Yarn loop density adjustment apparatus for circular knitting machines

A yarn loop density adjustment apparatus for circular knitting machines installed on a circular knitting machine, comprising:

• a saddle seat which is coupled on the circular knitting machine and has a transmission mechanism, a slider driven by the transmission mechanism and a cam fastened to the slider, the transmission mechanism having first teeth, the slider having second teeth corresponding to the first teeth;
• a driving means installed on the saddle seat to drive the transmission mechanism;
• and
• a detection means located on the driving means to detect a driving condition of the driving means;
• wherein the detection means generates a detected signal according to the driving condition of the driving means and inputs to a processing unit which feeds back an adjustment signal based on the detection signal to the driving means to adjust the driving condition thereof.