JPS5771016A - Motor control cilrcuit - Google Patents

Motor control cilrcuit

Info

Publication number
JPS5771016A
JPS5771016A JP14648680A JP14648680A JPS5771016A JP S5771016 A JPS5771016 A JP S5771016A JP 14648680 A JP14648680 A JP 14648680A JP 14648680 A JP14648680 A JP 14648680A JP S5771016 A JPS5771016 A JP S5771016A
Authority
JP
Japan
Prior art keywords
motor
trs
turn
pulses
feed
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
JP14648680A
Other languages
Japanese (ja)
Inventor
Susumu Iguchi
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 JP14648680A priority Critical patent/JPS5771016A/en
Publication of JPS5771016A publication Critical patent/JPS5771016A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/20—Control of position or direction using feedback using a digital comparing device

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Position Or Direction (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

PURPOSE:To prevent electric power from being consumed when necessary operation ends even with a power switch closed by applying an electric generation brake to a motor once the operation of the motor ends and by stopping power feed to a motor control circuit on the braking operation. CONSTITUTION:In the automatic focusing AF mechanism of a camera device, a power switch SW1, mode SWs 2 and 3 are turned on successively, a transistor TRQ1 turns on to feed electricity to a block AF, and a voltage is developed at the terminal PW of an IC2 to turn on a TRQ8, thereby maintaining power feed to the AF. In this state, when AF operation is performed and the number of pulses from contacts A2 and B2 for distance measurement is stored in the IC2, a voltage is developed at a terminal M2 to turn on TRs Q2-Q4, and consequently a motor M is turned normally to move a lens, thereay applying pulses from the contacts A1 and B1 to the IC2. When the number of the pulses becomes coincident with the stored number of pulses, the voltages at the terminals PW and M2 disappear and a voltage is developed at a terminal M2 to turn off the TRs Q2-Q4 while turning off TRs Q5-Q5, thereby stopping the motor by applying an electric generation brake. Further, TRs Q5 and Q1 turn off to stop electricity feed to the AF.
JP14648680A 1980-10-20 1980-10-20 Motor control cilrcuit Pending JPS5771016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14648680A JPS5771016A (en) 1980-10-20 1980-10-20 Motor control cilrcuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14648680A JPS5771016A (en) 1980-10-20 1980-10-20 Motor control cilrcuit

Publications (1)

Publication Number Publication Date
JPS5771016A true JPS5771016A (en) 1982-05-01

Family

ID=15408714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14648680A Pending JPS5771016A (en) 1980-10-20 1980-10-20 Motor control cilrcuit

Country Status (1)

Country Link
JP (1) JPS5771016A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01286788A (en) * 1988-05-10 1989-11-17 Canon Inc Automatic focusing motor control driver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01286788A (en) * 1988-05-10 1989-11-17 Canon Inc Automatic focusing motor control driver

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