I made a simple square toolpath using Cut2D(Victric) software to test my CNC machine. Test conditions are followings.
I tested two feedrate overide (FRO) percnetage, 50 and 100%. On each conditions, the groove width (52 mm) was bigger than the endmill diameter (50 mm). I didn't see the differene of sharpness of edges. I believe the machining result was independent of the FRO.