Regular twills are those that run in regular order; it is, therefore, simply necessary to know the interlacing of any one end or pick, say the first, of a regular twill in order to show the entire weave on design paper. The interlacings of the first end or pick of any regular twill are conveniently shown by writing numbers above and below a horizontal line; thus, for example,if the first end is up 2 picks, down 3, up 1, and down 2.
The angle of twill weave is determined by the amount of shift in the points of interlacing.A one pick one end shift twill weaveis called 45 degree twill.A twill weave which has more than one pick shift and one end shift is called steep twill; if the shift is more than one end and one pick it is called reclining twill.
The flat knitting machine is a two-bed machine. The most important mechanical features of a flat knitting machine are the supporting frame, the yarn feeding system, a transmission system, a fabric take-down motion, a central programming unit, a needle-bed racking system