I have a question to try and get my head around the action of the laser when making a cut.
I believe that the laser beam is conical in shape. (Other post)
If so it would suggest that the perfect height of the laser above the workpiece would be at the convergence of the beam.
(pin point).as the beam passes through the material I assume the cut gets wider. (See attached image) What is the depth of field (Lense technology) for the lense. This would suggest the maximum thickness the laser can cut in one pass
Am I on the right or wrong path to working this out John