With the nep sensor NEPCONTROL TC-NCT, Trützschler offers a unique solution for permanent quality control: TC-NCT monitors the card web during production and provides concrete information on quality. In the process, every single metre of card sliver is tested.

A camera takes approx. 20 pictures per second of the web under the take-off roll. In doing so, the camera moves about the whole working width of the card in a special, fully closed profile. This optical principle copies the visual percep­tion of a person, and is thus superior to indirect measuring methods. A high-performance computer directly attached to the profile evaluates the pictures with a special software, distinguish­ing between neps, trash particles and seed coat fragments.
With NEPCONTROL TC-NCT it is also possible to establish a distribution profile of the nep and particle level over the working width. Possible clothing damage becomes immediately visible this way.