What I Learned On My Summer Vacation… (Tips & Tricks from SWworld pt.3)
In a 3D Sketch create a spline perpendicular to a face.
If you just pick the SPLINE and the FACE, you get a TANGENT option. This will try to physically MOVE the spline over to TOUCH the face and be TANGENT with the face. Sometimes this is NOT what you wanted and sometimes you will end up with a NO SOLUTION FOUND problem.
More likely what you want is just for the spline to be TANGENT to the face, but not necessarily TOUCH it also…
Pick the SPLINE, the FACE, and any EDGE on the face and you will get the “hidden relation” TANGENT FACE !
You also of course get a handle that you can use to adjust the magnitude of tangency.