replicapro you need to increase the speed, do not know what size cutter you are using, type of mill, feed or type of cut but you may need to slow the feed down and be sure and keep the chips out of the way which may well be most of the problem, best to flood them out or blow them out with air, however you do it keep them out of the way. I have got the best cuts using a aluminum cutting carbide cutter.

Ken