As I set up a means of high accuracy I had made many cuts from the same location over several hours the apparent place of cutting was over a half inch below the actual place of cutting so I made the adjustment and was able to run several prints of proof grade maple and PG MDF as well as some HD plywood. Then just as a new cut was starting we lost power for ten seconds.
The Glowforge halted in place and when power was restored went through its routines as it had just been powered up the computer went to its own battery so did not lose power but the internet was dropped and took several minutes to restore meanwhile the Gfui continued to act like it was actually cutting something stepping down the timer while the Glowforge was waiting for instructions.
I presumed that restarting the cut would continue as before but while bit had been a half an inch off suddenly is was printing where it said and ruined the design and also the tile being used to set the point. But I am still having trouble getting even a cartoon photo engrave to show a decent range of shades beyond a few close browns.