Hello, I am complete beginner at laser cutting and engraving, I have some Chinese laser 80W. The problem is that it can’t cut bigger drawings. It can cut like two small pieces about 2-3 cm big. But if I want to cut something biger like 8x8 cm it can’t cut, mostly parts of drawing cut, but there are some parts where laser cant go trough material. I tried cutting 4 mm MDF. I cut on 9 passes and 60 power and 600 mm/s speed, if I increse parameters it burns.