This should be simple, but I can't make it work!
I want to loft-cut a shape around a half-cylinder so that it tapers as it goes round the circular face.
SW doesn't want to complete the operation 'due to geometric condition'.
Make sure not zero geometry is getting created because of the cut. Try extending the sketch out of the edges and then do the loft cut.
Can you attach the part?
I finally got it to work, but it took me a while. Someone else could probably do it simpler and faster, but I don't work with lofts much. (I hope I didn't just do your homework for you.)
Thank you Deepak and Glenn,
You're both on the same track. Problem solved.
One thing I've noticed with a lot of lofts and cut lofts is that you often get curved shapes developing where you'd expect a flat profile.
Glenn's model shows this in the middle of the profile. Can this be fixed?
Martin Sayers Check the attached part showing how to fix the curved shape plus issues (material near the ends) due to which loft was failing for you. So extending was the correct way out.
Glenn Schroeder You can use the sketch 2 as center line curve.
Eliminate the coincident of the vertical sketch entities in your two profiles ( tangent to the sides of the half cylinder shape) and extend them beyond the solid. Because Loft is really a sweep with multiple profiles "under-the-covers", the path between the profiles is approximated so whenever doing loft or sweep, remove unnecessary "ambiguity" so that SW doesn't have to struggle to figure out what side to cut and what side to keep. In other words, try to avoid at all costs, lofting or sweeping a cut where the cut coincides with an existing model edge.
Thank you Mark, you've explained the problem very neatly.
Would it also help if I were to extend the lines out, so that no vertices coincide with the existing model edge?
Yes - that is exactly what I've describing...
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