It sure seems as if JoinEdge is best avoided like the plague, maybe the command needs a red colour to the lettering.
Some forums have a sticky section, the advice on join edge and how best to join surfaces and avoid trimming if possible to surfaces, deserves a sticky !
best practice…I wonder on the following.
If I have need to trim a surface, should I recreate the trim edge as a new curve and which is the best way to do that, DupeEdge or RebuildEdges ?
Then sweep the surface all over again using that edge and the other three existing edges, which might also need recreating unless I can find the original sweep paths and profile ! and is such asking for even more trouble ?
Is that best practice and should it be DupeEdge or RebuildEdges, latter might just alter the exact curve as it has values that one can vary ?
I find the concept of avoiding TRIM difficult, here is an example…
I have created a shape made of a patchwork quilt of surfaces. In a couple of places I have a compound curve organic sort of shape sitting on the surface, its edges are meeting the surface, having been projected to surface during its make.
So as to join all my surfaces together to make a solid, I decide this organic shaped surface needs the smooth surface under it cutting away. Is that correct, or can a solid have such a surface shape sitting on another surface ?
Think of it as aires rock in australia, should the surface under the rock be cut away ?
I elected to use trim command and use the edge of the ‘rock’ to trim a hole in the surface (land) then selected all surfaces in my model and went ‘join’. I have a solid, but with something denying a dxf solid make, turns out to be an upset caused by trimming the smooth surface under my aires rock sort of shape.
patching it up is not easy. Its risen up like a paving stone at one edge, a very small distance indeed but causes export problems. I am told to use untrimedge to solve the gap issue, and that recreates the entire surface again under my shape, so how can I then accomodate this shape as part of my solid ? When I trim the surface I am recreating the cause so it seems.
attached the file of this part of the model, before (with glitch causing naked edge to be shown, and dxf export solid failure), and after untrim edge applied.
UntrimEdgeRecreates former surface denying solid make.3dm (553.4 KB)