Made a few trivets old-school with a radial arm like this.
Had to sneak up on the settings to get halfway through 1/8" ply, but the effect was worth it.
Run the same file twice. First side then flip it over and burn it again perpendicular to the first.
!00% / 200 ipm / 340 lpi should get you there.
This is a pre-release, so YMMV. Again,the file is just as an example, so build yours according to your needs. The method would give a nice lattice effect to augment your designs…
Edit; for scale this is 5" on a side.