If you press the workpiece contour programming, cnc machining shape, contour in the workpiece, the actual contours of a large tool radius value; in the outer contour of the workpiece, the actual contours of a tool radius and small value. Use the tool radius compensation methods, numerical control system automatically calculates the tool center path so that the tool center deviates from the contour of a tool radius value, to process the contour line with requirements of the drawings. The use of the tool radius compensation function, changing the tool radius compensation, but also can compensate for tool wear and processing errors, to achieve the workpiece roughing and finishing. Tool length compensation Tool length change compensation amount, cnc engraving process, the length of the offset value can be compensated after tool change, you can also change the position of the cutting plane, the control axial positioning precision of the tool. The cutter tool used in CNC milling machine parts to be processed according to the materials, geometry, surface quality requirements, heat treatment, cutting and machining allowance, Beijing cnc machining, select the rigidity and durability of the tool. Common tool shown in Figure 3. (1) cutter type is selected according to the geometry of the machined parts, select the tool types are: 1) the processing surface parts, in order to ensure cutting edge and contour is tangent to the cutting point, to avoid the occurrence of the blade with the workpiece contour interference, cnc machining fixture, generally use the ball knives, edged cutter roughing, semi-finishing and finishing with a four-blade cutter, as shown in FIG. 2) milling large flat: In order to increase productivity and improve the surface roughness, the general mosaic disc cutter blade, as shown in FIG. 3) milling small plane or a stepped surface generally use common cutter, as shown in Figure 6. 4) keyway milling, in order to ensure the dimensional accuracy of the groove, usually with a two-edged groove cutter, as shown in FIG. 5) When drilling, can drill, boring class tools cnc machining holes molding _ gold-precision (certified) _ Beijing cnc machining provided by Huizhou Hing Precision Parts Co., Ltd. Huizhou Hing Precision Parts Co., Ltd. (hzjxbp.com) (www.hzjxbp.com) is an industry leader in Huizhou, Guangdong, the standard mold, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. In the gold-Precision leadership with the staff warmly welcome all inquiries negotiations to create a gold-precision better future.