I made this to manually focus/defocus the laser to make thicker lines. The way I built my laser, its not very rigid, so unscrewing the lens to move it always misaligns something. So I made this to make it easier to adjust with just a little more precision. I made for a 1/4-20 screw. Still need to tweak it a bit to make it easier to adjust.

11/20/19
Updated the parts a bit. Made them thicker for strength and also added 1/4-20 threads to the top part. I still ran a tap thru it to clear it out a bit and also added wax to the screw for smoother turning. I was able to get a much finer dot.

Elegoo

No

No

0.2

20