Abstract
The mathematical model about the weft knitting process is formulated, in which the contact effect between a new loop and an old loop is taken to consider at the case of plain and 1X1 rib knitting. The only unknown value in the computer programs based on this model is the yarn tension (Tf) in the trailing arm of the loop held the needle that got out of the step length of cam. Tf is obtained by the simulated calculation using this program so that the calculated course length agrees with the experimental course length. Then the effects of the depth of stitch draw, the cam angle, the step length of cam, the input tension, and the take-down weight on Tf is described.
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