Assembly display issues of Light Weight Reps Linked Bodies 1

[SiW979]

1.
We have an assembly that contains many parts and sub assemblies. I have been encouraging our users to use Lightweight Reps when working with large assemblies, however one of the sites reported that when they open the assembly with light weight reps on, it does not display all the parts. However when we change a component that is not displaying to exact, it suddenly appears and then disapears when it is changed back to lightweight. I have looked at a number of offending components and all have perfectly good JT's attached to the relevant revisions so I know that isn't the problem, is there a setting somwhere?

2.
In the same assembly, there are some componets that contain linked bodies if we make that part the work part and look in the PNT, the 4 linked bodies are there, however you cannot see them on the screen until you suppress and then un supress them which has to be done every time the assembly is loaded.

Any help would be greatly appreciated.

Best regards

Simon NX7.5.3 - TC 8

http://www.jcb.com

 

[uwam2ie]

I thing it is a NX4-NX7.5 migration problem, have you refiled your data?

 

[SiW979]

We were advised against refiling due to the size of our multisite company. Basically we have 22 sites around the world and the issues that can arrise from doing a refile when you have a single part that is owned on 1 site yet is replicated to many can be catastrophic so Siemens told us not to.



Best regards

Simon NX7.5.3 - TC 8

http://www.jcb.com

 

[JohnRBaker]

First note that simply having a "perfectly good JT's attached to the relevant revisions" has nothing to do with whether a lightweight representation is available or even usable inside of NX as what you're seeing on the screen while in NX is NOT a JT model but rather the 'lightweight representation' of the NX Component. Granted, the creation of that lightweight object is done using the same tools as what was used to create the JT, but just because one exists does not automatically mean that the other does as well. Starting with NX 7.5 you can think of the lightweight representation as being an integral part of the definition of the solid/sheet body itself which makes-up your component part, something like in the past a body carried with it as part of it's definition, the ablilty to see it represented as either a wireframe or as a solid. Well, now think of each body as having THREE inherent sets of displayable data, wireframe, exact solid, lightweight representation.

Now as for your not running refile, in the case of moving legacy data into NX 7.5, due in many respects to the changes made in lightweight representations, it's highly recommended that you perform a full refile on ALL of your parts including any reuse library parts or family table members which might be included in any of your assemblies. If you don't, besides the impact on file opening times (as all of the schema updating is being done on-the-fly every time), there are some special issues with respect to how lightweight representations are displayed, particularly when it comes to creating drawings of assemblies which include lightweight representations (note that this has nothing to do with using facets while in a Drawing but rather how the lightweight representations are interpreted as exact representations in the Drawing views so that things like Hidden Line Removal gives the results that you expect). If you look at the refile options for NX 7.5 you will see a couple of additional ones related to lightweight issues and we recommend that you set at least one of them during refile. These update issues CANNOT be handled during an on-the-fly update alone. It requires that the part file actually be SAVED before the lightweight representation can be fully usable everywhere they're relevant during a session of NX, hence the recommendation to do a full refile.

Anyway, I hope this explains why it would be in your best interests to perform a full refile, even if this has not been a normal part of your past version-up procedures.

John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA

http://www.siemens.com/plm

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