JPS56134824A - Timing pulse generator - Google Patents

Timing pulse generator

Info

Publication number
JPS56134824A
JPS56134824A JP3730480A JP3730480A JPS56134824A JP S56134824 A JPS56134824 A JP S56134824A JP 3730480 A JP3730480 A JP 3730480A JP 3730480 A JP3730480 A JP 3730480A JP S56134824 A JPS56134824 A JP S56134824A
Authority
JP
Japan
Prior art keywords
drum
rotation
pulses
reverse rotation
encoder
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
JP3730480A
Other languages
Japanese (ja)
Inventor
Tsutomu Sato
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 JP3730480A priority Critical patent/JPS56134824A/en
Publication of JPS56134824A publication Critical patent/JPS56134824A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses

Landscapes

  • Controlling Sheets Or Webs (AREA)

Abstract

PURPOSE:To eliminate the influence of drum reverse rotation in the control of paper set to the drum, by outputting pulses during normal rotation of the drum and by counting pulses during reverse rotation and by outputting pulses after counting pulses corresponding to the count value when the drum is changed from reverse rotation to normal rotation. CONSTITUTION:An encoder which can discriminate the drum rotation direction is connected to drum shaft 1a of the copying machine or the like where the paper is wound around the drum and is held automatically. This encoder consists of transparent rotary plate 20a provided with light shield paint at equal intervals of a fixed pitch, transparent plate 20b having slits 21(21A-21C), light emitting diodes PEDs (PED-A-C), and photodiodes PDs(PD-A-C). Rotation direction detecting circuit 30 generates a signal indicating the rotation direction on a basis of output pulses Asig and Bsig of the encoder, and pulse output control circuit 40 outputs timing pulses corresponding to normal rotation obtained by counting and cancelling pulses corresponding to reverse rotation on a basis of the said signal, and thus, positional slippage is not generated in the count value.
JP3730480A 1980-03-24 1980-03-24 Timing pulse generator Pending JPS56134824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3730480A JPS56134824A (en) 1980-03-24 1980-03-24 Timing pulse generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3730480A JPS56134824A (en) 1980-03-24 1980-03-24 Timing pulse generator

Publications (1)

Publication Number Publication Date
JPS56134824A true JPS56134824A (en) 1981-10-21

Family

ID=12493957

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3730480A Pending JPS56134824A (en) 1980-03-24 1980-03-24 Timing pulse generator

Country Status (1)

Country Link
JP (1) JPS56134824A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1498785B1 (en) * 2003-07-18 2015-12-09 Ricoh Company, Ltd. Image forming apparatus with a speed control of a belt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1498785B1 (en) * 2003-07-18 2015-12-09 Ricoh Company, Ltd. Image forming apparatus with a speed control of a belt

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