Air-jet weaving is an advanced weaving method with high efficiency and productivity. It is one of the most widely used methods of weaving in the world. In air-jet filling insertion, the motion of weft yarn is caused by friction between weft yarn and air blown through nozzle. After declamping and subjecting the yarn to air stream, its motion is not active but very complicated and influenced by structural properties of yarn and air stream factors. Researchers have tried to obtain the yarn motion equations in order to analyze and simulate the air-jet weft insertion system. The results could then be used in the optimization of weaving operation and machine design. In the present work, a single-nozzle loom was simulated by obtaining the weft yarn motion equation. The position, the velocity and the weft yarn tension graphs were obtained by numerical soloution of weft yarn motion equation. This analysis provided useful information for controlling the weft yarn tension in air-jet loom.

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