Originally Posted by
Gary Campbell
Low torque motors will produce a very uniform "scalloped" edge. This is often referred to as chatter, but if you look closely you will see that the scallops line up from top to bottom even tho a dozen or more passes have been made. The fact that they line up removes the possibility they were random, eliminating chatter. They are evidence of "detent jumping". Circles, and the changing torque requirements as the 2 axes change speeds and reverse direction are difficult to cut perfectly, and therefore used to spot the issue.