Abstract
The needle bar is lifted up and lowered down for the purpose of loop formation. In order to feed the yarn to the needle for loop formation as well as to connect the adjacent wales, the guides of a guide bar are required to execute a compound lapping movement. This compound lapping movement is composed of two separately derived motions – swinging and shogging. There are three possible arrangements of lapping at successive courses which may be used alone or in combination. The ultimate pattern or structure of the fabric depends on the nature of movements of the guides. So control of nature of movements of the guides is very much important. The controlling mechanisms like pattern wheel, pattern chain links and electronic jacquard are generally used in warp knitting machines for imparting necessary motions to the guides.
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