Title:
CONTROL SYSTEM FOR MOTOR
Document Type and Number:
Japanese Patent JPS5947986
Kind Code:
A
Abstract:
PURPOSE:To enable to allow a motor to arrive accurately at a stopping point by converting the prescribed digital value into an analog value to drive the motor before entering the analog control zone after a position error becomes zero. CONSTITUTION:The type instruction signal of a keyboard 1 is supplied to a CPU2, the position instruction data from the reference position on a type wheel 3 is decoded and set in a latch 4. The wheel 3 is driven by a motor 5, and a photoencoder 6 detects the outputs A-C in response to the rotation of the wheel 3. The outputs A-C are supplied through comparators 7-9 to a pulse generator 10 and an addition/subtraction counter 11. An addition/subtraction unit 17 obtains an error value for driving the motor 5, and converts it into an analog signal which has the polarity by supplying it through an OR gate 37 to a D/A converter 18. A constant generator 36 which is controlled by a CPU2 is connected to the gate 37, the prescribed value is outputted, thereby driving the motor 5 toward the prescribed stopping point.
Inventors:
WATANABE YUUICHI
YAMADA YASUAKI
YAMADA YASUAKI
Application Number:
JP15836882A
Publication Date:
March 17, 1984
Filing Date:
September 10, 1982
Export Citation:
Assignee:
CANON KK
International Classes:
H02P5/00; H02P29/00; (IPC1-7): H02P5/00
Attorney, Agent or Firm:
Marushima Giichi