163Synchronization and positioning - overviewSynchronization and positioningSynchronization and positioning - overviewDefinition■ Synchronization is the alignment of a complete printing system that consists ofat least two printing systems connected in succession. It ensures that the front andback pages to be printed are properly aligned during the print job.■ Positioning means that the print image is in the right place on each page.Synchronization of printing systems into a complete printing systemConfigurations should be made in the 'Configuration' -> 'Printing system' ->'Operating mode' menu when operating more than one printing system as onecomplete printing system.[79][80]Further information:■ Synchronization - Page integrity marks (PIM) for perforated paper on page 164■ Synchronization - Barcode synchronization mark for unperforated paper onpage 166Initial synchronizationAfter the configuration is complete, the initial synchronization is carried out auto-matically. This prints a synchronization mark on one or more of the set page(s) forthe print image to be created. The synchronization mark is used to properly alignthe front and back pages.Synchronization monitoringThe continual synchronization is monitored during the print job using the follow-ing methods:■ Electronic monitoring of page assignment The ID numbers for the print job'srespective pages are continually checked by the software.■ Optical monitoring of page assignment This mode optically monitors the prop-er assignment of the print pages using the synchronization marks printed on thepaper. It checks that the front and back pages belonging together have the samesynchronization marks. In this case, you should distinguish between pinfeedpaper (paper with guide holes or perforated) or pinless paper (paper withoutguide holes or unperforated).
