Abstract
The results of testing a large number of rotor yam samples for evenness and imper fections by an instrument operating on capacitance principles are compared with like data produced by a yam monitoring system based on optical methods. The yams vary in the cotton used, type, and linear density. While there is a reasonably good correlation between measures of non-uniformity (CV%), correlations between measures of thick places are improved by accounting for yarn type. The yam diameter data from the monitoring system show that the increase in yarn bulk by using a different combination of machine parameters is constant for a range of yam linear densities. In this study, knitting yarns are 12% more bulky than weaving yarns.
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