@joojaa And Engineering.SE is not the right place to ask such a thing?

@Joachim im not trying to engineer anything, in fact i dont want a engineering solution. I have 2 i want a arts and crafts persons view

But Engineering is about more than just that, it seems. Your question about whether or not autofocus is common in these publicly accessible laser cutters seems more appropriate for that site than ours, and I also can imagine their are more users there with similar experience with heavier machinery.