I use my laser exclusively to cut cardstock in the 0.010 to 0.045 inch range.
I had a 2.5 w Eleksmaker and could dependably focus it to get 0.006 +/- inch kerf, to use a saw analogy, with no noticeable difference in the x or y direction. I ran it too long and burnt it out.
I replaced it in kind and the new one gives totally unsatisfactory results. The “dot” is much bigger and is a rectangle. I emailed Eleksmaker a couple of time and it is a black hole.
Any suggestions for a 2.5 to 5.5 w laser module that can get me back to where I started?