%0 Journal Article %T Theoretical Modeling for Predicting the Optimum Twist Angle of Cotton Fiber Movement on OE Yarn Made by Rotor Spinning Machine %A Valentinus Galih Vidia Putra %A M. Farchani Rosyid %J Journal of Applied Mathematics and Physics %P 623-630 %@ 2327-4379 %D 2015 %I Scientific Research Publishing %R 10.4236/jamp.2015.35074 %X This paper presents theoretical modeling for predicting the optimum twist angle on yarn made by open end rotor spinning machine in textile industry. Fiber movement on yarn can be used for predicting the optimum twist angle which can be used to reduce yarn breaking in spinning process. In this research the twist angle has been found and the result of this research shows the twist angle around 45กใ; and the theoretical result of the ratio of rotor diameter to fiber length is \"\". %K Twist Angle %K Open End Spinning %K Yarn Movement %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=56791