Q: (cutting) Is it better to do many many passes with less power
less passes more power?[/quote]
I prefer one cut, with air assist.
Way too slow. You should easily cut through in one pass. You should be able to cut 5mm in one pass.
If you look at a piece of acrylic that hasn’t been cut all the way through, with the same settings on min/max, when it reaches a corner the depth of cut will nearly double,
Having min/max allows it to drop the power as the head slows over the material during cornering.
It’s worth experimenting with - I couldn’t work out why a design wasn’t cutting out when I had power on my 130W at 65% - because my min was only 25% and the design was mostly small circles and other curved shapes, it was spending most of the time on the lower power. Adjusted minimum and it cut great.
For engraving I don’t bother as it gets eaten up. For cutting, depends on how intricate the cut - if it means twenty minutes of weeding, I peel off both sides and lay it on a pin bed