I machine some 4" round parts from 1.25" UHMW I am having a problem with the bit exiting after the cut and leaving a cut line in the edge. The cuts are toolpathed with a ramp going in.
I am using a 3/8" O flute bit by Onsrud made for plastic and I plunge with a 1" ramp at .03" sec and that seems to do fine it takes 3 trips around the part to leave a .050" skin all is well until the bits stops and retracts from the work and leaves a straight line as it exits. Is there a way to have it exit in a ramping motion instead of just pulling straight up?
The line is not deep but it makes the part look bad. It would be really nice if I could get the bit to jog a few thousandths away from the part and then exit.