【正文】 refers with digital, the writing and the mark position digital mand realizes one or the multiTaiwan mechanical device movement control controls usually is the position, the angle, the speed and so on the mechanical quantity and flows to the related switch quantity with the mechanical numerical control production relies on data carrier and the binary mode data operation 1908, perforation sheet metal exchange type data carrier being published。 19 century39。 In 1938, Shannon has carried on the data fast operation and the transmission in the American Massachusetts Institute of Technology, has established the modern puter, including puter numerical control system numerical control technology is develops with the engine bed control close 1952, first numerical control engine bed being published, became in the world mechanical industry history an epochmaking event, impelled the automated development. Because uses the puter substitution originally to use the numerical control installment which the hardware logic circuit poses, causes the datain the storage, processing, the operation, the logical judgment and so on each kind of control function realization, may plete through the puter software. The numerical control engine bed is one kind of technical denseness and the automaticity very high integration of machinery processing equipment, is synthesizes the application puter, the automatic control, the automatic detection and precise…The processing precision is high, the quality easy to guarantee, t he prospects for development are extremely broad, therefore the grasping numerical control lathe processing programming technology especially is important. Now, the numerical control technology also is called the puter numerical control technology, at present it is uses the puter realization digital process control the kind of technology according to the control procedure which stores beforehand carries out with the puter to the equipment the control function. ○ 2 Machine tool numerical control system 2 1 .Applies PC resource broadly The microputer the personal puter (PC) is called in recent years develops very quickly , the largescale integrated circuit makes the technology high speed sending out speed , feasible PC hardware structure poses very small. Host CPU operation speed is more and more high. The IPC386 basic frequency is 33 MHz , IPC486 , 58639。s turn to demonstrate a coordinate axis only, each axes handling person being able to use the sway a handle or electronic hand wheel to the machine tool carry out manual operation , are put into use going to the lavatory extremely. 4 .Raises numerical control system product plete set Numerical control system includes the CNC device , the chief axis and feeds the servo driving device, and as well as the chief axis electric motor, feeds an electric motor than pertinent detecting couples back a ponent. A numerical control system function goodness and badness is that the function is closely related to as said or narrated above each links. For the need satisfying the machine tool consumer factory, the numerical control equipment childbirth factory takes numerical control product plete set seriously all very much , makes each systematic links can mate very good , makes a consumer gain best effect. 5. Research and development intelligence type numerical control system Socalled intelligence type numerical control system , morning are in the eighties initial stage already begin to study. FS15 series that the FANUC pany debuted at that time, will be called AI (artificial intelligence) CNC system , be been to have adopt the expert system in the field of malfunction diagnose mainly. System makes use of socalled reasoning software , analyses and seeks malfunction cause according to the experience storing in knowledge base in system. The nearest FANUC pany goes to in the childbirth system being carried out quilt being called problem IMS (Intelligent Manufacturing Systems) being oriented toward the 21st century , will be technology of world range experienced worker key (Know how) bination be carried out seamlessly (Seamless). Subsequently industrial technology desire for development, fabrication process quicker, easier, use fit in with give birth to a child need, one kind be called intelligence closed cycle treating (Intelligent ClosedLoop Processes ICLP) technology adopt. This technology is to make use of a sensor to gain timely information, to strengthen a maker getting the best product ability. Pursue 1 it is intelligence closed cycle to process a model.] 6 .Needs the numerical control product good for sale , develops according to the marketplace The high and new technology is a direction that numerical control system 4 develops , the product developing numerical control good for sale on the other hand is also to adapt to the need that the marketplace develops. Our country is the developing country , economy type numerical control system has the vast marketplace in our country. The cheap numerical control system therefore, developing high performance , price, satisfies our country marketplace needing to be a highly significant39。 It promotion and expansion of the NC technologies, including： Direct Digital Control Computer numerical control Direct Digital Control 5 Direct digital control can be defined as many machines directly connected to the puter by realtime monitoring of the puter manufacturing system. DNC scallops readers were ignored, thereby increasing the reliability of the system. Part of the procedure to replace tapes from the puter memory card reader was sent to work directly in the machine. All in all, a puter can be controlled at least 100 or more different machines. (A mercial DNC system in 1970 that has been controlled during the 256 workstations capacity). DNC puter