Precise printed mark detection for packaging machines

The Task

In packaging machines, products are packaged using printed foil. To ensure that the foil can be cut exactly to the required size, a sensor must reliably detect the designated printed mark and trigger the cutting process with precision.

The Challenge

Packaging machines work at very high process speeds. The cutting process must therefore be very precisely timed. Deviations of just a few microseconds can lead to unclean cuts, material waste and therefore downtime. Consequently, the sensor used must operate very quickly and reproducibly – regardless of the printing ink, foil material or ambient light.

Our Solution

Contrast sensors such as the DTECT^® Presence FT 25-RGB detect printed marks with a switching frequency of up to 25,000 Hz and a response time of just 20 microseconds. Thanks to the highly dynamic signal evaluation, the sensor detects the printed mark at exactly the right position and transmits the signal to the machine control system without delay. This enables precise and repeatable cutting results to be achieved even at the highest speeds.

Your Advantages

Very fast detection of printed marks for precise cutting
High process reliability even at maximum machine speeds
Reliable contrast detection thanks to our RGB technology
Compact design for easy integration into packaging machines

DTECT® Presence Energetic: Contrast sensors for easy printed mark detection

Contrast sensors detect the smallest differences in color and gray values on surfaces and are particularly suitable for applications in which simple printed marks, labels, and tags must be evaluated. Depending on the sensor type, different light sources are used: either monochrome LEDs (e.g. red, green or blue) or white light with a broad light spectrum.

FT 25-W: White light contrast sensor for precision printed mark detection

The compact FT 25-W contrast sensor reliably detects even the finest contrast differences. Thanks to its precise light spot and high switching frequency, it enables exact positioning even in fast processes.

FT 25-RGB: Multicolor contrast sensor for minimal contrast differences

The FT 25-RGB automatically selects the optimal transmission color for the object (red, green or blue) during the teach-in process. This enables stable detection of even the smallest contrast differences – including at high process speeds.

Detection of printed marks with contrast sensors

Titelbild

The Task

The Challenge

Our Solution

Your Advantages

DTECT® Presence Energetic: Contrast sensors for easy printed mark detection

FT 25-W: White light contrast sensor for precision printed mark detection

FT 25-RGB: Multicolor contrast sensor for minimal contrast differences

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