Finally had some time to dial my machine in to cut some aluminium.

Most of the cutting is done with a 4 mm single flute carbide end mill. With the exception of chamfering where I used an 8 mm 90 deg spot drill.

I don't have a compressed air setup in my workshop at the moment so the cutting was done mostly dry with a few squirts of WD40. The addition of an air blast/microdroplet system would greatly increase my options in terms of cutters and feeds/speeds and machining strategy, so that is on the list of upgrades to come.

The surface finish on the profiling was pretty good, I think a 3 flute carbide cutter may give a better result or at least finish the job in less time.

My machine design/build is documented on my website: http://www.jeremyyoungdesign.com

If you would like a copy of the 3D model for my CNC machine, please vidit my Etsy store:
https://www.etsy.com/nz/JeremyYoungDe...