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Loft Issue
![michael_fuller](https://cad.onshape.com/images/placeholder-user.png)
Bare with me. I'm struggling to loft between a couple of adjacent shapes, closing the gap between the white shape and the orange shape and blending it to the light blue:
![](https://us.v-cdn.net/5022071/uploads/editor/bi/rri0zct3miho.jpg)
I'm using two sketches and a edge (the curve) as the guide
![](https://us.v-cdn.net/5022071/uploads/editor/n4/14viabp6rfyn.jpg)
And I get this result, which is actually fine. But...
![](https://us.v-cdn.net/5022071/uploads/editor/cy/up1g9lgtlkmb.jpg)
Hiding some of the adjacent shapes, and then looking at the "back side"...
![](https://us.v-cdn.net/5022071/uploads/editor/nr/2ynmtjuhx2ac.jpg)
I see this. This "ripple" causes issues when booleaning/union everything together as I then run into the ole "non-manifold body" failure. But regardless of that, it isn't right and I want to correct it, and I'm fairly sure when I do the other issue will go away.
![](https://us.v-cdn.net/5022071/uploads/editor/4x/8qcrsh8dm9uw.jpg)
![](https://us.v-cdn.net/5022071/uploads/editor/hf/y9h0dyttvq85.jpg)
So I went in and thought, oh, easy fix, just sort out the connections as clearly there's some confusion...
![](https://us.v-cdn.net/5022071/uploads/editor/lc/y71kfc40cimq.jpg)
But when I select the related vertices, the loft fails.
![Image: https://us.v-cdn.net/5022071/uploads/editor/9j/avprogyq1vec.jpg](https://us.v-cdn.net/5022071/uploads/editor/9j/avprogyq1vec.jpg)
So I'm clearly missing something.
![](https://us.v-cdn.net/5022071/uploads/editor/bi/rri0zct3miho.jpg)
I'm using two sketches and a edge (the curve) as the guide
![](https://us.v-cdn.net/5022071/uploads/editor/n4/14viabp6rfyn.jpg)
And I get this result, which is actually fine. But...
![](https://us.v-cdn.net/5022071/uploads/editor/cy/up1g9lgtlkmb.jpg)
Hiding some of the adjacent shapes, and then looking at the "back side"...
![](https://us.v-cdn.net/5022071/uploads/editor/nr/2ynmtjuhx2ac.jpg)
I see this. This "ripple" causes issues when booleaning/union everything together as I then run into the ole "non-manifold body" failure. But regardless of that, it isn't right and I want to correct it, and I'm fairly sure when I do the other issue will go away.
![](https://us.v-cdn.net/5022071/uploads/editor/4x/8qcrsh8dm9uw.jpg)
![](https://us.v-cdn.net/5022071/uploads/editor/hf/y9h0dyttvq85.jpg)
So I went in and thought, oh, easy fix, just sort out the connections as clearly there's some confusion...
![](https://us.v-cdn.net/5022071/uploads/editor/lc/y71kfc40cimq.jpg)
But when I select the related vertices, the loft fails.
![Image: https://us.v-cdn.net/5022071/uploads/editor/9j/avprogyq1vec.jpg](https://us.v-cdn.net/5022071/uploads/editor/9j/avprogyq1vec.jpg)
So I'm clearly missing something.
0
Comments
Best way is to avoid 3 sided surfaces. Or you can try to use other surfacing tools as for example "fill"
https://cad.onshape.com/help/Content/fill.htm?cshid=fill
Part of the challenge here is that you're trying to make a three-sided surface. Think of NURBs surfaces like a rectangular sheet of rubber or a wire mesh. They don't like to have one side be squished to zero. As @Urs_Egger_REACT said, fill may be a good option as it overbuilds the surface in a regular 4-sided way and then trims it to 3-sided. The other solution, if your design allows, is to change the corner so it has a small fourth side.