Doing Edge Blend on Convergent Bodies

[MartinH]

Hi,

I imported a STL with two Bodies and try to do an Edge-Blend or Face-Blend but cannot do this. The edge and faces are not selectable. Does someone know if this is possible and, if yes, what I need to do?

Thanks,

Martin

[TimF]

@MartinH

The reason you cannot select faces or edges is because STL bodies are faceted bodies and do not have actual faces or edges - so you're using the wrong types of modeling tools.

I'm sure someone else with more experience/knowledge about faceted/Convergent modeling might chime in, but in the meantime I'd suggest reading the Help Docs for what you can and cannot do with faceted and Convergent models in NX.

[ScottFelber]

In NX 12 you can use the command called Create Transition to add "edge" treatments to a Convergent body. As state above there are no real edges on the part it is only facets. 

Scott

[jerichotjia]

Hello Scott,

So that means in NX 11 one cannot blend the sharp edges of a convergent/facet body since this Create Transition command is only available in NX 12?

Jericho

[TimF]

@jerichotjia,

If you do not have the command Transition available in NX11, then it must be a new command for NX12. This happens from time to time when new capabilities are added to NX - not everything can be added at once all of the time.

Convergent modeling is new to NX and it's not the same thing as modeling a traditional model. Convergent models are still faceted and are approximations of the original traditional model. While you may be able to use some traditional modeling commands to apply features to a convergent model, there are some commands that will never work exactly like many users will more than likely assume. Faceted modeling will always be a bit different than traditional modeling - no true edges; the ones that are there won't be tangent so blending will be next to impossible anyway (think of trying to blend around a Hole edge) and faces are nothing more than approximated planar faces.

[ScottFelber]

Yes that is correct, the add transition command for convergent bodies was added in NX 12. 

Also check out this video around the 7:00 mark.

NX 12 Create Transition

Or this one around the 3:00 mark. This one has some great commands to work with Convergent Bodies.

Convergent Modeling in NX 12

Scott

[jerichotjia]

@TimF & @ScottFelber

Ah okay, thank you for your fast replies & references!