Abstract
The mathematical model of weft knitting process is formulated on the assumptions led from the knowledges obtained from the analysis of the knitting tension which was made in the previous reports. This model can be used to analyse the yarn motion in the knitting zone and the variation of yarn tension during knitting.
The results obtained by this model are:
(1) The upper the needle ascends from the step line of the stitch cam, the oftener the robbing back occurs. The lower the yarn tension is, the nearer to the feeding side the robbing back occurs.
(2) The shorter the length of the cam step is, the lower the knitting tension and the flatter the shape of the tension distribution is.
(3) To lower the knitting tension and decrease the tension variation, the cam track has to be so designed that the step of a stitch cam is short in length and that the motion of needles which left the step is controlled positively.
