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Concentric constraint difficulties

Genius

Hello,

I suspect this will be an easy issue to solve, but I'm a relative newbie to NX so forgive me! I am currently doing a job where I need to frequently apply concentric constraints to align parts. When applying a concentric mate in SolidWorks, my usual software, selecting either circular edges, faces or axes would yield the same result - that is, aligning the components together such that they are free to move along the common axis.

However, in NX I am finding that I am unable to select circular faces to define concentricity; instead I can only select the circular edges of two parts. However although this does provide concentricity, it also seems to cause the constraint to touch the two edges together, meaning that I can't put a gap between the two components.

From my limited training I remmeber being able to align axes together to provide concentricity; I believe this would provide the simple concentricity I am looking for. I know how to apply datum axes to a part, but displaying these in an assembly is beyond my abilities.

So, my questions are as follows;

- Is it possible to use faces/edges of parts to provide *only* concentricity between two features

- If not, how would one go about showing datum axes in an assembly for use in a concentric constraint?

I've done my best to explain the issue but I realise it might be hard to understand, so I'll be happy to explain further if needed.

Cheers,

Alex

2 REPLIES

Re: Concentric constraint difficulties

Gears Esteemed Contributor

If you want to align the axis of one part to the axis of another, use the touch align -> infer center/axis constraint. You can then apply a touch align constraint if you want the parts to be in contact, or use a distance constraint if you need a gap between them.

Re: Concentric constraint difficulties

Genius

Ah, perfect, I knew there would be an easy way to do it - I think SolidWorks has narrowed my approach to NX..!

Cheers,

Alex