Any way to remove hole over a seam

Rhino
1

Nose cap for question.3dm (285.1 KB)

I understand that removing a hole over a seam has been an issue for years. I understand why.

Is there a way to move the seam in such a shell solid before a hole is created?

Is there a way to make a seam easily recognized to avoid putting a hole over it so the seam can be moved?

Is there a way to remove an existing hole over a seem in Rhino 8.

2

I don’t know if this helps or not, but running untrim works on the outer surface. You have to click edges on each side of the hole. However, it doesn’t work for the inner hole.

Other options that I can think of, but keep in mind, I worked as a jewelry designer, which I imagine is very different from vehicle/aircraft design.

  • Untrim the hole on the outer surface and use patch on the the inner hole with the “Adjust Tangency” option activated (I’m not sure how valid patch is in an engineering context…it was totally fine in jewelry mfg.)
  • Split the nose cap vertically and mirror the non-seam hole across the axis and then you can remove it (but now you have seams on the top and bottom…and this only applies if the nose cap is truly symetrical across that axis)
  • extract the outer surface, use untrim on that hole, and completely redo the inside of the nose cap (offset surface?)

And, as for moving the seam, I think you can only do that in surfaces. So you would need to move the seam before it is made into a solid (if I’m not mistaken).

3

The only way to get rid of the hole over a seam currently is to explode the shape, and use untrim.

So in this case:

  • Untrim the hole that is not over the seam
  • Explode and delete the edge surface
  • untrim the hole over the edge (needs 4 clicks)
  • Join the resulting surfaces back into a solid
4

yes. for surfaces use SrfSeam, it allows you to move the seam along the isocurve direction. you also have CrvSeam just in case.

yes, you see a thick edge at the seam. additionally you can use ShowEdges, which is a command that can stay open while you do other operations. that is only practical when you have the isocurves turned on permanently, because you can change the edge colour.

additionally to what has been suggested, after untrimming you should MergeEdge on the seam to keep it together. just in case you have to repair it.

5

@user2849, @Gijs, @encephalon

Also _ReplaceEdge works very well in situation where you want to rebuild an edge in a fast way.

Sometime the Untrim reconstruct the whole surface where, intead, you may want only to fill a single hole on an edge.