Well, I guess I already learned it, by “well, don’t do that!” But would like some clarification on the GlowForge autofocus. I had the crumb tray in, and put a bamboo cutting board in that’s about 3/4” thick. I checked and it cleared the laser head and then some. Send the job, a 8 min logo, and wow it’s blurry. Canceled the job and sort of ruined my board. Sanded it down, pulled the crumb tray added spacers under the board (just less than 1” of spacer) and ran the same job. Perfect engrave. Hmmmm. How does autofocus work? Seems like it should have warned me I was too close to the head and made me over ride/cancel.
Now I am nervous about how thick something can be, I sort of ruined someone’s cutting board. I will sand it some more and see how it looks.