Copying machine control apparatus

G - Physics – 03 – G

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G03G 15/00 (2006.01) G03G 15/01 (2006.01) G03G 15/04 (2006.01) G03G 15/22 (2006.01) G03G 15/30 (2006.01)

Patent

CA 1325237

ABSTRACT OF THE DISCLOSURE A copying machine control apparatus which includes a first control means for actuating a first driving means which operates a photoconductive drum, a second control means for actuating a second driving means which operates a scanning means, and a third control means for actuating a third driving means which operates a transfer drum. Each of first, second, and third control means has a position controller and a speed controller, respectively, operated by a common reference pulse train, in which the position controller generates a position control signal to indicate the turning position difference at any moment, and the speed controller generates a speed control signal which is composed of a frequency difference between the common reference pulse train and the pulse train outputted from respective pulse encoders, then this speed control signal is added to the position control signal to generate a driving signal which actuates each of first, second, and third driving means, respectively. Thus, the first, second, and third driving means are harmoniously operated by the common reference pulse train. In the case where each of the first and third driving means is constructed by an outer-rotor type electric motor, each of the photoconductive and transfer drums is rotated by the outer rotor of the electric motor.

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