I purchased a Nardini Fast Trace with a Fanuc 20t controller. When I make cuts only using the X or Z axis, I get a good surface finish. But when I try to cut a taper or arc, the surface finish is in the needs improvement. This happens when I run it in conversational or when I use G code. My best guess is that the servo parameters are not well matched. Does anyone have servo parameters for a 1998 (or close to 1998) Nardini Fast Trace with the Fanuc 20t controller?