I was talking about engraving IKEA cork coasters, and how to detemine the thickness of the bottom. There are lots of ways to do this, but for my money, using your digital calipers is the fastest and most accurate way to get there. This technique would work with anything with a “lip”, so you can adapt it to your specific needs. Here’s how:
Get a small item that is thick and will fit inside the coaster. A nice big 6-sided die will work fine.
Be sure it’s taller than the lip.
Cool, measure the die.
Zero the caliper.
Put the die in the coaster and measure the whole thing. Voila, height of the bottom.
Now do you want the “height” of the lip?
Close the calipers and zero them again.
Open them to your base thickness, my measurement was 0.2635".
Rezero them here.
Now measure the thickness of your coaster, this will be your lip height.
Great, it’s less than 0.5", you’re good to go, now you just need to go engrave it.
Be sure you know how to remove the tray and engrave thicker items here, as the entire height of the coaster is more than 0.5".