Part line program is a particular kind of cutter compensation for milled features. If enabled, the actual drawing dimensions of the feature are output as the toolpath rather than the center line of the tool. The tool selected to cut the feature is still important even when using part line programming. If the same tool is used for roughing, be sure that the actual tool diameter does not to deviate far from the diameter of the tool used by FeatureCAM to ensure proper area coverage for the roughing passes. Also ensure that the diameter of the selected finishing tool is small enough to cut your entire feature. If you have selected a tool too large to fit into a tight corner, you cannot correct the toolpath with just cutter compensation.
FeatureCAM automatically calculates the entrance point of your finish pass and adds a linear move and a ramping move (based on the Ramp diameter attribute) to your finish pass to accommodate cutter compensation. If you receive a warning in the operations list such as “Can’t find ramp in/out arc” or “Can’t extend end of open profile” then correct the problem by decreasing the Ramp diameter attribute or changing the Pre-drill point.