceleration, due to the elasticity of the optical unit 17, the wire 15 and the like, vibration is generated relative to the target speed after the acceleration time, and a deviation amount of the speed is generated. This vibration will eventually be attenuated and settled, but if the settling characteristics deteriorate, the copy image will deteriorate. In order to reduce the size of the copying apparatus and improve the image quality, it is necessary to improve the settling characteristics.
【０００４】従来、ＣＰＵ１１内には、光学ユニット駆
動立ち上がり時に、常に参照される駆動速度のタイムテ
ーブルは、加速時の速度勾配曲線を一種類だけ有してお
り、その勾配曲線に従った加速時間を短くとるか、長く
とるかにより異なる速度までの加速を行う。図２は従来
の走査速度変更時のサーボモータ駆動速度の変化を示
す。Conventionally, in the CPU 11, the drive speed time table which is always referred to when the optical unit is driven has only one kind of speed gradient curve at the time of acceleration, and the acceleration time according to the gradient curve. Accelerate to different speeds depending on whether you take short or long. FIG. 2 shows changes in the servo motor drive speed when the conventional scanning speed is changed.
【０００５】この時、加速時間は走査速度に従って変化
する。At this time, the acceleration time changes according to the scanning speed.
【０００６】[0006]
【発明が解決しようとする課題】光学系駆動立ち上がり
時、振動整定特性は加速時間と関連が深く、前記整定特
性を良好にする加速時間が光学ユニット駆動系特有の値
として存在し、加速時間はその値に固定してあることが
望ましい。しかし従来の技術では加速時間が走査速度に
従い、変化するため、加速時間を一定に保つことができ
ないという問題点を有していた。When the optical system is driven, the vibration settling characteristic is closely related to the acceleration time, and the acceleration time for improving the settling characteristic exists as a value peculiar to the optical unit driving system. It is desirable to fix it to that value. However, the conventional technique has a problem that the acceleration time cannot be kept constant because the acceleration time changes according to the scanning speed.
【０００７】[0007]
【課題を解決するための手段】この問題を解決するため
に本発明の駆動方式は、従来の光学系駆動装置に用いら
れているＣＰＵの代わりに、走査速度を変更しても、駆
動立ち上がり加速時間を略一定に保つ制御機能を有する
ＣＰＵを組み入れた構成を有している。In order to solve this problem, the drive system of the present invention uses a CPU used in a conventional optical system drive apparatus to accelerate the drive start even if the scanning speed is changed. It has a configuration incorporating a CPU having a control function of keeping time substantially constant.
【０００８】[0008]
【作用】この構成によって、ＣＰＵが定める加速時間を
倍率に関わらず、立ち上がりの整定特性が良好な値に固
定することによって、光学系駆動立ち上がり整定特性を
良好な状態で安定させ、複写機の高画質化、小型化を実
現することができる。With this configuration, the acceleration time determined by the CPU is fixed to a good value for the rise settling characteristic regardless of the magnification, so that the optical system drive rise settling characteristic can be stabilized in a good state, and the copier performance can be improved. Image quality and miniaturization can be realized.
【０００９】[0009]
【実施例】以下本発明の一実施例について、図面を参照
しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【００１０】図１（ａ）において、１１はＣＰＵ、１２
はサーボドライバ、１３はサーボモータ、１４はワイヤ
ドラム、１５はワイヤ、１６はプーリ、１７は光学ユニ
ット、１８は出力信号、１９はフィードバック信号であ
る。同図（ｂ）は速度一時間特性図を示しており、２１
〜２３は走査速度変更時の速度曲線、ｔは加速時間を示
している。In FIG. 1A, 11 is a CPU, and 12
Is a servo driver, 13 is a servo motor, 14 is a wire drum, 15 is a wire, 16 is a pulley, 17 is an optical unit, 18 is an output signal, and 19 is a feedback signal. The figure (b) shows the speed-one-hour characteristic diagram.
23 to 23 are velocity curves when the scanning velocity is changed, and t is the acceleration time.
【００１１】以上の様に構成された光学系駆動装置につ
いて、図１、図２を用いてその動作を説明する。図２は
従来の駆動装置における走査速度変更時の速度曲線であ
り、ＣＰＵ内の加速時速度駆動テーブルとしてはメモリ
に保存記憶された単一速度勾配曲線をいずれの走査速度
においても参照している。そのため複写倍率変更時、す
なわち走査速度変更時、上記速度曲線の加速時間は増減
する。図１の（ｂ）は本発明における駆動装置による加
速時の速度曲線であり、複写倍率の変更につれ、加速時
間を一定する様に速度勾配をＣＰＵ内で計算を行い、変
更する。このため複写倍率によらず、加速時間を一定に
保つことができ、しかもその加速時間を光学系立ち上が
り振動の整定特性の良い時間に調整しておくことによ
り、振動の整定時間を短くでき、従って複写装置の小型
化、高画質化が可能となる。なお図１において、サーボ
モータを使用しているが、ステッピングモータを使用し
ても良いことはいうまでもない。The operation of the optical system driving device configured as described above will be described with reference to FIGS. 1 and 2. FIG. 2 is a speed curve when the scanning speed is changed in the conventional driving device. As the speed driving table during acceleration in the CPU, a single speed gradient curve stored and stored in the memory is referred to at any scanning speed. . Therefore, when the copy magnification is changed, that is, when the scanning speed is changed, the acceleration time of the speed curve increases or decreases. FIG. 1B is a speed curve during acceleration by the driving device according to the present invention. As the copying magnification is changed, the speed gradient is calculated and changed in the CPU so as to keep the acceleration time constant. Therefore, the acceleration time can be kept constant irrespective of the copy magnification, and the oscillation settling time can be shortened by adjusting the acceleration time to a time with good settling characteristics of the optical system rising vibration, and therefore, The copying machine can be downsized and the image quality can be improved. Although a servo motor is used in FIG. 1, it goes without saying that a stepping motor may be used.
