Thanks for your reply. That vertical line is indeed a flaw in the wood. I will turn off the air and try to burn at a lower intensity. But still I don’t understand why one line is darker than the other, even though it is in one layer. He does this not only in these examples but in other projects as well. Could it be that the laser head needs to be cleaned? Does the laser head ever need to be cleaned at all?
Below is another photo, this is the same file burned at the same speed without air, but one line is very dark and other lines burn very light. Greetings Marianne
