Your focus is not set to the correct length. More speed and more passes will reduce the charcoal around the edges. FWIW my 10w ortur laser takes 100% power, 1000mm/m and 8-12 passes to cut through 4mm wood.
Your focus is not set to the correct length. More speed and more passes will reduce the charcoal around the edges. FWIW my 10w ortur laser takes 100% power, 1000mm/m and 8-12 passes to cut through 4mm wood.