1. White steel knives don't rotate too fast.

2. Copper parts use throwing knives and carbide knives, not white steel knives.

3. If part too high, should be roughened with a knive of different lengths.

4. The plane should be processed with a flat knife and less use ball knife, reduce the processing time.

5. When we clear the part's corner, first check the size of R on the corner, and then decide the size of the ball cutter.

6. When the slope is an interger, it should be processed with a slope cutter, such as pipe position.