Re: Faceted surface finish with Fusion 360 on 770
General rule of thumb: use the largest cutter that your part will support (up to 1/2" anyway). Seems like you could easily fit a 3/8" or bigger endmill into that part.
1. How much stick-out do you have on the endmill?
2. How are you calculating feeds and speeds for your cutters? What values were you using?
3. How are you securing the part you are cutting to the table?
How about you run a circular pocket in a chunk of aluminum using path pilot conversational mode, and see if it gives you the same finish? That could tell you if it is a CAM or a machine problem.
Tim
Tormach 1100-3, Grizzly G0709 lathe, Clausing 8520 mill, SolidWorks, HSMWorks.