CNC face milling machine is made up of milling head, elevation column, worktable, bed, mechanical feeding system, electric control system, CNC system, guideway protective device and miller. It is used for two ends of h-beam and box column welding and rolling face milling and processing. The Max. workpiece milling face size is 1200?500mm; min. workpiece face is 300?00mm, also it can mill the side face of H-beam steel and box column. It is convenient operation, simple structure and fast adjustment, which is necessary equipment for profile steel professional manufacturer. The slide feeding and milling head elevation of this machine adopt Guangzhou CNC DA98A drive servo motor. DA98A AC servo system is the first domestic-made all digital AC servo system, adopting American IT company latest digital signal processing (DSP(TMS320F2407A)) large-scale programmable door array (CPLD)and MITSUBISHI intelligent power module (IPM), high integration, small volume, complete protection and good reliability, adopting good PID accumulation to finish PWM control and the performance meeting product's international level.