This is how to looks whole thing:






What about that ReSurf? Is it same conversion from poly to subd as in Moi3d or maybe better?

http://www.resurf3d.com/Objmesh2solid.htm

Hi mdesign, what about these areas here, are they part of what you are trying to convert? Because those areas do not have a sub-d topology structure to them:



When you do the conversion into MoI make sure you are not including those non-sub triangle mesh areas and also make sure you're exporting the level 0 control cage for your sub-d objects and not a mesh that has subdivision applied to it instead of just the control cage.


> What about that ReSurf? Is it same conversion from poly to subd as in Moi3d or maybe better?

I think it's a pretty different process, if I remember right it's more like retopo where you sketch out some patch boundaries along a polygon mesh (not sub-d just a plain static triangle mesh) and it fits surfaces to the polygons. I haven't looked at it for quite a while so it may have more functionality now like some kind of auto re-topo stuff in addition to manual topology tracing.

The MoI converter is for sub-d only and exactly converts the limit surface of the sub-d model to NURBS surfaces.

ReSurf could be good for those non sub-d triangle meshes indicated in the above arrows. You should not be running non-sub-d stuff like those through the Moi sub-d converter.

If you want to e-mail the .obj file to me at moi@moi3d.com (using some file transfer service, like dropbox, wetransfer, etc...) I could take a look at it and maybe give you some ideas on what things are problematic.

- Michael

Thanks Michael I will send it to you but I should prepare it before because it`s not prepared to imitate a real problem. I need to change cutters. It takes some time (I`ve already tried this few months ago). Some cutters are not in subd because my production was pure polygonal. I need to change it and then I will try to do that test properly. Next I will send it to you. Thanks it`s very kind that you want to look at it.

Those triangles is a background scan :) (it`s not related with import subd meshes to MoI)

From that site it looks that is a rather subd conversion to cad than triangle mesh 2 cad: http://www.resurf3d.com/Objmesh2solid.htm (please look on images).

Thanks for all info. Thanks Michael also for that Rhino plugins link.

Objmesh2solid is not a reverse engineering tool. It is useful for less precise conversion only and will not produce accurate results compared to the original mesh data.
Quoting from the product description:
"the NURBS surfaces here do not fit to the OBJ mesh"

I`ve understood that quote as: Subd always does not fit to unsubd mesh. Subd is smaller.

I have resrf3d.... it is more of a "drape" surface.

If you want to see its results, i'll run it through for you.

I also have a cnc software if you want me to look at toolpathing it too

Thanks,
have you heard about http://www.grzsoftware.com/ MeshCAM software. I`ve heard that is good for STL milling. Is that true?

I won`t bother you with that. It`s nice to have your opinion (as an user).

Yes, have known a little about meshcam.

Nothing wrong with it. It's an affordable, simple toolpather.

Nothing about what i have been discussing is really "software" specific....

OK, thanks, understood.

Hi mdesign, I think you're probably running into some of the same stuff we discussed previously here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=9541.4

I would think you should be able to boolean stuff with tightly bent corners like that but it's pretty unlikely that calculations involving surface offsets (which includes filleting) is going to be able to cross over such tight bends in small concentrated areas like your geometry has.

That's more related to those kinds of shapes being difficult to process, not exactly whether it was created in sub-d and converted to NURBS or modeled in NURBS initially.

If you built something with those kinds of tight bends in it directly in NURBS you'd see the same kind of problems.

Typically in CAD those smallest tightest fillets are added in at the end, you usually don't want to have them baked into your geometry already and then try to do filleting or shelling on top of those.

- Michael

Thanks Michael. Sorry for doubling posts. I'm spinning around.