Because PLC and graph of other controller existence handle troublesome, memory capacity and memory capacity small wait for blemish, so vitreous cut uses PC+ motion finally to dominate calorie of hardware program. Athletic control card is to be based on a PC the pace of all sorts of bus line enters electric machinery or electric machinery of digital type servo go up position control is unit, bus line form also is varied, what use normally is to be based on ISA bus line, of PCI bus line and PC104 bus line. As the development of the PC, advocate board on ISA inserts groove already less and less, and PC104 bus line inserts groove to appear in the skill with high price to accuse only advocate board on, PCI bus line has made the main trend of average PC. CNC Milling