Roller Flat ultrasound computerized machine with 3 independent stepper motors controlled by the touch panel for adjusting the speed of the upper (wheel), lower (rotating base) and puller. Possibility to work with the puller raised or in reverse mode. Excellent for sewing chemical fiber fabrics, heat melting fabrics, surgical fabrics, non-woven fabrics and related products that cannot be pierced by a needle, replacing the seam with continuous ultrasonic welding.