- My laser: 40W ULS VersaLaser with 2" lens
- Laser settings: power=90%, speed=3.6%, PPI=300, z=.110" With and without air assist.
- The material: 3/16" cast acrylic, with 8mil photo print and 3mil poly lamination film. The paper mask still on the underside of the acrylic.
- The problem: laser burns/melts the lamination film at point of the cut
I have tried for years to solve the above problem, and a few days ago I tried lowering the focal point from .177" to .110" and I got absolutely perfect cuts!
The next day I used the SAME piece of scrap, the SAME settings and I got the SAME old terrible cuts.
It seems my laser accidently made a few marvelous cuts.
I would be forever grateful if someone would help me solve this mystery. Any ideas? Maybe erratic power output? Global warming? ??? Stock prices?
Thanks!
Al