Investigation of Yarn Tension Dynamics During Unwinding from a Beam

Abstract

In some textile machinery, e. g., sizing and beaming machine, a sheet of yarns is unwound from a beam. Since the beam revolves against forces due to braking and moment of inertia of a beam, the dynamic tension is applied onto yarns. The dynamic tension fluctuates according to the damped oscilation behaviour. The fluctuation of the yarn tension is described by asecond-order differential equation with constant coefficients using some approximations.
This paper deals with the dynamic yarn tension during unwinding from a beam popular in Japan. The result will contribute to the improvement of the operation method for aloom.