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NX drawings: specification vs. item

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

We are currently in the process of evaluating TC for the company; we have a test environment set up. From what I have read in other threads/sites, it seems there are two schools of thought concerning saving NX drawings. One method is to save the drawing as a specification which then lives in the same item alongside the model. The other method is to save the drawing in its own item. We would like to rev the drawing separately from the model, so we are leaning toward individual items for the model and drawing.

 

However, we don't know enough about how TC works to commit to this method just yet. What are the pros/cons of each method? Experienced administrators: knowing what you know now, how would you set up a new site?

8 REPLIES 8

Re: NX drawings: specification vs. item

Siemens Phenom Siemens Phenom
Siemens Phenom

Scott Pigman on his PLMDojo.com website gives a great explanation of the pros and cons of various drawing management methods in Teamcenter.

 

http://plmdojo.com/datamodel/store-drawings-teamcenter/#.VwvuLphf1D8

 


Larry Carpenter, P.E.
CAxPLM Architect @ Siemens Molecular Imaging
Past Board Member @ PLM World, Inc,

Re: NX drawings: specification vs. item

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

Thanks Larry. That's the best source of info on the subject that I've seen so far. I'm reading (and re-reading) the article, however I still have questions.

 

It sounds like if we want to rev the drawing separate from the model, we would need to go the separate item route, correct?

 

Also, someone in the comment section mentions that if the model and drawing are in separate items, the metadata may get out of synch. Coming from native NX, I'm not sure what metadata gets saved with the item in TC and how much of a headache does it create when it gets out of synch? It is this type of situation that worries me. We are making a decision, essentially ignorant of its ramifications, that will affect our operations for years to come. Are there other 'gotchas' if we separate the drawing and model?

 

Also, I should mention that the current test install is the 'rapidstart' version. From what I've seen so far, the rapidstart version seems to support either method of working. If we deploy a rapidstart install, will it place limitations on working with separate drawings/models?

Re: NX drawings: specification vs. item

Siemens Phenom Siemens Phenom
Siemens Phenom

"It sounds like if we want to rev the drawing separate from the model, we would need to go the separate item route, correct?" - Yes.

 

If drawings and models are in separate Items then you have to manage the models and drawing separately which includes attributes, naming/numbering rules, release procedures/worfklows, etc. 

 

The biggest pitfall that I see is the inability to open an assembly and all of it's components related to their released drawings if you do not have them paired together in the same Item.  You may have lists and lists of released drawings but no official and synchronized 3D CAD model structure to match it.


Larry Carpenter, P.E.
CAxPLM Architect @ Siemens Molecular Imaging
Past Board Member @ PLM World, Inc,
Highlighted

Re: NX drawings: specification vs. item

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

Thanks, Larry.

Good points that I'll mention to my team members for discussion.

Re: NX drawings: specification vs. item

Creator
Creator

Specification vs. Manifestation.

 

I've found a basic description on this help site but does anyone have a concrete example of difference between the 2?

Also, how do I check from teamcenter, which type my PDF export is?

I've seen IMAN_Specification and IMAN_Manifestation thrown around in other posts, but I can't seem to find it anywhere.

 

https://docs.plm.automation.siemens.com/tdoc/nx/11/nx_help#uid:save_as_non_master

Re: NX drawings: specification vs. item

Solution Partner Esteemed Contributor Solution Partner Esteemed Contributor
Solution Partner Esteemed Contributor
The IMAN_specification and IMAN_manifestation are relations in Teamcenter so are in the Tc Help collection. Which is used with drawings is really dependent on which Master Model approach you have elected to use. For instance, the first NX dataset is always a UGMASTER which carries the IMAN_specification relation to the Item Revision. The second and additional dataset(s) added to an Item Revision are either UGPART or UGALTREP which carry the IMAN_manifestation relation by default.
https://docs.plm.automation.siemens.com/tdoc/tc/12.2/help/#uid:genid_relations_183_6314

Randy Ellsworth, Teamcenter Architect, Applied CAx, LLC
NX 11 | SW 2016 | Creo 4 | TcUA 11.4
Evaluating: AW 3.4

Re: NX drawings: specification vs. item

Creator
Creator

I did finally find the item revision in "Related Datasets" shows whether it is Specifiactions or Manifestations.

 

My question now is if I have a PDF as Manif. and a PDF as Specif. what is the functional difference?test.PNG

Re: NX drawings: specification vs. item

Solution Partner Esteemed Contributor Solution Partner Esteemed Contributor
Solution Partner Esteemed Contributor
You can also view the relations from the Details tab after selecting the Item Revision (instead of the Summary tab).

Any specification is automatically attached as a target in the workflow. Other relations, including manifestation, are not attached unless specifically assigned using EPM-attach-related-objects
https://docs.plm.automation.siemens.com/tdoc/tc/11.2.3/help#uid:xid1256819:index_workflow_designer:i...

Randy Ellsworth, Teamcenter Architect, Applied CAx, LLC
NX 11 | SW 2016 | Creo 4 | TcUA 11.4
Evaluating: AW 3.4