In the process of economic CNC machine tool, because the tool sharpening, measurement and replacement are mostly manual and take a long time auxiliary, therefore, must arrange the order of the cutter reasonably. Generally follow the following principles:

1. Minimize the number of tools
2. After a tool is clamped, it should complete all its processing steps;
3. Crude finishing tools should be used separately, even if the same size of the tool;
4 before drilling after drilling;
5. First surface finishing, after two-dimensional contour finishing;
6. Where possible, should be used as far as possible CNC machine tool automatic tool change function, in order to improve production efficiency.