| 摘要 |
A copying machine control system employs a synchronous motor driven synchronously with an AC supply voltage to transport a surface on which an image is formed. At least one stepping motor is employed discontinuously to transport an original containing material to be copied at a speed which produces an image moving at the same speed as the surface where the image is formed. A stepping motor controller programs an acceleration profile for the stepping motor to permit it to be accelerated to running speed in a precisely defined manner so that the position of the original is always accurately known. The stepping motor controller derives its control pulses from the same AC voltage which drives the synchronous motor and thus, the original and the image surface are accurately driven in synchronism. A transport speed of the original is in inverse proportion to the imaging ratio. In one embodiment, a second stepping motor is driven with a signal derived from the same AC voltage with a precisely determined acceleration profile for aiding in the initial positioning of the original at the start of each copying cycle.
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