Additional - anyone know why EVERY operation sweeps the length of the work (with assigned stepover) ad the OD diameter? At first I thought it was a safety thing (get rid of anything oversized), but that assumes that people would never put oversized stock in and end up with too deep a cut. Or it was put as a facing operation - but that shouldn’t be compulsory. It just seems to waste a lot of time with no real benefit. Anyone know?
Secondly - I had it do an 8mm diameter and 9mm diameter cuts, done on the same stock without adjusting anything. They came in at 8.4 and 9.6mm. Some may be incorrect Z height, but that should have led to the same oversized (eg. 0.4mm on both). Neither is it the bit slipping in the router, as it did the 9.6 first. if it was slipping (ie. being pushed up into the router), then it should have been a larger error on the second cut, not the first. Anyone else mucked around with repeatability on diameters to see if it just stuffs up?