FAQQ: Do I need two laser machines to engrave and cut separately?A: No, the laser machines we provide are capable of both engraving and cutting. One machine alone can fulfill the two purposes.Q: Do the laser machines need to be connected to a laptop or desktop computer to work? A: Yes, either is ok. It supports Windows 10, Windows 2000, Windows XP, Win 7, and other operating systems.Q: What kind of graphic format does it support? A: JPG, PNG, BMP, PLT, DST, DXF, CDR, AI, DSB, GIF, MNG, TIF, TGA, PCX, JP2, JPC, PGX, RAS, PNM, SKA, RAW , etc.Q: How to distinguish laser tubes with different powers and applications?A: 1. Laser tube length (relatively speaking, the longer, the bigger) 2. Laser tube diameter (relatively speaking, the thicker, the bigger) 3. The bigger a laser tube power is, the deeper the machine can cut, but its light spot is bigger. So, it is better to use a machine with a low-power laser tube to engrave, such as 40W, 50W or 60W.Q: Is it better to increase blow to improve laser processing performance?A: For some thick materials, it works. But, when carving some other materials, you need to blow less.Q: How long will it take to learn to operate a laser machine?A: If you are able to use some basic graphic design software, it will only take a few hours to master the operation. You just need to do some simple tests on different processing materials to know how to set the correct speed and laser power.Q: Is a laser machine in operation harmful to our bodies?A: It is not harmful as long as the laser is not exposed directly to skin and eyes.