I did read this, but think about cutting a 2mm bit of aluminium 0.2doc would be a real pain in the ass.
However I think I know how to fix this! I spent 3 hours trying this earlier. I then read this evening that single flute bits might cut better…
So here is a 1/8 single flue bit - it cost about 50p shipped from china. I have only used them on acrylic before.
I then ran the same code - 800mm a min, ramp 0.1 degree and 0.2 doc…
Chips! and shut the front door! Clean cuts.
In front is one I just did in 3 minutes the one behind took 3 hours and was not repeatable even then wasn’t great!