I just did my first aluminum cutting as well, but used very different speeds/feeds,
1/8" ZrN coated 2 flute end mill
DOC = 0.020"
Step over = 40%
Feed = 22ipm
Dewalt on SuperPID all out around 30,000
Tried with and without WD40 as coolant, didn’t appear to make any difference, but made a mess.
I had originally started with a slower 22645rpm spindle speed and a slightly slower feed/plunge, with a larger 0.040" DOC and the SO3 did not like it at all (end mill clogged, machine lost steps, had to hit the EStop). So I halved the DOC and it was a lot better, but still not great, so I upped the spindle speed and feed/plunge and it went still a little better. I’m using GWizard, and I’m still not very confident with the numbers it gives me. For almost anything I feed it I get 30,000 for RPMs, not sure what I’m doing wrong, but I’ll keep watching videos… There was noticeable deflection where I had tabs, which I sanded out in the final pieces. Lots of hand finishing, which I tried to avoid, but I think that was my fault for using too many tabs (probably should have just done an onion skin.
All in all I would call mine “semi-successful”. The clamps I made are usable, but not very pretty… Learning!
Yours look much cleaner than mine, cool stuff!