JPS5831348A - Copying machine - Google Patents
Copying machineInfo
- Publication number
- JPS5831348A JPS5831348A JP56131117A JP13111781A JPS5831348A JP S5831348 A JPS5831348 A JP S5831348A JP 56131117 A JP56131117 A JP 56131117A JP 13111781 A JP13111781 A JP 13111781A JP S5831348 A JPS5831348 A JP S5831348A
- Authority
- JP
- Japan
- Prior art keywords
- speed
- drum
- motor
- signal
- circuit
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/28—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning
- G03G15/30—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning in which projection is formed on a drum
- G03G15/305—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning in which projection is formed on a drum with special means to synchronize the scanning optic to the operation of other parts of the machine, e.g. photoreceptor, copy paper
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、光学ユニット及びドラムユニットを個別のモ
ータで駆動する複写機におけるモータの速度制御に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to motor speed control in a copying machine in which an optical unit and a drum unit are driven by separate motors.
従来、複写機における光学ユニットとドラムユニットは
、チェーン−又はタイミングベルト等で連結されてドラ
ムの周速度と光学の走査スピードの同期化がなされてい
た。その結果、複写機本体の機構部分が大きくなり１機
器の形状の大型化−駆動時の機構部分からの騒音等が問
題であった。Conventionally, an optical unit and a drum unit in a copying machine have been connected by a chain or a timing belt to synchronize the circumferential speed of the drum and the scanning speed of the optical system. As a result, the mechanical parts of the main body of the copying machine became large, resulting in an increase in the size of the device and problems such as noise from the mechanical parts during operation.
いる。この方式では、ドラムの回転速度、光学の走査ス
ピードは１個々のモータの回転速度で決まるので、個々
のモータの速度制御をフェーズ・ロック・ループ（以下
ＰＬＬという）制御で同期化する方法が用いられている
。従がって１個々のモータにそれぞれのＰＬＬ回路を用
いたモータ速度制御回路が必要であった。There is. In this method, the rotational speed of the drum and the optical scanning speed are determined by the rotational speed of each individual motor, so a method is used in which the speed control of each motor is synchronized using phase-locked loop (hereinafter referred to as PLL) control. It is being Therefore, each motor required a motor speed control circuit using a PLL circuit.
第１図は従来の複写機にかけるＰＬＬ回路を用いたモー
タ速度制御回路を示すもので、光学部ユニット１を駆動
する光学部ユニット駆動モータ２及びドラムユニット３
を駆動するドラムユニット駆動モータ４は、周波数発電
機、タコゼネレータ等の速度検出器（図示せず）により
速度検出され。FIG. 1 shows a motor speed control circuit using a PLL circuit for a conventional copying machine, including an optical unit drive motor 2 that drives an optical unit 1 and a drum unit 3.
The speed of the drum unit drive motor 4 that drives the drum unit is detected by a speed detector (not shown) such as a frequency generator or a tacho generator.
その検出信号はＰＬＬ回路５゜６へ各々導かれて３７・
基準信号発生器子からの基準信号と一位相比較されその
位相比較出力信号はモータ駆動回路８．９に導かれ、モ
ータ駆動回路８，９からの出力によシ光学部ユニット駆
動モータ２及びドラムユニット駆動モータ４を所定の回
転数に制御する。The detection signals are respectively led to PLL circuits 5.6 and compared in phase with the reference signal from the reference signal generator element 37.The phase comparison output signal is led to the motor drive circuit 8.9 and the motor drive circuit 8. , 9 controls the optical unit drive motor 2 and the drum unit drive motor 4 to a predetermined rotation speed.
ＰＬＬ制御により同期化されている限り、モータ２．４
の速度は一致し、ドラムの回転速度も光学の走査スピー
ドの同期化は実現されている。しか工
し、８都構成においてはそれぞれのモータに専用のＰＬ
Ｌ回路等が必要であり１回路構成が複雑で高価となるも
のであった。Motor 2.4 as long as it is synchronized by PLL control
The rotational speed of the drum and the scanning speed of the optical system are synchronized. However, in the 8-way configuration, each motor has a dedicated PL.
Since L circuits and the like are required, the configuration of one circuit is complicated and expensive.
本発明は上述の欠点に鑑みなされたもので、ドラムの回
転速度を検出するドラム速度検出装置を設け、このドラ
ム速度検出装置からの信号を基準信号とし、光学部ユニ
ット駆動モータからの速度信号を入力信号とするＰＬＬ
回路を設け、このＰＬＬ回路の出力信号でもって光学部
ユニット駆動モータの速度制御を行ないドラムの回転速
度と光学の走査スピードの同期化を達成したもので、ド
ラムユニット駆動モータのＰＬＬ制御を不要としだもの
である。The present invention has been made in view of the above-mentioned drawbacks, and is provided with a drum speed detection device that detects the rotational speed of the drum.The signal from the drum speed detection device is used as a reference signal, and the speed signal from the optical unit drive motor is used as a reference signal. PLL as input signal
A circuit is provided, and the output signal of this PLL circuit is used to control the speed of the optical unit drive motor, achieving synchronization of the drum rotation speed and optical scanning speed, eliminating the need for PLL control of the drum unit drive motor. It is something.
