Effect of Machine Speed on Yarn Input Tension and \'On-Machine\' Course Length for a Circular Weft Knitting Machine with Positive Storage Feeding

The effect of machine speed on yarn input tension a d course length has been observed at two different loop sinking depths through cam settings for an industri al single jersey circular weft knitting machine prod ucing plain jersey fabric with spun polyester yarns. Linear regression analyses representing the relationship between the m ntioned variables were evaluated. Yarn input tension and cou rse length were found to vary positively with machine speed resulting a r-square value of more than o.9. A rise in dynamic coefficient of friction also supported t he finding. It was also observed that the estimated change in course l ength for unit change in yarn input tension remaine d almost same though tension values might differ significantly at different cam settings.