I have just tried a different grade aluminium that’s supposed to be pretty good with not great success. I was running it at 0.3mm per pass, 15mm/s feedrate and 3mm plunge rate. I tried trochoidal as well and that seems even worse for me.
So it starts off not too bad, then as it gets deeper, the bit starts to drag along and even slightly bend as it tries to keep up with the speed.
I’m now wondering whether it’s because I’m using a spindle rather than a router. My spindle is rated at a maximum 15,000RPM @ 500W. Could this be the issue? Has anyone successfully done aluminium with a spindle? Any advice much appreciated. …And yes I have seen the videos posted here and on the facebook page. It just doesn’t work well for me. Ah and using a 3mm single flute, then tried 4mm 4 flute with same results. Grrrr!!!