645 heads ,flat machine,bridge body low vibration,low noisse,less thread broken speed: 850rpm 6 needles ,45 heads ,flat with trimmer machineorigin dahao 10''LCD computer ,with USB portmain motor : panasonic servo motorx and y : dahao servo motorspeed: 850rpmlinear driveitaly beltbridge bodylow vibrationlow noisseless thread broken 645 flat with trimmer machine