Determination on Slub Length for Slubby Yarn of Ring Bobbin

High-precision slub yarn can be produced by EJM128K type ring bobbin equipped with servo control system which has the characteristic of stability ,precision and rapidity to control slub length by analyzing the transfer function of it. The length of slub yarns was tested with USTER® TESTER5, and the distribution curve of slub length and slub space can be attained. The gauge of between front and middle roller affects slub length deflection. This result can control effectively slub length and produce high-class slub yarn.