Having this same problem, except for me it’s an issue of material. I made a few runs in “air” and 6 runs in plywood, no problem. I bumped the feed rate down from 250 to 165 (which is sooooo slow) and used Aluminum with lots of cutting fluid. It stops randomly, red lights flashing, sometimes after an hour, sometimes after 10min.
Is there no way to get the actual status – some indication of specifically what caused the halt?
FWIW, I tried turning the motor by hand after it halted on a linear section (IOWs, spindle still on, still cutting) and the effort required was indistinguishable from “air”. I’m doing double passes, 1mm cuts w/ a 1mm conical end mill. So the 1st pass is the most stressy, cutting 180 degrees of the mill. But it’s halting while only doing <90%.
