Predicting Ends Down From Small Lot Spinning Tests1

Abstract

The Poisson frequency function was used to translate the end breakage rate of 35 and 75, 1000 spindles hr, into a series of critical values which would be used to judge spinning performance in small lot spinning tests for various numbers of spindles used. The critical values for various numbers of spindles used were determined graphically from the cumulative frequency of Poisson distribution. A graph of these critical values for various numbers of spindles for the two levels of end-breakage has been constructed for a rapid evaluation of spinning performance.