One question that I was wondering about is when cutting thick material...not engraving...but cutting, where would one focus the beam.....at the top of the material, bottom, middle or somewhere in between?
Is the location of the focal point of the beam a function of thickness of the material being cut?
Does speed and power have any significant effect on beam focus location?
How about the focal point with respect to material...ie plywood, solid wood, clear plastics, coloured plastics...etc etc.
Although I can start a series of experiments to determine whether this is a black art or not, I thought I should ask the group for their comments and knowledge in cutting thick materials....say 1/4" and up.
Maybe there is just a simple guideline to follow and I'm making more work than necessary. Inquisitive minds want to know.
I look forward to any replies.
Richard