以下、本発明を第２図を参照して説明する。図において
、１１はドラムユニット１２を駆動するドラムユニット
駆動モータで、電源条件、負荷条件等で決定される速度
で回転する。１３はドラムの回転速度を検出するドラム
速度検出装置、１４はドラム速度検出装置１３からの速
度信号ｆｏを基準信号とし、光学部ユニット１６を駆動
する光学部ユニット駆動モータ１６からの速度信号ｆ１
（速度検出器にて検出）を入力信号とするＰＬＬ回路で
、ｆｏとｆｌとの信号の位相差を出力信号として出力し
、駆動回路１７を駆動して光学部ユニット駆動モータ１
６の回転速度を制御する。The present invention will be explained below with reference to FIG. In the figure, reference numeral 11 denotes a drum unit drive motor that drives a drum unit 12, which rotates at a speed determined by power supply conditions, load conditions, etc. 13 is a drum speed detection device that detects the rotational speed of the drum; 14 is a speed signal f1 from an optical unit drive motor 16 that drives the optical unit 16, using the speed signal fo from the drum speed detection device 13 as a reference signal;
(detected by a speed detector) as an input signal, outputs the phase difference between the signals fo and fl as an output signal, drives the drive circuit 17, and drives the optical unit drive motor 1.
Control the rotation speed of 6.
以上の如く本発明は、光学部ユニット駆動モータはドラ
ム速度検出装置からの速度信号に同期して回転するため
、ドラムの回転速度と光学の走査スピードは同期化され
、従来のＰＬＬ方式の制御と比較して基準信号源、ドラ
ムユニット駆動モー５ ｌ’−
タの速度制御回路が不要となり、複写機のモータ駆動回
路の簡略化、小型化及びコスト低減を図ることができる
。As described above, in the present invention, since the optical unit drive motor rotates in synchronization with the speed signal from the drum speed detection device, the rotational speed of the drum and the scanning speed of the optical system are synchronized. In comparison, there is no need for a reference signal source and a speed control circuit for the drum unit drive motor 5 l'-, making it possible to simplify, downsize, and reduce the cost of the motor drive circuit of the copying machine.
第１図は従来の複写機におけるモータ駆動回路のブロッ
ク図、第２図は本発明にがかるモータ駆動回路のブロク
図である。
１１・・・・・・ドラムユニット駆動モータ、１２・・
・・・ドラムユニット、１３・・・・・・ドラム速度検
出装置、１４−・・・・・フェーズ・ロック・ループ回
路（ＰＬＬ回路）、１６・・・・・・光学部ユニット、
１６・・・・・・光学部ユニット駆動モータ％１７・・
・・・駆動回路。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図FIG. 1 is a block diagram of a motor drive circuit in a conventional copying machine, and FIG. 2 is a block diagram of a motor drive circuit according to the present invention. 11...Drum unit drive motor, 12...
...Drum unit, 13...Drum speed detection device, 14-...Phase lock loop circuit (PLL circuit), 16...Optical unit,
16...Optical unit drive motor%17...
...Drive circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure
Claims (1)
ドラムユニットを駆動するドラムユニット駆動モータと
、ドラムの回転速度を検出するドラム速度検出装置と、
前記ドラム速度検出装置からの速度信号を基準信号とし
、前記光学部ユニット駆動するモータからの速度信号を
入力信号とするフェーズ・ロック・ループ回路と、前記
フェーズ・ロック・ループ回路の出力で前記光学部ユニ
ット駆動モータの速度制御を行なう駆動回路からなる複
写機。an optical unit drive motor that drives the optical unit;
a drum unit drive motor that drives the drum unit; a drum speed detection device that detects the rotational speed of the drum;
a phase-locked loop circuit that uses the speed signal from the drum speed detection device as a reference signal and the speed signal from the motor that drives the optical unit as an input signal; A copying machine consisting of a drive circuit that controls the speed of a unit drive motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56131117A JPS5831348A (en) | 1981-08-20 | 1981-08-20 | Copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56131117A JPS5831348A (en) | 1981-08-20 | 1981-08-20 | Copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5831348A true JPS5831348A (en) | 1983-02-24 |
Family
ID=15050377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56131117A Pending JPS5831348A (en) | 1981-08-20 | 1981-08-20 | Copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5831348A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6091342A (en) * | 1983-10-26 | 1985-05-22 | Toshiba Corp | Original scan controller of image forming device |
| JPS61261754A (en) * | 1985-05-16 | 1986-11-19 | Shinko Electric Co Ltd | Image forming device |
| WO2000077572A1 (en) * | 1999-06-10 | 2000-12-21 | Sony Corporation | Method and apparatus for image projection, and apparatus for controlling image projection |
-
1981
- 1981-08-20 JP JP56131117A patent/JPS5831348A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6091342A (en) * | 1983-10-26 | 1985-05-22 | Toshiba Corp | Original scan controller of image forming device |
| JPS61261754A (en) * | 1985-05-16 | 1986-11-19 | Shinko Electric Co Ltd | Image forming device |
| WO2000077572A1 (en) * | 1999-06-10 | 2000-12-21 | Sony Corporation | Method and apparatus for image projection, and apparatus for controlling image projection |
| US6554431B1 (en) | 1999-06-10 | 2003-04-29 | Sony Corporation | Method and apparatus for image projection, and apparatus controlling image projection |
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