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J
JT_OConnor8-Gravel
8-Gravel
August 21, 2025
Solved

What config.pro option causes Creo to perform a preliminary Mass Props calculation for every part?

  • August 21, 2025
  • 2 replies
  • 1766 views

I feel like Creo is slowing us down when opening an assembly, particularly large ones, because it is "Doing preliminary Mass props calculations" on every part it opens.  I'd rather do that manually and save time opening the models.  Any ideas?  Creo 10.0.5.0, WC 13

Best answer by StephenW

@unknown 

The analysis feature is usually added to a part/assembly for some specific reason. You do not need it for "normal" mass calculations.

When an analysis feature is present and the part/assembly regenerates, the analysis feature is re-calculated (force recalculated is what i say, it's probably a poor way to say it). It may have been a method used by someone in the past to get a CG point/csys created or for other reasons, of which I can't think of at the moment but I remember there have been times i have used them over the years to get something specific done, but it was always for something "special".

I would say, in general, don't add a mass analysis feature to your parts/assemblies unless you have a very specific reason to do so.

2 replies

S
23-Emerald III
StephenW23-Emerald III
23-Emerald III
August 22, 2025

Try adjusting the options on:

mass_property_calculate   

J
JT_OConnor8-GravelAuthor
8-Gravel
August 22, 2025

I tried all four options, also toggled mp_calc_level between all_models and assembly_only.  All performed Preliminary Mass Properties and regenerated all models,  

 

I also then removed ALL config.pro and .sup files.  No difference. 

 

Maybe it's just the nature of the default options that Creo calculates Preliminary Mass Properties and regenerates all models, but I don't remember this previously, although I don't think I ever looked.  

S
23-Emerald III
StephenW23-Emerald III
23-Emerald III
August 22, 2025

Do you have a mass properties analysis feature added to parts/assemblies? 

I haven't seen this message and my job is primarily large assemblies. Granted I am on Creo 8 currently. I do have access to Creo+ (aka Creo 12) to test.

J
JT_OConnor8-GravelAuthor
8-Gravel
October 1, 2025

Apparently, up until recently, we had issues with units getting crossed up in our models along with Family Table instances getting incorrect mass and transferring that to the assemblies they were in.  We discovered the Unit Sensitive checkbox in Relation Tools along with the ability to identify unit quantity and Units for parameters.  Combining all these together, we now get correct Mass Properties without the need for an "analysis feature" in each model.   As we continue to update our family tables, we are removing that feature and it seems to be helping. 

 

We are now focusing on number of workspaces and number of parts in each workspace to optimize time to open.  This seems to have become worse once we moved to Creo 10 and WC 13.

 

Thanks to all who helped.

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