At 100 yes. It stays in the pants area long enough to burn. The problem is the gray areas are also black fully due to them staying there for a longer time. I'd rather have the max speed high and the darker the area / time staying in that area be correlated. I believe I had the laser power minimum set to 0 and max to 120 or so. I'd have to look again. Mind you... part of my issue could be that it is a 4W laser. The power shouldn't need to be near full power to burn properly. If I get another chance to play with the settings I will. I believe my Max speeds are 100mm/s on X... but again... I'll have to look.