Part Modeling > Sketcher > Working with Sections > Tip: Dimensioning a Section to Part Edges
Tip: Dimensioning a Section to Part Edges
When dimensioning to a part edge, you must consider what type of entity the part edge is. Splines and arcs may appear in the sketching plane as straight lines to which you can dimension. But, if the plane that was used as the sketching plane is modified (for example, if the angle of a datum plane changed), the spline or arc no longer appears as a straight line. Thus, the dimensioning scheme becomes invalid, the feature cannot be placed, and the feature creation or regeneration will fail.
One way to avoid this situation is to not dimension to splines or arcs that project onto the sketching plane as straight lines. However, if the situation does occur, modify the dimensioning scheme to dimension section geometry to linear geometry. You can orient the part in an iso-type view to help you select proper geometry on the part.