So I got some sample sticks of ipe wood (aka ironwood) at my local lumber shop. It’s way out of spec, at .3 inches and extremely hard and dense.
First step, cut it down a bit with the passthrough. I took a wild guess at 100/Full (Pro). It definitely worked.
Then I tried to dial in a cut that wouldn’t char much, and found it at nine passes at 230/Full:
The cut surface is a super hard shiny black, almost like an enamel. I figure it’s a polymerized sap. I tried to sand it off and it didn’t want to move at all. This stuff is very very strong.
So these settings are probably useless to anyone but the thing that I think is noteworthy is that ipe’s cut surfaces are really cool.