So I wasn’t quite sure where to post this, but here seems to be a good enough place, since it’s not really a “Problems and Support” thing.
On my first self-created Illustrator file, I created a bunch of rectangles to cut, with a 1 pt stroke and no fill. When the file started to cut, the run time was 14 minutes and change, which I thought was long for the file, but I don’t have any experience to compare it to. I watched the cutout of the first rectangle, but then it began double-cutting lines, so I stopped the print.
Having browsed the forums religiously for the last two years, I said “ha, I must have double paths!”. But that wasn’t the case.
When I took the piece out of the Glowforge, I noticed that it wasn’t cutting the same line twice - it was actually a tiny fraction of an inch away, leaving a sliver of wood in between the cuts (super-thin - you could bend and twist it easily).
The only thing I could see in my file was for some reason some of the rectangle paths had an inside stroke, rather than a center stroke. My theory (based on purely anecdotal behavior) is that the Glowforge software cut the inside stroke, then went back and cut the stroke again as a center stroke.
After I made all of the strokes center-aligned, I re-uploaded the file and got a 6:30 run time, and no double cuts.
So, to make a long story short (too late!), I believe that instead of Glowforge ignoring stroke location and cutting down the center of the path, it obeys the stroke placement when cutting but then cuts the center anyway.
I’ll test some more but not tonight - has anyone else seen this?