Abstract: The paper introduces the functions, working principles and main technical data of Model FA389 intelligent drawing frame with automatic adjustment of draft ratio. It also analyzes the innovative technical features and key technologies of this machine, including digital setting of total draft ratio (gearless drafting), digital setting of sliver weight at delivery end, wide application of digital sensors for intelligent detection,dual-duct control technique, etc., which provide important reference to getting better grasp the machine and promoting the development of intelligent textile machinery in China.

Key words: automatic adjustment of draft ratio; weight adjustment; intelligent control; digital setting; dualduct technique