Ring spinning is a yarn formation process that includes drafting, twisting, spinning and winding steps in which fibers are twisted around each other and rapidly rotated around the central axis of the spindle. The collective actions of the twisting, spinning and winding steps produce the coupled transverse and axial motion of the fiber strands. Therefore, yarn formation is a nonhomogeneous process with mutually coupled kinematics and dynamics, which make it difficult to predict the tension of yarn in ring spinning. In this work, we implemented force and displacement sensors in the ring-spinning frame. By solving coupled physicalmathematical equations with the measured parameters, we obtained the real-time dynamics of yarn tension. The results of this study offer insight into the mechanics of yarn formation and failure in ring spinning.
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