Longer B1 20W & 30W & 40W has a laser module that can engrave and cut various types of materials. However, depending on the type of work that is carried out, it is possible that a fair amount of smoke and wood dust is produced, which will inevitably settle on the fan of the laser module and suck into it. In fact, due to the high power of the laser beam, the laser module tends to heat up and for this reason it is necessary that there is a high-speed cooling fan; however, during its operation the fan sucks in the surrounding air and, if this is rich in smoke and dust produced during engraving, inevitably the fan and the laser module will soon be full of smoke and dust as well. When the laser module is saturated with dirt, cooling becomes ineffective, so you need to clean the laser module.
