Abstract: It is a problem to weave three-dimensional rounded rectangle fabric for general looms. This paper introduces a kind of automatic knitting machine which can solve this difficult. The knitting machine configured with independent yarn let-off Machanism, auto-seeking shedding Machanism and clamping-take-up Machanism. It can effectively weave the rounded portion of the rounded rectangle fabric what ordinary weaving machine can not do. The PLC is the core of the system which control the running state of the loom. PLC also communicate with the touch screen, the loom operating data is display in the form of a dynamicmap, and accept the given parameters to control the implementation of the component to realize the operators and the loom of "man-machine dialogue" function.

Key words: loom, three-dimensional rounded rectangle woven fabric, PLC, touch screen