at first I thought it was the machines limitations but know I think I have messed something up. I have tried cutting two different types Baltic and red oak both 3mm. Settings started at 100% 10mm/sec 30 passes. This would cut about half way through. Then I broke down and upped the laser to 2.2 amps with no visible change in results. I have checked the focus step by step several times and I think the beam is as narrow as possible, the cuts are almost razor thin. I have now wasted 4 boards of each. Any help would be appreciated as I just read a post where Juergen cut 4 mm plywood in 4 passes At 350mm/min which I believe is 5.8mm/sec.