In the process of using the xTool F1 Ultra, it turned out that the installed exhaust fan does not cope well with smoke extraction. Some of the smoke enters the fan, and some rises up, where the lens, camera and mirrors of the galvoscanator are located. The problem with smoke is solved quite simply. At one time, I bought a small fan from a computer store with a switch on the back and USB power. Thus, the fan is connected to the USB port on the left side of the marker. The fan is placed in front of the marker and the air flow from it is directed to the workpiece, but taking into account the suction fan of the marker. In this simple way, an influx of air is created, which allows you to effectively remove smoke.