1. During the use of CNC engraving and milling machines, it is important to note that the processed thickness should not exceed the thickness that the cutting edge can cut, otherwise there may be situations such as tool breakage. The body, hair, and clothing should not be close to objects at work.

2. When cutting, the speed should be kept balanced and as consistent as possible in order to achieve better results. The cutting process should not be stagnant and should be completed in one go. For cutting different materials, it is necessary to use cutting speed reasonably.

3. The size of the jacket should be appropriate, with a cross-section, wear, lack of roundness, and a taper in the inner hole. It should not be selected, otherwise it will cause the tool handle to vibrate and the carving and milling will not produce the desired effect.

4. Regularly check the toughness of the cutting tool. If the tool becomes dull, please replace it with a new one immediately.

5. The handle should have gentle contact with the jacket, and the handle should be firmly inserted into the jacket and tightened. If the jacket is used for too long, the inner hole may deform, and the jacket needs to be replaced immediately.

6. Special cleaning agents should be used to remove dirt and butter should also be applied to prevent tool rusting.