JPS56134824A - Timing pulse generator - Google Patents
Timing pulse generatorInfo
- 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
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.
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)
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 |
-
1980
- 1980-03-24 JP JP3730480A patent/JPS56134824A/en active Pending
Cited By (1)
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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