Min. profile diameter

The diameter of a profile is its "span", which is the largest distance between two points of the profile. Any profile that is smaller than this value will not be machined to avoid difficulties in ramping the tool into this space. The default Min. profile diameter value is slightly less than that of the flat part of the end mill tool (and zero for ball-nosed tools).

For example, if the set of surfaces has a hole about the size of the tool you want to use, you will get a column of profiles that appear to "fall" through the hole down to the lowest Z level. If you do not want these profiles, you can use the Min. profile diameter parameter.