UT4_Application Report - Uster Technologies

THE YARN QUALITY ASSURANCE SYSTEMFor the capacitive clearer the combination with Foreign Matter option i.e.either C15/F30 or C20/F30 is required. There is a special setting on theseclearers particularly assigned for the wet spliced applications.3.18 Is it possible to classify foreign fibers?The USTER ® QUANTUM 3 classifies foreign fibers and vegetables in theUSTER ® FOREIGN CLASS matrix. The faults are classified according tothe reflection (%) and length (mm). The system also illustrates the frequencyof foreign fibers and vegetables as dense areas to facilitate easy settings.The system provides numeric classification and the scatter plot of foreignfibers and vegetables including the dense area display.3.19 What are the experience values for cuts in ring spinningmills with foreign fiber clearers?Cuts will depend on the degree of contamination of the raw material andthe quality requirements.With medium degree of contamination of the raw material and nonbleached fabrics end use it could be expected that the foreign fiber cutsrange between 10 to 40 cuts per 100 km. In case of bleached knitted orwoven fabrics FF clearing is more critical and even higher cuts should beexpected.With the new FF clearing concept, The USTER ® QUANTUM 3 ensures thehighest possible quality with the lowest possible cuts. The smart way ofsetting the clearing limits of the yarn clearer will ensure that the most disturbingfibers will always be eliminated first. Closer settings will eliminatefiner and shorter faults.3.20 With the UQC2 one could not compare the classificationof C15 and C20 – how is it now?The USTER ® QUANTUM 3 new capacitive sensor has shorter guardedmeasuring fields (4mm). As a result of the new technology, the classificationof C15 and C20 is comparable.This means the clearing limits can be similar between these clearer typesand the cuts, clearing performance for C15 or C20 is comparable. Userscan now choose the most appropriate iMH type for their application.USTER ® QUANTUM 3 19 (21)