Printing – Inkers – Fountains
Patent
1996-11-25
1998-09-01
Fisher, J. Reed
Printing
Inkers
Fountains
101485, B41F 3105, B41F 724
Patent
active
057995796
ABSTRACT:
A method for positioning actuators inside printing machines is described. In particular, the positioning operations of metering elements, which serve to feed ink, moisture or varnish and interact with a rotating cylinder, are improved. To this end, the metering elements are automatically moved from time to time up to the rotating cylinder and the position resulting in the process is stored as a so-called zero position. The method according to the invention is intended in particular to ensure that the metering element is not set with too high a force relative to the cylinder during future positioning operations. This is done by motion commands being fed to the drive allocated to the metering element so that this drive moves the metering element in two areas, in which the metering element is contiguous to the cylinder and furthermore is in contact with the cylinder. While the position values of the metering element are detected, the corresponding functional relations of the position signals of the metering element are detected as a function of the motion commands of the drive. The zero position value, at which both functions are identical, is stored as the motion command for further positioning operations.
REFERENCES:
patent: 4510426 (1985-04-01), Michaels et al.
patent: 5138944 (1992-08-01), Rancourt et al.
Fisher J. Reed
MAN Roland Druckmaschinen AG
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