Such machinery have various special machine types. They can carry out multifunctional tasks by being equipped with different accessories to adapt to the demands from different ornament sewing. The improved differential regulating mechanism and the synchronous regulation of the main feeding and the differential feeding can realize the independent regulation of the stitch length and the differential ratio. They are user-friendly. The newest design of the foot-lifting mechanism is more handy and flexible. After the thread releasing, the thread tensioner can recover the original state stably. The main shaft has adopted the high-precision imported bearings, so that such machinery feature a high rotary speed, low torque and durability. The internal structures of the machine are simple and easy for the maintenance and debugging.
