Title:
【発明の名称】グラビア増幅器の較正方法
Document Type and Number:
Japanese Patent JP2002537138
Kind Code:
A
Abstract:
In a method for calibrating an engraving amplifier in an electronic engraving machine, whereby a vibration signal is used to control the engraving of an engraving element by using engraving tone values representing desired tone values ranging from "light" to "dark", small cup shapes are engraved. The dimensions of the cup shapes define the real tone values. Transmission functions are initially determined, reproducing correlations between signal values that are adjusted in the engraving amplifier and the resulting changes in the real dimensions of the cup shapes. Sample cup shapes are engraved for predetermined desired tone values using the adjusted signal values for at least one of the parameters such as "vibration", "light", "dark" or "mid tone". Differential values are obtained from real measured dimensions and the predetermined desired dimensions of the sample cup shapes, taking into account the transmission functions, whereby the differential values are used to correct the adjusted signal values. Operations are repeated using the corrected signal values until the real dimensions of the engraved cup shapes correspond to at least a permissible variation of the desired dimensions.
Inventors:
Ernst-Rudolph Gottfried Weitrich
Application Number:
JP2000540003A
Publication Date:
November 05, 2002
Filing Date:
January 15, 1999
Export Citation:
Assignee:
Heidelberger Druckmaschinen AG
International Classes:
B41C1/045; H04N1/407; (IPC1-7): B41C1/045
Attorney, Agent or Firm:
Toshio Yano (4 outside)