【００１２】[0012]
【発明の効果】本実施例による駆動装置は立ち上がりの
整定特性を向上させ、複写装置の高画質化、小型化の点
で優れた効果が得られる。The driving device according to the present embodiment improves the settling characteristics of the rising edge, and is excellent in terms of high image quality and downsizing of the copying machine.
【図１】（ａ）は本発明の第１の実施例における光学系
駆動装置の構成図 （ｂ）は第１の実施例における複写倍率変更時の光学系
駆動立ち上がり時の速度曲線図FIG. 1A is a configuration diagram of an optical system driving device according to a first embodiment of the present invention, and FIG. 1B is a velocity curve diagram at the time of driving the optical system when changing a copy magnification in the first embodiment.
【図２】従来の光学系駆動立ち上がり装置における複写
倍率変更時の光学系駆動立ち上がり時速度曲線図FIG. 2 is a velocity curve diagram at the time of starting the optical system when changing the copy magnification in the conventional optical system driving start-up device.
１１ ＣＰＵ １２ サーボドライバ １３ サーボモータ １４ ワイヤドラム １５ ワイヤ １６ プーリ １７ 光学ユニット １８ 出力信号 １９ フィードバック信号 ２１、２２、２３ 走査速度変更時速度曲線 ３１、３２、３３ 走査速度変更時速度曲線 11 CPU 12 Servo Driver 13 Servo Motor 14 Wire Drum 15 Wire 16 Pulley 17 Optical Unit 18 Output Signal 19 Feedback Signal 21, 22, 23 Scanning Speed Changing Speed Curve 31, 32, 33 Scanning Speed Changing Speed Curve
Claims (1)
走査駆動立ち上がり時の加速時間を略一定にする駆動用
モータの制御装置を用いて、光学ユニットの駆動立ち上
がり時の振動特性を良好な状態で安定させることを特徴
とする光学系駆動装置。1. A vibrating characteristic at the time of driving start of an optical unit is improved by using a control device of a drive motor which makes an acceleration time at the time of scanning drive start of an optical unit substantially constant for a plurality of scanning speeds. An optical system driving device characterized by being stabilized by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25518091A JPH0593966A (en) | 1991-10-02 | 1991-10-02 | Driving device for optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25518091A JPH0593966A (en) | 1991-10-02 | 1991-10-02 | Driving device for optical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0593966A true JPH0593966A (en) | 1993-04-16 |
Family
ID=17275153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25518091A Pending JPH0593966A (en) | 1991-10-02 | 1991-10-02 | Driving device for optical system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0593966A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6416272B1 (en) | 1998-10-09 | 2002-07-09 | Toyota Shatai Kabushiki Kaisha | Wheelchair with retractable wheels for conversion to vehicle passenger seat |
| US6543848B1 (en) | 1997-09-01 | 2003-04-08 | Toyota Shatai Kabushiki Kaisha | Vehicular turning seat |
| US6557919B2 (en) | 1997-04-03 | 2003-05-06 | Toyota Shatai Kabushiki Kaisha | Rotating vehicle seat |
| US6572172B1 (en) | 1998-09-10 | 2003-06-03 | Toyota Shatai Kabushiki Kaisha | Rotating vehicle seat |
-
1991
- 1991-10-02 JP JP25518091A patent/JPH0593966A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6557919B2 (en) | 1997-04-03 | 2003-05-06 | Toyota Shatai Kabushiki Kaisha | Rotating vehicle seat |
| US6543848B1 (en) | 1997-09-01 | 2003-04-08 | Toyota Shatai Kabushiki Kaisha | Vehicular turning seat |
| US6572172B1 (en) | 1998-09-10 | 2003-06-03 | Toyota Shatai Kabushiki Kaisha | Rotating vehicle seat |
| US6416272B1 (en) | 1998-10-09 | 2002-07-09 | Toyota Shatai Kabushiki Kaisha | Wheelchair with retractable wheels for conversion to vehicle passenger seat |
| US6582181B2 (en) | 1998-10-09 | 2003-06-24 | Toyota Shatai Kabushiki Kaisha | Vehicle seat |
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