SCULPFUN S70 Max suddenly burns plywood instead of cutting through
I’ve been using my SCULPFUN S70 Max for about six months without any problems. Until recently, it was cutting plywood cleanly and consistently.
The two photos show the same material test performed on opposite sides of the exact same plywood board, using the same settings and a single pass.
In the first test, the 100% power square cut cleanly through the plywood. When I repeated the test today, none of the squares cut through—not even at 100% power. Instead, the surface became increasingly scorched as the power increased.
I’ve cleaned the laser head and replaced the protective lens, but the problem remains. It seems as though the laser has lost cutting power: it produces a lot of heat and surface burning but very little cutting depth.
Has anyone experienced this? What should I check next?
