I finally got a chance to try a ‘finished’ work after experimenting with engraving stones. Thanks to other’s work before me, I was able to quickly converge on a nice result:
Stone is about 70mm long.
BiDirectional Fill, No Overscan,
Line interval: 0.05mm (508LPI),
Number of passes: 1.
Line after Fill: 6000mm/m, 20% power.