JPS57173866A - Driving method of magnetic brush developing device - Google Patents

Driving method of magnetic brush developing device

Info

Publication number
JPS57173866A
JPS57173866A JP56058466A JP5846681A JPS57173866A JP S57173866 A JPS57173866 A JP S57173866A JP 56058466 A JP56058466 A JP 56058466A JP 5846681 A JP5846681 A JP 5846681A JP S57173866 A JPS57173866 A JP S57173866A
Authority
JP
Japan
Prior art keywords
motor
comparator
voltage
speed
inputted
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
JP56058466A
Other languages
Japanese (ja)
Other versions
JPH024907B2 (en
Inventor
Teruo Mineshima
Eiji Otake
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP56058466A priority Critical patent/JPS57173866A/en
Publication of JPS57173866A publication Critical patent/JPS57173866A/en
Publication of JPH024907B2 publication Critical patent/JPH024907B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To prevent occurrence of uneven development when development has started, by preliminarily rotating a developing sleeve at a low speed charging a developer preliminarily, before the development is started. CONSTITUTION:In a driving circuit of a motor M of a magnetic brush developing device, a speed of rotation of the motor M is decided by a thryistor T for controlling a conduction angle of voltage applied to the motor M. That is to say, the gate of the thryistor T is controlled by an output of a gate controlling circuit G, an output signal of a comparator C is inputted to this controlling circuit G, driving voltage es and present rotation speed voltage ef of the motor M from a feeding-back circuit FB are inputted to the comparator C, these deviation voltage (es-ef) is outputted from the comparator C, and the motor M is rotated at a prescribed rotation speed under the speed governor by this deviation voltage. Also, the motor M is stopped when the driving voltage es inputted to the comparator C is on a zero level, is rotated at a low speed when it is on an L level, and is rotated at a prescribed rotation speed when it is on an H level.
JP56058466A 1981-04-20 1981-04-20 Driving method of magnetic brush developing device Granted JPS57173866A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56058466A JPS57173866A (en) 1981-04-20 1981-04-20 Driving method of magnetic brush developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56058466A JPS57173866A (en) 1981-04-20 1981-04-20 Driving method of magnetic brush developing device

Publications (2)

Publication Number Publication Date
JPS57173866A true JPS57173866A (en) 1982-10-26
JPH024907B2 JPH024907B2 (en) 1990-01-30

Family

ID=13085201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56058466A Granted JPS57173866A (en) 1981-04-20 1981-04-20 Driving method of magnetic brush developing device

Country Status (1)

Country Link
JP (1) JPS57173866A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS634554U (en) * 1986-06-26 1988-01-13

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS634554U (en) * 1986-06-26 1988-01-13

Also Published As

Publication number Publication date
JPH024907B2 (en) 1990-01-30

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