ABSTRACT
Roving is also distinguished as the first process in which material is wound on a bobbin. Faulty roving preparation has a drastic effect on the spinning performance. The process parameters adopted in the roving process have a significant influence on spinning quality and production. The speed frame machine essentially comprises between 60 and 132 spindles, each containing a drafting system and flyer twister. The rotation of flyer imparts twist to the fibrous strands. Flyer rotational speed is limited because of mechanical design difficulties. The defect arising in the drafting of roving introduces the short-term irregularity in the yarn produced from it. The wrong selection of twist in the roving affects the spinning performance by either higher creel breakages or higher undrafted ends. The improperly built bobbin in roving leads to end breakage in ring frame and higher sloughoff during material handling. The preparation of roving bobbin for the yarn spinning is of paramount importance for a spinning mill.
