JPS54138448A - Copy-timing device - Google Patents
Copy-timing deviceInfo
- Publication number
- JPS54138448A JPS54138448A JP4639278A JP4639278A JPS54138448A JP S54138448 A JPS54138448 A JP S54138448A JP 4639278 A JP4639278 A JP 4639278A JP 4639278 A JP4639278 A JP 4639278A JP S54138448 A JPS54138448 A JP S54138448A
- Authority
- JP
- Japan
- Prior art keywords
- potentiometer
- photosensitive drum
- differential amplifier
- output signal
- output
- 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
Landscapes
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To simplify the mechanism by using rotation angle detection sensor for detection of position of photosensitive drum, and to obtain good copy timing by speeding up the control action of copy sequence by constituting the control system with electronic circuit. CONSTITUTION:A potentiometer 11, which is used as rotation angle detection sensor, is directly coupled to a photosensitive drum 1, and the output signal V of the potentiometer is held in a hold circuit 12. The output signal of the hold circuit 12 and the output signal V of the potentiometer 11 are differentially amplified in a differential amplifier 13. The output of the differential amplifier 13 and the timing setting signal V2 are differentially amplified in a differential amplifier 14, of which output is inputted into a pulse generator 15. By detecting the change in the angle of rotation in the potentiometer 11, operation may be started immediately irrespective of the rotating position of the photosensitive drum 1, so that sufficient aptitude to high speed operation may be guaranteed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4639278A JPS54138448A (en) | 1978-04-19 | 1978-04-19 | Copy-timing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4639278A JPS54138448A (en) | 1978-04-19 | 1978-04-19 | Copy-timing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54138448A true JPS54138448A (en) | 1979-10-26 |
Family
ID=12745865
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4639278A Pending JPS54138448A (en) | 1978-04-19 | 1978-04-19 | Copy-timing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54138448A (en) |
-
1978
- 1978-04-19 JP JP4639278A patent/JPS54138448A/en active Pending
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