to Master-model or not? (when using PMI)

[ralinaresg]

Hello Eng-tips,

My organization is looking to leverage PMI more. One annoyance that I have bumped into is the issue with the "custom views" not showing in the slave drawing parts unless you make them in the slave's modeling environment. This applies to exploded views of course, but seems to also be the case for PMI section views. I know this was a deliberate decision from Siemens a few NX versions back (NX 8 I think, but can't remember exactly) but I forget the motivation.

Ideally we want to contain all the PMI inside the master model, together with all its features. It makes sense for an engineer to size a bearing bore and include the fit needed in that particular feature for the part to work properly, rather than to switch to a slave model to include this information. This workflow is why we are so interested in PMI. We understand that it would require part revisions due to a tolerance change, but again, this makes sense to us.

Now, in its current state, this would mean that we couldn't make drawing slaves, which is a practice that we have held for a long time. This means that if we would like to control drawing changes on how the part is presented or drafted (but no actual design change) we would need to rev the part instead of a slave file. This is very undesirable and doesn't make much sense.

Is there an intended workflow? The best reference I could find in the forum is a few years old and incomplete.

https://www.eng-tips.com/viewthread.cfm?qid=373878

How is your organization managing this?

For context we are using Native NX12. Maybe Teamcenter makes this manageable?

 

[Toost]

When you place your views, do you "select part" in the top of the add base view dialog , or do you simply click "Add base view" and then without touching anything in the upper part of the dialog go straight for the "Model view to use" button ? ( The master model should be selected by default )
You should see the PMI views if you keep your fingers off the part-selection since it defaults to the master model.

The exploded views are a bit different, since an explosion will actually create a set of copied solids in the work part.
instead of showing the properly assembled solids NX will hide these and show the exploded copies.- The exploded view will have that setting.
and, i guess, that the reference set mechanism filters these exploded solids out.
( this is the simple background method to create a exploded view in a cad system.)

Regards,
Tomas

 

[ralinaresg]

Hello Tomas,

When doing a slave drawing model I will keep the selected master models which is selected by default. Given that we typically don't do PMI this tends to be sufficient. Not just from a callout point of view, but also section views. I understand that in NX you MUST do the exploded views in the drawing part file. I understand your explanation and makes sense. I get the sense that when doing a PMI section view NX does the same (this is reinforced do the the graphical interface flickering) in the sense that NX is creating new bodies for this view. The problem is that, unless I am doing something wrong, I must do the PMI section views in the drawing par file. This issue is my concern.

Best,

Rodrigo

 

[ravi369me]

Hello Ralinaresg,
I also have some issues with PMI which we are using for MBE with NX12 version.
Still facing problems with assorted PMI objects, some PMI symbols(PMI circular region and cutting plane) won't generate, section geometry wont generate when importing the model from STEP or JT.
Let me know if anyone have best practices to share.

Regards,
Ravi