The intersection curve is calculated using the surface-surface intersection technique. If you receive the message
No surface/surface intersection, then
FeatureCAM cannot determine the intersection curve for your surfaces. For additional details see
these restrictions.
If you receive the message
Can't trim, trim curve does not end on a boundary, then an intersection curve has been calculated, but it is not a valid trimming curve for your surfaces. This figure shows an example.
If you have multiple trimmed surfaces, the intersection curve must form a valid trimmed surface for each of the trimmed surfaces.
If you have selected the
Trim this surface also check box, then the intersection curve must form a valid trimmed surface relative to the trimming surface.