Importance

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Abstract

The invention relates to a method and a circuit for processing signals in an electronic graving machine, in which a series of cups arranged in a gravure screen is engraved in a printing cylinder by a burin of a graving element guided by an engraving control signal (G). In a digital signal processor (13), a transfer function is determined from function value data used to calculate a periodic screen signal for producing the gravure screen; from adjustment data for adjusting the depth of cut; from digital adjustment parameters for calibrating 'light' (white) and 'dark' (black); and from control data (SD). The transmission coefficients of the transmission function and/or the transmission function can be modified by the control data (SD). The engraving data (GD), which represent the different tone values between 'black' and 'white' which are to be engraved, are then converted into engraving control data (GSD) in the digital signal processor (13) after the transmission function. The engraving control data (GSD) undergo digital-analog conversion and the analog engraving control signal (G) is amplified in a current amplifier (16) and fed to the graving element.

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First Claim