【正文】 ng CNC system39。s. At present, economy of our country type numerical control machine tool needs amounts to be 8000 ~ 10000 platforms about every year. Be also very cheap though having several tens manufacturers to production be prices, the technology develops but slouly for many years, function and fairly have a few problem , unable satisfied reliability aspect marketplace need. the new numerical control product With the development of machinery processing technology, correct numerical control machine tool the function and satisfies these to e to adapt to demanding to need the product developing a few new integration of machinery with electronics numerical control more and more high , urgent demand. By the same token, move for realizing high speed , demand to develop the straight line electric motor , be used in drive working table linear motion directly. Straight line electric motor that the Japan FANUC pany produces, displacement speed can reach 100 m/min. The Japanese THK pany , German INDRAMAT pany , SIEMENS pany are similar to a product all in developing and producing this. To sum up ,development of numerical control technology is that the technology develops need of developing productions synchro , being also basis at the same time but develop with the modern puter art , electron. Now the numerical control technology is already mature , develops with expanding very much more quickly. Future CNC system will may make machinery easier to use , cheaper. ○ 3 Numerical Control of Production Equipment From the scientific and mercial point of view， Digital control technology in the development of bulk processing in the manufacturing sector has a major achievement。s memory. Machine for each part of the cycle is stored in the puter memory from the process control instead of the content of their tapes. Included in the puter control system to some of the procedures introduced into the machine tool operations (or other processing equipment). Some features from the MCU circuit ponents in the hardware implementation. For example, the insertion of recycling often run by the hardware circuit rather than stored procedures. At the same time, hardware interface to the machine tool servo system to match. (3) characteristics of CNC control system In front of the machine control described in the digital control of the characteristics and importance. CNC mon in the rigid procedures microcontroller functions by adding additional features. Some of these include the following: 1) be able to store a number of procedures. With the progress of puter 7 technology, many puter updated digital control system strong enough storage capacity to more single process. Such a change storage capacity to store a large number of procedures or shortor mediumsize procedures. 2) the use of floppy disks. In the largescale manufacturing sector, the process in the floppy disk usage on the rise. Capacity of the previous eight times. Equivalent to the capacity of a floppy disk or close to 8,000 feet long perforated paper. As more modern storage technology, many puter digital control system have a stronger ability to read stored in the floppy disk or perforated paper on the procedure. 3) in the work of editing procedures. Procedures for the revision of some mistakes, CNC system allows the memory to modify procedures table. Therefore, the test procedure and makes machines that can read better than to return to the design room to amend scallops. Apart from the revised procedures, mechanical cutting cycle in the state which can be edited to achieve optimum cycle. Laws and procedures to achieve optimization, scallops perforation and to obtain the edited version of scallops can be connected with the CNC controller. 4) fixed cycle and design procedures. CNC enhanced control over the puter storage capacity and capabilities. That the frequent use of the storage processing cycle procedures can be visited from the list. Instead of a coding process to enter each table in the special directive was written into the schedule refers to the cycle be executed. Some cycles of operation, the need to set specific parameters. For example, a bolt hole, the bolt hole diameter hole in space, and other parameters must be specified. In other cases, special processing parameter definition does not require processing cycle. 5) interpolation. Some interpolation because of the requirements of the programme only in the implementation of a CNC system. To linear and circular interpolation, normally takes to access control unit. Spiral, and the squareshaped parabolic interpolation usually in a preservation program prepared to run. 6) the importance of positioning equipment. For a specific work in the machine settings, including installation and proofreading work table fixture. In order to machine the workpiece spindle and alignment, which must be pleted. Alignment of CNC system software to work its possible options to achieve specific characteristics. Been set by the location, operators need to determine the fixture table deviations. Machine Tool Spindle fixture will be the location for the creation of reference points, or reference plane or in the workpiece fixture on the position. 7) Tool length pensation. This is similar to the aforementioned features, but 8 applicable to the work tool length and diameter. In the old design of the controller, tool size must be fully consistent with the definition of the procedures in the design path. A path to ensure that the tool is designed with the requirements of the CNC controller. One of the ways is in the MCU in the importation of the actual size of the current tool, which may be the size of the initial preparation and the different procedures. Such pensation from the puter automatically calculate and adjust. Another new method is used in the machine to