An experimental study of ballooning yarn with a control ring

In ring spinning, yarn rotates about the spindle axis to form a yarn balloo n. Balloon-control rings constrain the balloon and reduce the spinning tens ion, allowing a higher speed of operation. In the work reported in this pap er, a specially constructed spinner test rig is used to verify experimental ly a mathematical model of the ring-controlled balloon. The test rig rotate s an adjustable length of yam without imparting twist while measuring the e yelet tension. The three-dimensional balloon shapes are also measured. Plots of eyelet ten sion versus yarn length are produced for a range of yarn air drag, control- ring radii, and control-ring heights. For a small yarn length (narrow ballo ons), the theoretical and experimental results match well. However, several balloon shapes predicted by the theory for a greater yarn length are not e xperimentally observed.