I did a bunch of tests today with a 2" square to see what results I could get. I still do not love the overall cut. The top half of the cut looks great to me but as the laser cuts through the bottom half it gets ridges.
I tried:
- .50, 120 speed, Full Power, 3 passes… results? flame for first run, one spot still slightly connected, edges mainly smooth will slight ridges
- .50, 130 speed, Full Power, 3 passes… results? Not all the way through the material
- .50, 115 speed, Full Power, 3 passes… results? best yet! Had to push through main piece
- .4550 115 speed, Full Power, 3 Passes…results? looked very good and came away clean from the main piece!
- .4550 110 speed, Full power, 3 passes…results? good but 115 speed was better
- .4540 115 speed, Full power, 3 passes,good but .4550 was better!
- .4550 115 speed, Full Power, 2 passes…results? Doesn’t cut through
- .4550 115 speed, Full Power, 4 passes…results? finished edge was okay but not better than the 3@FULL
- .4550 115 speed, 100 percent, then 1 at full then 100 percent…results? Ridges feel rougher, harder to get out
- .4550 115 speed, 100 percent, then full then Full…results? Ridges feel rougher, harder to get out
- .4550 115 speed, 100 percent, 4 passes…results?..hard to remove…
**I did notice there were less flame-ups at 100% power vs FULL power, however 100% did not cut through in 3 passes as nicely…
I zeroed in on .455 as the thickness, 115 speed and Full power for three passes (small ~1min) break between each pass. Your mileage may vary!
I assume a “real” shop would then sand the edges and use a torch to make them clear again, but I’m not sure I have the energy for all of that! 
