We do all of our braille signs using a rotary-engraving machine -- get awesome results, but very noisy. Have any of the laser engravers out there had any success doing this process with their lasers?
Let not the one who says it can't be done interrupt the one who is doing it.
There are several engravers on sawmillcreek.org who do braille with laser engravers. You may want to check out their forum and do a search.
Can do. Thanks.