Safe measurement, indication and control of rotational speed
Application-Report - Quality control: Printing machines
Task:
On an 8-colour flexographic printing press, there is a web
inspection system whereby several individual frames are
automatically sent to a monitor every second over the entire
width of the material using a mobile camera.
Since these are only snapshots, the operator has to check
the print quality randomly, in addition to manually, while the
machine is running (max. 400m/min).
Source: Clondalkin Flexible Packaging
Examination criteria:
A „positive“ typeface will often be printed in a differently
coloured, recessed „negative“ typeface. The two images
have to be superimposed precisely, so that the base
material, such as white paper, does not show through on
the edges of the font.
The typeface may not fray at the edges
There may not be any printing lapses (the printed image
appears „porous“).
Solution:
Using the RT STROBE 10000 LED stationary stroboscope,
the complete web width can be illuminated effortlessly. As a
result, quality control is performed much more quickly and
effectively.
The extremely high light intensity of the RT STROBE 10000
LED is guaranteed by 480 high-power LEDs. Thanks to a
homogeneous illumination area of up to 100 cm, excellent
results can even be achieved under less than favourable
lighting conditions.
Printing errors which only occur at the edges of the material
web can be recognised immediately at a glance. Without
effort, a person can sometimes even „take a quick look at it
in passing“.
The brightness can be adjusted to the material/printing image
so that reflections can be prevented.
RT STROBE 10000 LED
User panel
RHEINTACHO is a flexible, highly efficient partner- wherever speed must be measured, monitored or indicated. Innovation, the most modern
production techniques and equipment, meticulous quality control along with a first-class workforce are the corner stones of our company. For
the past 114 years, Rheintacho has used his extensive knowledge and experience to developed sensors, systems and customized solution to
meet the customer’s requirements.
RHEINTACHO Messtechnik GmbH · Waltershofener Str. 1 · D - 79111 Freiburg
phone +49 761 4513 0 · fax +49 761 445 274 · www.rheintacho.de