Features: 1.dual side,dual layer. 2.with a digital controling system for frequency conversion and speed adjustment 3.with an AC servo system 4.with a tensility controller for arc belts and fine turnings to keep stable yarn speed. 5.spindles with take-up capability suitable for high quality yarns for 2-for-1 twister. 6.To wind different semi-finished yarns into double -cone bobbin yarns 7.Equipped with nozzle to finish blended yarns. 8.Specifications: a)Spindle amount: 500-1000 (16 spindles per section) b)Spindle pitch:230 mm c)Max spindle speed:3800rpm d)Max winding speed:660 m/min e)Roll bobbin dimensions:42*92*150mm f)twist direction:S/Z g)x roll package diameter:110 mm h)ax roll package capacity :1.2kg i)motor power:0.55kw.3kw