Erhardt+Leimer @ Techtextil: New metal detect...
Erhardt+Leimer @ Techtextil

New metal detector for smallest particles

Seam sensor SI 1001 (Source: Erhardt+Leimer)
Seam sensor SI 1001 (Source: Erhardt+Leimer)

The Erhardt+Leimer GmbH, Stadtbergen/Germany, is specialized in automation and inspection technology, and will present systems for web guiding and spreading, web tension measurement and control, as well as cutting units for technical textiles at the Techtextil in Frankfurt/Germany. In addition to these devices for the simple, robust and reliable automation of production processes in the textile industry, the company will be exhibiting a new metal detector – a further development of earlier systems, which can now detect even smaller metal particles in the fabric. Furthermore, a new seam sensor for the detection of cross-seams will be presented.
During the production of textiles, small metal particles find their way into the web due to the various processing steps. If these particles are not all detected, extremely costly damage may occur on the downstream machine parts, e.g. calender rollers. As a result, whole web sections are often converted into scrap. The metal detector Elmeta MDA 1005 / 1006 reliably and accurately detects the smallest metal particles over the entire width of the web. Per segment (300 mm) a signal LED on the sensor indicates the position of the metal particle in the web. The metal detector can be used for dry and damp web textiles and nonwovens. Its function is assured at production speeds from 2-500 m/min.
The seam sensor marketed with the identifier SI 1001 detects, optically and therefore without contact, any type of seam on printed or single-color fabrics. New software algorithms make it possible for the first time to acquire cross-seams at the level of human perception. Along with a light transmitter and a matrix camera with lens, the sensor also includes a WLAN card for reliable communication with a smartphone, tablet or any other mobile terminal device. A dedicated app is also available using which, for instance, special seams can be tested offline. If a cross-seam is detected, a digital output in the sensor is switched so that, depending on the machine, for example the calender rollers can be opened or the seam left to run through the digital printing press without printing. The seam sensor can also be used to calculate the running meters per batch.

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