One. Project setting 2001, production value of our country machine tool industry already entered the world the 5th, machine tool expenditure rises in world rank the 3rd, because foreign capital is in China the part that mechanical proprietor of an enterprise wants to assume production workshop, technical origin basically relies on its parent company, and originally with respect to actual strength finite inside endowment the company competes in wide-open market backbone holds proper motion to develop development to will risk very big risk, to save investment, improve the image of the product, inside majority endowment enterprise general as far as possible with foreign cooperate, the technology that uses international person of the same trade has production. Because foreign enterprise will not wish to transfer a technology, be willing to pass more in China hold by them pilot company comes with inside endowment the order of user of China of rigid business contention, domestic user also had more advantage to purchase foreign capital product, the main product that is in growing initial stage partly thereby is own of the industry breed it is more difficult to expand. In this kind austere form falls, we need anger of beard and hair pursues strong, development goes those who fit our country national condition to have the numerical control system of own intellectual property. The article is with Guangzhou numerical control and rich achieve cooperative project to be setting, try hard indefatigably through coming one year, finished development job smoothly. 2. Embedded architecture of numerical control system is designed normally the overall block diagram of system of a numerical control is like a graph 1 is shown, by control system, servo drive system and composition of servo electric machinery. Control the statement of reference axis exercise that the system makes, undertake fine interpolation by FPGA, the form that forms pulse to string together finally dispatchs servo drive system, system of final servo drive forms motion to dictate control servo electric machinery runs. Graph the total construction of system of 1 numerical control the article is application to study a target with system of numerical control of open loop of a 3 axes, plan to design to be based on ARM embedded of microprocessor and FPGA embedded numerical control system, pursue namely the control system part of 1. The logistic natural resources of the operation resource because of microprocessor and FPGA is limited still, and what microprocessor is good at is serial data processing, and what FPGA is good at is collateral logistic processing, because this project is medium,to the function the soft hardware of implementation undertook differentiating. Go analysing from the angle of hardware architect, whole circuit board the system can be divided for board class system and chip class system. Board class system by microprocessor subsystem, FPGA subsystem, DA changes subsystem, signal segregation and changeover subsystem, power source subsystem is formed. Structural block diagram is shown 2 times like the graph. Graph block diagram of system of 2 board class is restricted as a result of length place, so the article enters pair of microprocessor subsystem to undertake brief introducing. Microprocessor subsystem includes communication interface and ARM subsystem, memory subsystem and LCD interface, serial interface, if the graph is shown 3 times,comprise block diagram. UP-SOM44B0 of systematic core module is achieved for rich inside casing of the empty in the graph. Graph block diagram of 3 microprocessor subsystem among them, ARM is a kind embedded processor, basically be in charge of operation, memory is in charge of the memory of program and data and file system, the download that communication interface is in charge of machine program and upload, collateral interface realizes the communication with FPGA, serial interface realizes the control memory subsystem of pair of DA converter to include FLASH, SDRAM and NVRAM. FLASH storage program and file, the program when SDRAM stores the system moves and data, NVRAM memory is real time systematic condition. The is based on RS232 standard data of communication interface implementation and PC corresponds. The data of collateral interface implementation and FPGA corresponds, serial interface implementation is controlled to DA converter. 3. Soft hardware adjustment and course of test of machine tool treatment check, the IO output signal of this system is OK the relay that drive machine tool uses commonly. Can realize the function that be as follows: Main shaft positive and negative turns and stop, the switch control of cooling fluid, the switch control of lube, to change a knife reversely, tool carrier apply the brake, main shaft apply the brake. Chuck and tailstock function did not equip as a result of the machine tool, did not have a test so. Common IO inputs signal to be able to accept the signal of the machine tool to have: Tool carrier reachs the designated position signal, signal of tool carrier locking, decelerate signal, null signal, circular actuating signal, main shaft rotate speed arrives at signal and tool carrier to choose communication date to wait a moment. 4. Look into recently 5 years, no matter numerical control machine tool of China is in line of the products, great progress was obtained on amount and quality, the numerical control machine tool of our country enterprise has rate year after year to rise, in big in the enterprise already had more use, in medium and small businesses in individual even business begin generally also to use, have home market gradually, export many nations. Join WTO as our country, a few years exit of our country machine tool will come true henceforth smooth, grow continuously. But, this crucial technology comes to numerical control system at present tell still have a few a few country control only, because foreign enterprise will not wish to transfer a technology impossibly also, domestic user purchases foreign capital product only, bring about industry of domestic numerical control to expand hard thereby. Be based on rich to achieve embedded the numerical control system of core module UP-SOM44B0 obtained unprecedented breakthrough in the technology, make numerical control system is not the high mountain of impassable any more on the technology, for Chinese numerical control development laid good foundation, from now on the new generation that China had those who belong to his to have own intellectual property opens platform of system of type numerical control, received good application in Guangzhou numerical control. Believe to be in before long in the future, we will use the system of numerical control of form a complete set that has a variety of machine tool kinds, we have hope capable also to accomplish this, confident to its future. CNC Milling