Simple Follow Me (revolve) results in distorted Geometry

The profile I created does not rotate about the red axis correctly.
Any idea why that is?
OG Porch Stair PPW 02 test.skp (314.4 KB)

Follow Me requires that the first segment in the path be perpendicular to the profile and the extrusion will end perpendicular to the last segment in the path. Your path needs to be set up correctly.

Instead of using an arc draw with the Arc tool, start with a circle and rotate it so that edge segments are perpendicular to the profile and the desired end of the extrusion. Divide the circle to create the sector you need.

It’s important to understand that if the profile and first segment of the path aren’t perpendicular, the profile gets projected to the end of the path which means the shape is not exactly the same as the original.

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It does behave as expected…
If you want the result to be 90 degrees you have to make sure the beginning and end of your path are perpendicular to the face. A quarter circle starts and finishes at an angle! Keep this in mind when using followme.

Thanks, that was very helpful. but I can’t come up with a good way to rotate a circle so that a facet is perpendicular to the section.
I know I’ve done this operation in the past with having to do anything to the circle. Is there a simple way to get the circle in the correct orientation?

After drawing a circle on axis, you select the circle, select rotate, and start rotating from a midpoint of a segment to the axis. So in fact you rotate the circle by half a segment.

Here’s a quick demo, as described by @tweenulzeven


Thanks Box, a GIF is better than a thousand words…