Welcome to the Onshape forum! Ask questions and join in the discussions about everything Onshape.
First time visiting? Here are some places to start:- Looking for a certain topic? Check out the categories filter or use Search (upper right).
- Need support? Ask a question to our Community Support category.
- Please submit support tickets for bugs but you can request improvements in the Product Feedback category.
- Be respectful, on topic and if you see a problem, Flag it.
If you would like to contact our Community Manager personally, feel free to send a private message or an email.
Help with loft
brian_clark715
Member Posts: 4 ✭
in Drawings
I am really struggling with a loft. I am new to OnShape, and could use some help with loft. I am trying to loft from rear Canopy to rear Fuselage and it won't render. I am trying to loft from a drawing with 5 vertices to a drawing with 4. The idea is the 'top' vertex on rear Fuselage would be used to connect twice. I've tried many different ways to complete the loft and none of them work.
Any help would be much appreciated.
Tagged:
0
Comments
If this is the shape you're going for, you can make it as seperate surfaces, but you can't make it as one because you have non-manifold geometry at that point on the right.
yeah, the surface has no clue how to resolve if it touches itself in a single point only. so that's where the trouble is.
If you do only half of the plane, it's not problem. if you mirror that surface, it won't unite to its original, for the same reason.
but if you then add the top to close it over a line, it works fine:
Either way it would be wise to draw only half the plane and mirror it at the end. Saves both you and the server a lot of work resulting in better and faster models.
Just make sure when you set the center lines as guides you choose the 'normal to guide curve' constraint, so it'll be tangent to itself after the mirror.
Just as a point of clarification, the loft is perfectly happy to have a vertex as a profile. This is degenerate, not non-manifold situation.
Thanks for the input! I appreciate it as a newbie with Onshape!
Keep in mind that degenerate points in surfaces may be ok for some operations, but if further downstream in your model you add thickness or fillets, you may end up causing yourself a lot of grief. Just something to be careful with.