Pre-register adjustment

Process for the pre-registration in a printing machine (1) with multiple printing units (D1-D4),

• in which the phases of the printing cylinders (F1-F4) involved in the printing process is so mutually attuned that,
• the deviations of the printing images of the various printing cylinders (F1-F4) lie within the mutual capture area of the measuring system,
• which is used in context of the registration during an ongoing printing operation respectively for the determination of the printing images or of the parts of the same,
• characterized in that
• the web (4) to be printed, which is fed to the printing machine (1) in the pre-registration, has at least one marking
• which passes various printing units during the pre-registration
• whereby the time points, at which the marks pass the measuring points in the printing units, are recorded, these time points are set with reference to the angular position of the printing images of the respective printing units (D1-D4) at these time points and
• that based on this comparison, the drives of the printing cylinders (F1-F4) and/or the web path between the printing units are so adjusted
• that the deviations of the printing images of the different printing cylinders (F1-F4) lie mutually within the capture area of the measuring system,
• which are used in context of the registration during an ongoing printing operation respectively for the determination of the printing images or parts of the same.