In this work the weft stresses were measured during picking on the following high production weaving machines: Air jet weaving machine, Projectile weaving machine, Rapier weaving machine, The weft stresses were measured during picking on the different types of weaving machines under the effect of the following parameters: - weft insertion rate in (m/min. - modulus of elasticity of Weft threads in (CN/tex). - longitudinal density of weft threads in(g/m). The experimental design methods were used to determine the parameters which have the main effect on the variation in weft tension, by considering the weft insertion rate and the modulus of elasticity of weft threads as a independent variables and the variation in weft tension as a dependent variable. It was found that the values of weft tension are affected by the latter parameters specially the weft insertion rate and modulus of elasticity of weft threads.
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