So a little success.. got the slots cut without issue.. no smoke.. no burnt MDF.. much cleaner cut on the top of the MDF too.. I used 1500mm/min with the 2 degree ramp down at 1000mm/min & then upped it 20% where I could hear a little low frequency vibration.. not certain what it was I didn't go further but I'm happy with the cuts. This was at 6mm DOC & I forgot to mention spindle speed before.. but this was at 12k rpm. Before I was at 18k. Much too fast. So both of these changes probably helped..


The T-slot bit next.. Is the strategy the same? ie. 12k RPM and 1500mm/min.