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Production of better yarns in terms of uniformity is every spinner’s goal since yarns with a large number of irregularities and defects reduces the market value of the end product. This thus study aimed at studying the influence of count, twist, opening roller speed and rotor speed on the number of thin places and thick places formed in 100% cotton rotor spun yarns using statistical techniques. The results obtained in this research work indicated that increase in count increased thin and thick places in the yarns. With twist and opening roller speed, thin and thick places were reduced up to a certain value and then started to increase. Count 15Ne, twit multiplier of 5TM, opening roller speed of 8000rpm and rotor speed of 90,000rpm  gave the lowest number of both thin and thick places/km formed in the resulting yarns.

Influence of Spinning Parameters on thin and thick Places of rotor spun yarns