... -compatible with spare parts, easy adjust and repair.3.Auto oil circulation system, auto oil feeding detection.4.Double motor design, adapt to ... , motor start-stop, warp-stop, yarn-stop display. Output calculation, auto-return after stop.Machine Model 8/27 6/42 4 ... ,300-1,500 rpm 1,300-1,500 rpm 1,200-1,300 rpm Weft Density 2.9 -40.5cm 2 ...