JPS56111867A - Optical system driving device in copying machine - Google Patents

Optical system driving device in copying machine

Info

Publication number
JPS56111867A
JPS56111867A JP1533580A JP1533580A JPS56111867A JP S56111867 A JPS56111867 A JP S56111867A JP 1533580 A JP1533580 A JP 1533580A JP 1533580 A JP1533580 A JP 1533580A JP S56111867 A JPS56111867 A JP S56111867A
Authority
JP
Japan
Prior art keywords
amplifier
motor
optical system
signal
rotating speed
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
JP1533580A
Other languages
Japanese (ja)
Inventor
Takehiro Yoshimura
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP1533580A priority Critical patent/JPS56111867A/en
Publication of JPS56111867A publication Critical patent/JPS56111867A/en
Pending legal-status Critical Current

Links

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)

Abstract

PURPOSE:To obtain the moving speed of an optical system in follow up to the rotating speed of a drum-driving motor by applying the signal corresponding to the rotating angular speed including the fluctuating components in the motor for driving the photosensitive drum as a reference signal from a rotating speed detector to a comparing and error signal amplifier. CONSTITUTION:A comparing and error signal amplifier (expressed as amplifier hereunder) EA is constituted of an operational amplifier OA and resistances R, Ra-Rc. The difference in voltage value between the reference signal S applied to the resistance Ra and the comparing signal Sc applied to the resistance Rb is amplified and outputted. The output signal of the amplifier EA is amplified by a power amplifier PA, and is supplied to a motor Mb for driving the optical system, by which the motor Mb is run. A round loop consisting of the amplifier EA, the power amplifier PA, the DC motor Mb and a rotating speed detector TBGb makes control operation in such a direction where the output signal of the amplifier EA is zero, whereby the scanning speed of the optical system is followed up to the rotating speed of the photosensitive drum motor Ma.
JP1533580A 1980-02-11 1980-02-11 Optical system driving device in copying machine Pending JPS56111867A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1533580A JPS56111867A (en) 1980-02-11 1980-02-11 Optical system driving device in copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1533580A JPS56111867A (en) 1980-02-11 1980-02-11 Optical system driving device in copying machine

Publications (1)

Publication Number Publication Date
JPS56111867A true JPS56111867A (en) 1981-09-03

Family

ID=11885906

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1533580A Pending JPS56111867A (en) 1980-02-11 1980-02-11 Optical system driving device in copying machine

Country Status (1)

Country Link
JP (1) JPS56111867A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601568A (en) * 1983-10-26 1986-07-22 Kabushiki Kaisha Toshiba Document-scanning control apparatus for image-forming apparatus
JPS643637A (en) * 1987-06-26 1989-01-09 Ricoh Kk Method for controlling speed of optical system in copying machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4601568A (en) * 1983-10-26 1986-07-22 Kabushiki Kaisha Toshiba Document-scanning control apparatus for image-forming apparatus
JPS643637A (en) * 1987-06-26 1989-01-09 Ricoh Kk Method for controlling speed of optical system in copying machine

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