Method and system for synchronously phase-controlling printing roll driving system for corrugated board printing press
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United States of America Patent
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Nov 23, 1993
Grant Date -
N/A
app pub date -
Mar 19, 1992
filing date -
Jul 20, 1990
priority date (Note) -
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Abstract
The present invention belongs to the technical field of synchronously controlling the phase relationship between a plurality of printing rolls in a corrugated board printing press. The object of this invention is to realize synchronous phase control at low cost and with high precision by software. In this invention, a speed command inputted is converted to a digital value at regular intervals to integrate the digital value, the revolution speed of each of the printing rolls is also integrated, and any deviation between these integrated values is subjected to PI operation, thereby separately correcting the revolution speed commands given to drive motors on the basis of their corresponding results of the PI operation. At this time, when the results of the operation in the course of the integrating the speed command and the individual printing rolls exceed the highest value, their values separately return to 0 to continue the operation.
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