... control system with stepping motor(servo)feeding, photoelectric tracking, automatically punching, rush corner,zip, article welding ... motor transducer, ultrasonic welding etc.2. Bag making speed: flat bag30-100pcs/m, 3 side box ... whole machine adopts ultrasonic welding technology in high performance. The welding part is in little ... the bag Multi-functional high speed Nonwoven Fabric Bag Making Machine