(1) sliver drafting mechanism is directly fed into the indigo yarn machine, drawing mechanism and jet spinning machine is similar, after drawing beam fiber before roller nip output immediately into a spiral air nozzle and the front roller nip is close to the stable control vortex nozzle, nozzle and moving forward to the end extended to the prominent part of the nozzle.

(2) in high speed rotary spiral vortex in the nozzle of the fiber bundles twisted, twisting yarn has an upward trend, but the nozzle will prevent twist extending upward, the upper part of the fiber front roller nip point separation and maintain a loose state.

(3) yarn twisting body passes through the nozzle end of the fiber due to eddy current effect and expansion, the hollow spindle twist after twist into yarn core, twisting completed. The electronic yarn clearing yarn defects after being wound into the package. Front roller nip has certain influence grip characteristics and spindle blade tip distance on the yarn physical properties, the greater the distance the actual twist yarn to upper loose fibers more close to the design of twist. But waste fiber from the jaw to the spindle blade tip assembly produced more rate. The average length of Murata company recommended frontroller holding point to tip distance should be slightly smaller than the spindle fibers, can make the production in the best condition. Correctly grasp the distance will reduce waste fiber, improve the rate of production.