had to find the camera, the holidays swallowed it
the top-center TEST is the winner, definitely better than my test runs before it-
test3.jpgtest4.jpg
this is the best 'cheap shot' in perfect light
but note the depth, not a lot but a couple thou maybe,
definitely qualifies as "engraving"
test1.jpg
a bit different angle- this shot (and the next) point out the issue
that plagues the 'fast hatch'; because it runs in different directions
to optimize speed, sometimes a seam doesn't quite overlap enough...
pretty deep and dark--
test5.jpg
This shot has overhead light directly hitting it, and it shows that the
bottom isn't really all that smooth, BUT, the tight hatch and several
high speed runs did effectively blunt the peaks down, allowing the
anneal to 'take'...
test2.jpg
it still has a some holographic effect at some angles but not nearly as much as 'basic' blackening.
The high-speed trick to deep engraving I learned from Gary, different variations give different results,
but the main benefit is a much smoother finish than really-deep-really-fast ablating. And in the end,
it's not all that much slower