Protechna @ ITMA 2023: Automatic detection of...
Protechna @ ITMA 2023

Automatic detection of yarn defects

Cogastop Creel 2 3210 yarn monitoring system (Source: Protechna)
Cogastop Creel 2 3210 yarn monitoring system (Source: Protechna)

The supplier of thread and fabric control systems Protechna Herbst GmbH & Co. KG, Ottobrun/Germany, offers the Cogastop Creel 2 3210 yarn monitoring system, that is used for the automatic detection of yarn defects affecting spun and filament yarns during the warping and beaming process. Slubs, double threads, knots and spinning defects can be detected. Monitoring is performed directly on the creel at all levels on the creel outfeed. To facilitate this, the inspection heads with beds for yarn guidance are attached to a special mounting frame or, where possible, on the creel itself. The number of yarn guidance beds in the system matches the number of creel levels. With electronics fully integrated into the inspection heads plus an active optical system, the system set-up is robust and resistant to failure.
Thanks to the use of active transmitter and receiver units, the inspection heads with beds for yarn guidance are easy to adjust and facilitate infinite and automatic sensitivity adjustment to match different yarn diameters. The multi-colored status display integrated into the side of the inspection head keeps operators updated on the current system status even when standing some distance away near to the warping drum. This gives operators an easy way to identify yarn guidance beds with anomalous signal levels. The creel level where a slub has been detected can be identified immediately. A machine stop can be configured based on the size and frequency of defects.
Operating parameters for the Cogastop Creel 2 3210 are entered directly at a central control unit. The integrated display features an intuitive and multilingual menu system. The number of slubs detected is displayed on the control unit both as a total and as separate figures for each yarn guidance bed.

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