I have seen some posts on engraving on a curved surface, but my situation is a bit different…
I’m trying to similar to a drink coaster, but larger. The idea is that I am going to use the CNC to make a circular “pocket” where you would set your drink. However, after I do that, I’m going to engrave the whole thing, both the main face of the wood, and, ideally, the circular “pocket” in one pass.
How big of a problem would this be since the “pocket” is sunken down more than the face of the board? Does this pose a safety hazard because at this point the laser is out of focus compared to the main part of the board being engraved (I read on another post that unfocused laser + wood = fire)? How much of a difference is generally unacceptable? 1/8", 1/4", 1/2"?
Below is a photo of the wood prior to engraving, just ignore the handles on the sides. Thanks!