Misaligned NURB surfaces

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tocisz
Posts: 1
Joined: Wed Oct 27, 2021 6:28 pm

Misaligned NURB surfaces

Post by tocisz »

First, I think FreeCAD is all right, just I don't know how to use it...

I have a part created in other application, consisting of NURB surfaces that is supposed to be airtight. It was imported from IGES format.
But there are gaps between surfaces (see below).
Image

Image

Image

I think that one problem is that two BSplines, even with the same poles, give different shape because of pole multiplicity.
Image

Image

The other problem I noticed when zooming: looks like coordinates of poles that should match are slightly off
(see control point with multiplicity 1 two images up
and control point with multiplicity 4 on the image above)

I attach project in case anyone would like to look into it.

I believe it's the problem of the other application... but what can I do to fix this model?
Thank you for your suggestions!
Attachments
imported-nurb.FCStd
(441.02 KiB) Downloaded 13 times
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