The number of controllable axes of a CNC machine tool refers to the number of coordinates that can be controlled by the CNC device of the machine tool. The number of controllable axes of a CNC machine tool is related to the calculation processing capacity, calculation speed and memory capacity of the CNC device. At present, the number of controllable axes of the German Siemens CNC system has reached 31 axes.
The number of linkage axes of a CNC machine tool refers to the number of coordinate axes controlled by the CNC device of the machine tool to reach a certain point in space at the same time. At present, there are two-axis linkage, three-axis linkage and four-axis linkage. The Japanese fanucoi system has achieved six-axis linkage. Three-axis linkage CNC machine tools can process complex surfaces in space; four-axis linkage and five-axis linkage CNC machine tools can process aerospace impellers, propellers and other parts.