Tesfaye, Tamirat (PhD)Setegne, Chalachew2018-07-032023-11-182018-07-032023-11-182014-10http://etd.aau.edu.et/handle/12345678/5976Micro and Small Scale Enterprises (MSE’s) are widely implementing and developing in all sectors in Ethiopia. When we see one of the major sectors in which MSE’s are involved is in textile sector and when we observe the commonly used cotton spinning machines used by weavers organized in MSE’s and in home to home is made of wood. It only spines on one takeup shaft from a supply of cotton and consumes large amount of man-work hours to get so many spun yarn. But, cotton spinning is the main operation in the production of clothes by micro and small scale owners. Therefore, it is important to improve the spinning system that can be operated by small and middle scale industry level. Understanding this reality, this thesis focuses on designing cotton spinning machine. In this thesis, theoretical background and development of spinning is discussed; different characteristics of yarn are studied and spinning systems with their economic ranges are explained. On the product planning stage, different mechanisms and components are compared and selected properly. Based on the selection a spinning machine that can spin cotton in to yarn similar to hand spun yarn is designed. The machine will be operated by motor; spools are feed to the machine manually.enMechanical Design StreamThesis