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JPS55163560A - Return controlling system - Google Patents

Return controlling system

Info

Publication number
JPS55163560A
JPS55163560A JP7174779A JP7174779A JPS55163560A JP S55163560 A JPS55163560 A JP S55163560A JP 7174779 A JP7174779 A JP 7174779A JP 7174779 A JP7174779 A JP 7174779A JP S55163560 A JPS55163560 A JP S55163560A
Authority
JP
Japan
Prior art keywords
motor
reference voltage
return
speed
comparator
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
JP7174779A
Other languages
Japanese (ja)
Inventor
Narimoto Tenmiyo
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 JP7174779A priority Critical patent/JPS55163560A/en
Publication of JPS55163560A publication Critical patent/JPS55163560A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

PURPOSE: To simplify circuit and achieve the reduction of cost by letting returning be done for a fixed time, measuring this displacement extent and applying the brake by the driving force corresponding to this displacement extent in the case of performing return controlling to the home position.
CONSTITUTION: A controller 33 for return outputs the code Iref so as to generate electric current by inputting the return start signal. This code is converted to a reference voltage iref by a current-setting reference voltage generator 34 consisting of a D/A converter and is applied to a motor 25 by way of a comparator 35 and servo-amplifier 36. A speed-detecting resistance 37 is connected in series to the motor 25 and detects the speed of the motor. Its output voltage iFB is compared with the output of the reference voltage generator 34 in a comparator 35 and the differential voltage is input to the servo-amplifier 36, by which the speed control of the motor 25 is accomplished. In this way, the circuits may be simplified and the cost is reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP7174779A 1979-06-07 1979-06-07 Return controlling system Pending JPS55163560A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7174779A JPS55163560A (en) 1979-06-07 1979-06-07 Return controlling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7174779A JPS55163560A (en) 1979-06-07 1979-06-07 Return controlling system

Publications (1)

Publication Number Publication Date
JPS55163560A true JPS55163560A (en) 1980-12-19

Family

ID=13469422

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7174779A Pending JPS55163560A (en) 1979-06-07 1979-06-07 Return controlling system

Country Status (1)

Country Link
JP (1) JPS55163560A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597357A (en) * 1982-07-05 1984-01-14 Minolta Camera Co Ltd Scanner
JPH01222248A (en) * 1988-03-01 1989-09-05 Mita Ind Co Ltd Stopping position adjuster for scanning member
US5119136A (en) * 1988-12-13 1992-06-02 Minolta Camera Kabushiki Kaisha Original scanning apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597357A (en) * 1982-07-05 1984-01-14 Minolta Camera Co Ltd Scanner
JPH0454951B2 (en) * 1982-07-05 1992-09-01 Minolta Camera Kk
JPH01222248A (en) * 1988-03-01 1989-09-05 Mita Ind Co Ltd Stopping position adjuster for scanning member
US5119136A (en) * 1988-12-13 1992-06-02 Minolta Camera Kabushiki Kaisha Original scanning apparatus

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