opdi-tex
Multi-thread checker

Mittwoch, 05. Juni 2019 When creating warp beams, when warping or weaving, it often happens that it must be recognized whether a thread is torn, 2, threads are twisted, a thread is flipped, lints are sticking out, slubs and nodes have occurred or there is simply a thread too many or too little.

The challenge for industrial image processing: Carbon filaments, black, glossy, <100 μm
© Photo: opdi-tex
The challenge for industrial image processing: Carbon filaments, black, glossy, <100 μm
The mechanical tools which are standard today are needed 1x per warp beam in production and not only 1x per loom. Also, the mechanical touching and the constant friction on the thread leads to stresses that are rarely desired. In the area of glass and carbon fibers, they are most unwanted as they scratch the fiber or react too quickly due to abrasion.
opdi-tex GmbH, Eresing/Germany, transferred a technology into the fabric which has been used in automotive production for several years. A sensor with 3 measuring heads covers a swarm of wires. Each head is typically responsible for 60-80 cm, capturing the thread in this area with over 4,000 pixels. With its raw resolution of 0.2 mm, it is suitable for almost all types of fabric and threads.
Due to its scalability, it can also be used for resolutions up to a minimum of 0.05 mm.
High-resolution line scanners enable all gloss effects to be removed – even small, protruding fibers <100 μm are recognizable © Foto: opdi-tex
High-resolution line scanners enable all gloss effects to be removed – even small, protruding fibers <100 μm are recognizable

Since the sensor does not touch the thread, it cannot damage it. The technology used is resistant to ambient light, partly even to sunlight. A patented retro-reflection process often dispenses with active backlighting - it is sufficient to stick a special film behind the threads. The film is as robust as a license plate on the car - and thus easy to clean and it is flat - 0.2 mm are enough.

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