Printing

Printing machines are often located at the end of the production chain

Printing machines are often located at the end of the production chain. It is only logical that
these machines largely define the perception of the end product. Special attention must
therefore be paid to quality in the printing process.

A precise printed image is important in many areas of daily life. Printing machines are used, for
example, to print newspapers, packages and decorations. Today’s newspapers are generally printed
using the offset printing process with at least four primary colors. In the printing of packages
there are even as many as ten or more colors within a single gravure or flexopress machine.

Roller parallelism is essential for achieving the required register precision, and for trouble-free
creasing and wrapping. Especially for measuring machines with very long webs, such as
newspaper web printers and gravure machines, the PARALIGN system from PRUFTECHNIK has
become standard.


Wrapping machines in printing systems can be driven by means of universal joint shafts, in which
case the driving motors frequently are mounted on separate foundations. Due to the mechanical
stress during insertion of web rolls that weigh up to several tons, the wrapping machines change
their position in relation to their drive units over the course of time. Regular checks of the
alignment of the drive trains can prevent wear on the universal joint shafts, therefore also
preventing unplanned downtimes.

In the case of solvent-based printing, the solvents must be recovered from the exhaust air.
Therefore, the alignment of the input and output shafts on the motor-pump machine trains
in the solvent recovery area must regularly be measured and corrected using laser optical
measurement systems.

Applications