The demand for fancy effects with air-textured yarn (ATY) is increasing, so SSM Scharer Schweiter Mettler AG, Horgen/Switzerland, has been working to offer yarn manufacturers more possibilities in this field. The result is a whole family of devices for producing fancy yarns with specific effects. SSM has refined and expanded the capability of the slub device. It can now handle 2 different yarns e.g. different colors resulting in an ATY showing successive slubs of 2 different colors or sizes. Proper dispatching of the slubs in the woven fabric is critical because this plays an integral role in the final visual effect. If the distance between slubs does not vary enough, an unwanted pattern on the woven or knitted fabric will result. To solve this problem, the cycle time of SSM slub device constantly and automatically changes by an adjustable random factor of up to 100%. To give yarn manufacturers full control of slub distribution, SSM created the so-called "pattern mode." It allows users to control the distance variation by editing a sequence of up to 40 steps, or so up to 40 consecutive slubs, that will repeat in a loop, allowing full control of the final fabric design. The pattern mode also gives greater flexibility when processing 2 colors of slubs because the user can choose which color to use for each of the 40 steps.
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