In fact, the selection of cutting speed of double drive fiber laser cutting machine is also very important. A good cutting speed range can be selected according to the equipment instructions or determined by experiments. Due to the thickness of materials, different materials, melting point, thermal conductivity and surface tension after melting, the cutting speed also changes accordingly. The correlation between cutting speed and cutting effect of double drive fiber laser cutting machine is mainly shown as follows: 1. Properly increasing the cutting speed can improve the quality of the incision, that is, the incision is slightly narrower, the surface of the incision is smoother, and the deformation can be reduced at the same time. The price of laser cutting machine should make clear the production scope, processing materials and cutting thickness of their own enterprises, so as to determine the model, format and quantity of equipment to be purchased, so as to pave the way for the later procurement work. 2. When the cutting speed is too low, the incision becomes wider, the molten materials on both sides of the incision gather and solidify at the bottom edge, forming slag that is not easy to clean, and the upper edge of the incision forms a fillet due to excessive heating and melting. Auxiliary gas suitable for the material to be cut is also added during the cutting process of the double drive fiber laser cutting machine. When cutting steel, oxygen must be used as auxiliary gas to produce exothermic chemical reaction with molten metal, oxidize materials, and help blow away the slag in the slit at the same time. Compressed air is used to cut polypropylene and inert gas is used to cut flammable materials. 3. The cutting speed of the double drive fiber laser cutting machine is too fast, which makes the cutting linear energy lower than the required value. The jet in the cutting seam cannot quickly blow off the molten cutting melt immediately, resulting in a large amount of drag. With the slag hanging on the incision, the surface quality of the incision decreases.