Exercise: Extrude a profile
Open the file CrossSections.3dr.
This file contains a theoretical section as well as the neutral axis of a tunnel.
Show only Neutral axis and Theoretical section.
Select the Theoretical section and go to Profile along a Path. Click on a point on the neutral axis. Unselect all the options and click Preview. The result is not as expected because the profile has moved along the path but it has not turned with the path (only translations). Select now the option Turn with the curve and click Preview again. A theoretical tunnel is now created as expected.
Note
The option Close extremities will close the two holes at the beginning and at the end of the extruded mesh.
The option Make perpendicular to the path will move the profile in order to be perpendicular to the first path vector (not necessary here as the section is already perpendicular to the neutral axis).
Extrusion along a path