That’s something that’s going to vary between pieces of wood - here: Has anyone been cutting 0.37-0.40 material? is a test pattern that you can load into your GFUI and keep for whenever you need to answer a question like this. The first time you load it you’re going to need to program each of the steps to do what it says, but then as long as you don’t delete it, it’ll be there for future material.
You see how the circles are cut off on the bottom on that test piece? You place those over the edge of your wood and run the test, and then you can brush out the holes and figure out exactly which power gets you the depth you want.
Good luck!