Synchronous control of rotary presses

A control system is disclosed for a rotary press comprising a plurality of printing mechanisms in which driving means (M) rotate N turns while plate cylinders (P) rotate one turn, so that printing images can be printed on a paper web (W) sequentially passing through each printing mechanism. A contro...

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Bibliographic Details
Main Authors KAWAMORI, HIDEO, TSUNASHIMA, MAKOTO
Format Patent
LanguageEnglish
French
German
Published 07.11.2001
Edition7
Subjects
CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS
CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
PRINTING MACHINES OR PRESSES
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:A control system is disclosed for a rotary press comprising a plurality of printing mechanisms in which driving means (M) rotate N turns while plate cylinders (P) rotate one turn, so that printing images can be printed on a paper web (W) sequentially passing through each printing mechanism. A control section replaces the rotational phase of the plate cylinder with the rotational phase of the driving means (M) corresponding to that rotational phase so as to match the printing images with a predetermined reference, converts a shift between the rotational phase of the driving means (M) for matching and the rotational phase of the driving means (M) in a normal state into the number of outputs of the first pulse signals, sets it as a correction value, and obtains a virtual feedback value by shifting the rotational phase of the driving means (M) by the amount of the correction value. Control is accomplished by synchronizing the driving reference phase with the virtual feedback phase of the driving means (M).
Bibliography:Application Number: EP20010303912