Hmm, let’s see.
Rather than give you exact settings (each piece of purpleheart I’ve cut has been pretty different from the rest…) I’ll teach you my testing method.
You can dial in your specific piece of wood pretty easily using this method, should only take a few minutes to get it just right.
Purpleheart is pretty tough stuff, so expect it to take some oomph.
Anyway, after all this preamble…
I think in the end I was near 180/full/1x on a pro… but this is fairly useless because the next board I hit only needed 210/full, the one after that was 170/full. Slight variations in thickness/density/moisture count/sunspots/who knows can make your cut succeed or fail. Testing is the way to go.