I’m trying to face some 6061 and I’m curious what sort of results I can expect out of the Nomad. I took a 3 thou pass with a Ti-Ni coated end mill. I’ve tried using the 1/8" dia one and a .25" one. Seems like no matter what I try with feeds and speeds and end mills I always end up with a bumpy surface finish. I can feel long ridges left after the cut (in the direction of the cut). Some parts of the piece are completely smooth. I’m wondering if I’m just up against the limit of the machine or if there’s something I can do about it.
Also, it sounded like the spindle motor kept loosing revs and then I’d see a visible mill scale where that happened. Not sure what’s going on there either. I’ll try to upload some pictures.
This was a .125 end mill at 8k RPM, 16 in/min with a 3 thou depth of cut and 50% step-over