The Undercut parameter controls the tool motion when an undercut or groove exists along the chained contour. The definition of undercut depends on the view along the cut direction. The part of a groove you cannot see when you look at the part contour in the cut direction is an undercut. The part you can see is not an undercut.
When the Undercut parameter is set to Yes, SURFCAM cuts a part of the undercut. SURFCAM cuts the amount the tool size allows. When the Undercut parameter is set to No, SURFCAM ignores an undercut along the chained contour.
