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JPS57125931A - Driving device for microfilm - Google Patents

Driving device for microfilm

Info

Publication number
JPS57125931A
JPS57125931A JP1230781A JP1230781A JPS57125931A JP S57125931 A JPS57125931 A JP S57125931A JP 1230781 A JP1230781 A JP 1230781A JP 1230781 A JP1230781 A JP 1230781A JP S57125931 A JPS57125931 A JP S57125931A
Authority
JP
Japan
Prior art keywords
resistance
voltage
film
motor
opa1
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.)
Granted
Application number
JP1230781A
Other languages
Japanese (ja)
Other versions
JPH0345368B2 (en
Inventor
Hitoshi Yanagawa
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP1230781A priority Critical patent/JPS57125931A/en
Publication of JPS57125931A publication Critical patent/JPS57125931A/en
Publication of JPH0345368B2 publication Critical patent/JPH0345368B2/ja
Granted 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/10—Projectors with built-in or built-on screen
    • G03B21/11—Projectors with built-in or built-on screen for microfilm reading
    • G03B21/111—Projectors with built-in or built-on screen for microfilm reading of roll films
    • G03B21/113—Handling roll films

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Abstract

PURPOSE:To make winding of a film smooth to the final possible in low speed feed as well by feeding the voltage corresponding to the speed of a film driving motor back to the input side of a control circuit and feeding the voltage from a motor driven by the film movement back to the control circuit. CONSTITUTION:A resistance R31 for detecting generated voltage is connected in series to a short circuit switch S1-2, and the terminal voltage thereof is supplied via a resistance R32 to an operational amplifier OPA3, the output whereof is fed back via a resistance R34 to an operational amplifier OPA1. Namely, the generated voltage of a motor 14 generated at both ends of the resistance R31 is fed back to the OPA1 via the feedback system of the resistance R32, the OPA3 and the resistance R34, and the voltage of a motor 15 per se is fed back to the OPA1 by the feedback system of a resistance R3, a capacitor C1 and a resistance R4. Thereby, a film is wound smoothly at low speeds as well.
JP1230781A 1981-01-30 1981-01-30 Driving device for microfilm Granted JPS57125931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1230781A JPS57125931A (en) 1981-01-30 1981-01-30 Driving device for microfilm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1230781A JPS57125931A (en) 1981-01-30 1981-01-30 Driving device for microfilm

Publications (2)

Publication Number Publication Date
JPS57125931A true JPS57125931A (en) 1982-08-05
JPH0345368B2 JPH0345368B2 (en) 1991-07-10

Family

ID=11801654

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1230781A Granted JPS57125931A (en) 1981-01-30 1981-01-30 Driving device for microfilm

Country Status (1)

Country Link
JP (1) JPS57125931A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6028750U (en) * 1983-08-03 1985-02-26 ミノルタ株式会社 Transport device for rolled microfilm

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6028750U (en) * 1983-08-03 1985-02-26 ミノルタ株式会社 Transport device for rolled microfilm
JPH0244273Y2 (en) * 1983-08-03 1990-11-26

Also Published As

Publication number Publication date
JPH0345368B2 (en) 1991-07-10

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