Last week we got the 60 watt laser cutter “officially” online and working. We even got a bunch of people trained on using it. There’s still an issue with homing, but if you follow the instructions, it works fine.
And by “works fine” I mean it “works great!”
I ended up cutting my Nerdy Derby car last week, and I also did this laser-etched coaster, which is about 3.75″ in diameter and 3mm thick. There was a little bit of scorching at the bottom, but I may be able to sand that off easily. I was still playing with the cutting settings a bit. I may also play with the masking tape idea to prevent scorching the surface when cutting.
The artwork for the coaster is a mathematician from a NASA coloring book, and I found it on OpenClipArt.org which is a great source for public domain vector-based artwork.
(Oh, we also ended up connecting the PC that was on the 25 watt laser cutter (which is down for maintenance) because it’s got a newer version of CorelDraw.)