I recently acquired some 1/8" Padauk from Inventables:
After some experimentation, I’ve found the Proofgrade settings for Medium Basswood Hardwood yields the best overall results. I did try other settings, including lower power, higher speed, multiple passes, etc., and didn’t observe a significant advantage over the Proofgrade settings. The manual equivalent to Proofgrade Medium Basswood Hardwood is: speed=200, power=Full, passes=1
Despite how dry the wood feels, the Padauk “juices out’ quite a bit and gets carmelized/burnt by the laser. Lower power settings did little to reduce the effect. In fact, I wasn’t able to cut through the 1/8” panel below 50% power - I presume the resins in the wood are pooling in the kerf and absorbing the beam power, apparently indefinitely.
Fortunately the cut edge of the Padauk cleans up nicely. The photo below shows the cut edge before and after cleaning up (scrubbing) with 70% isopropyl:
The engrave settings for Proofgrade Medium Basswood Hardwood also work well:
If anyone else has their favorite settings for Padauk, I’d like to hear about it!