Knitting Parameter
Stitch tension exerted on a yarn loop as it is drawn through a previously formed stitch during the clearing phase of a knitting cycle defines a key mechanical setting. This parameter, known as knock over tension, determines the size and stability of the knit stitches.
Stitch Formation
Loop formation requires the needle to pull the yarn down past the sinker or stitch cam to complete the loop. An optimal knock over tension ensures that the old loop is cast off cleanly from the needle head without snagging. If this setting is too loose, the fabric will exhibit uneven stitches and a loose, floppy structure.
Conversely, excessive tightness causes the needle to cut the yarn or create tight, distorted stitches that reduce the elasticity of the finished knit fabric.
Yarn Strain
High mechanical stress is placed on the yarn during the stitch-clearing process. If the strain exceeds the tensile limit of the strand, yarn breaks will occur, causing holes in the fabric and forcing machine shutdowns. Controlling this strain is essential when working with delicate or low-strength yarns.
Fabric Quality
Consistent stitch density across the fabric width is maintained by calibrating the needle action. Proper adjustment of the settings prevents fabric defects and ensures uniform weight.