The influence of rotor diameter on separation between two successive belts, belt length, and belt nature were studied. It was concluded that when rotor diameter increases, both length of belt and belt separation increase, and the tightness of their coiling round the yarn core decreases. The study of statistical distributions of the considered parameters—belt separation, number of belts in a given length, and belt length—shows that the phenomenon follows the Gumbel law in the first case, the Poisson law in the second case, and the lognornal law in the third case.
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