I do adjust my speed, depending upon what I am cutting. If it is thicker, I usually slow the machine down, when I am doing the ornaments and such, it is a faster speed, but it is also what I have become accustom to. So just my thoughts, play and see what ya come up with. There are guides and suggestions from various wood working sites that can give you something to go by. Off the top of my head, I cannot remember, but I am sure they are in Jaun's favorites and I will have to get on his laptop to find them.