3. Parts with small surface roughness value. The surface roughness depends on the cutting speed and feed speed when the workpiece and tool material, finishing allowance and tool Angle are given. Ordinary machine tools are constant speed, different diameter cutting speed is different, like CNC lathes with constant linear speed cutting function, car end face, different diameter cylindrical can be used with the same linear speed, to ensure that the surface roughness value is small and consistent.
When processing surfaces with different surface roughness, the surface with small roughness is selected with small feed speed, and the surface with large roughness is selected with larger feed speed. The variability is very good, which is difficult to do in ordinary machine tools.
4. Parts with complex Outlines. Any plane curve can be approximated by a straight line or an arc. Numerical control machine tool has the function of arc interpolation, which can process all kinds of complex contour parts.