Improved apparatus and technique for the circular weft knitting of articles including an improved knitting machine control synchronization system for computer control operation using independently operable, modular components. Needle selection for knit, tuck or float operation is effected by a unique presser cam system which flexes the lower end of compound needles outwardly where they are selectively and magnetically held or released according to a prescribed program to enter one or one set of plurality of cam tracks (3120) depending on the intended function of the needle. The upper end of the needles are positively engaged and held at a prescribed position above the fulcrum (3108) during such selection operation. A modified sinker element (2090) and sinker drive system accommodate an increased range of stitch length control and compensate for variations in yarn elasticity. The yarn knitting cylinder is directly driven by a hollow core motor concentrically arranged with respect to the longitudinal axis (1904) of the knitting cylinder. Finally there is provided an improved laser yarn cutting system.
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