Great I'm glad to hear it got you excited!

I don't think it is the stepper or a rigidity problem, but I don't know what it is. Some layers the laser moves smooth, some it shakes. Sometimes half way through a layer it is smooth then shakes. It doesn't appear to be caused by a layer being too complex for the speed am moving the mirrors at. I think this because some times a layer will be smooth then basically the exact same layer will have a bunch of shaking. Maybe the PWM I am doing (instead of the normal analog voltages) is causing problems. I don't know. I will just have to debug it with various tests.