Setting value reporting process for calibrating electronic engraving machine for engraving intaglio printing forms

摘要

The reporting process involves engraving specimens for preset intended tone values and measuring their geometrical parameters. Setting values are deduced from a comparison of the parameters of the intended and actual tone values and are used to calibrate the engraving control signal. The boundary conditions relevant for the test engraving are detected by making a further test engraving. Coefficients for reporting the setting values are calculated, the previous setting values are corrected and a final test engraving is made to check the calibration.