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pimm15-Moonstone
15-Moonstone
October 22, 2013
Solved

Geometry overlap issue

  • October 22, 2013
  • 40 replies
  • 25774 views

I am in the process of importing Reference Models into a Mold model.

One of the models that I am trying to import comes up with the error "Feature aborted. Geometry was overlapping."

The model that I am trying to import includes a couple External merges which are merged together in that file.

Initially this model had some tiny edge Geometry Check issues which I resolved. I see no other issue showing up with this model.

There is another reference model which was created the same way that I have no trouble bringing into the Mold model.

Is there anything in specific I should look for that might be causing the geometry overlap issue?


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Best answer by Patriot_1776

@Paul: First, you must enable absolute accuracy in your config.pro file. Then you must go into all the models in question and change the accuracy from Relative, to absolute with the same settings for each/all model(s). The config setting just ALLOWS you to later change that type of accuracy, it does NOT actually change the models.

Now, if you want, you can change your start part to have an absolute accuracy of a certain value, and that will do what it sounds like you want and have every model compatible. The caveat is that setting a low value for absolute accuracy increases file size. So, we use it ONLY where it's needed. For really complicated surfacing shapes or if I'm going to be doing merges etc., I'll set it to an absolute .00001 right off the bat. For simple stuff, I'll leave it at the default relative accuracy.

40 replies

TomD.inPDX17-Peridot
17-Peridot
October 22, 2013

You might be dealing with accuracy settings. It could also be that exported models should be checked before importing them. Or are you talking merging native models?

Of course, you could be dealing with a tangency issue.

Can you share the model(s)?

Patriot_1776
Patriot_177622-Sapphire II
22-Sapphire II
October 22, 2013

To further explain what Antonius means, all the models that will be merged etc. should have the same absolute (not relative) accuracy, probably .0001 or smaller (.00001 etc.).

HugoBarosa1-Visitor
1-Visitor
October 23, 2013

Hi!

Try this:

Export a flat surface and import it to a new part with 0.001

On the new part Edit definition of the imported feature, Options, Add from file, choose your file and do ok.

See if that works

pimm15-MoonstoneAuthor
15-Moonstone
October 23, 2013

Hi Hugo,

I have a few questions before I try this.

When you say "Export" a flat surface, do you mean Export as an IGES or STEP? The models I am trying to import into the Mold model are the standard .prt files.

When this model gets imported into a new part do you change the accuracy in the "Prepare" option area? Should this be defined as Relative or Absolute? Would the new part happen to be the Mold model that I've been trying to import into?

So, correct me if I'm wrong. You would import the flat surface 1st; then you would import the model that I've been unable to through the Edit Definition option?

HugoBarosa1-Visitor
1-Visitor
October 23, 2013

Export iges or step, same thing

After importing the falt surface change the accuracy to absolut 0.001 and yes this part is your new part.

Yes import the file inside imported feature ( edit definition ).

pimm15-MoonstoneAuthor
15-Moonstone
October 23, 2013

The accuracy settings are quite confusing to me.

I've had my configuration settings with Absolute Accuracy Enabled for a long time.

When I look at the model files in question I see that the 2 files that I need to import into the die have relative accuracy specified in the properties instead of absolute accuracy. The tolerance shown is .0012.

In looking at the die model file I see that Relative Accuracy is used, and the tolerance shown is .0026.

I have not specified accuracy when I have created any of the model files yet there is a difference.

The strange thing is that one of the model files with the .0012 relative accuracy imports into the .0026 absolute accuracy model, while the other model file with the .0012 relative accuracy does not import.

I'm not sure that this is what is causing the failure but I would like to understand why Creo sometimes would build a model with relative accuracy and the other model would build it as absolute accuracy. I have Absolute Accuracy enabled so I would have thought all models would be created this way.

HugoBarosa1-Visitor
1-Visitor
October 23, 2013

I had that problem too, please try my option and give me feedback

pimm15-MoonstoneAuthor
15-Moonstone
October 23, 2013

It might be helpful if I attach a screenshot with the error message in the context of the import.

GeometryOverlap.JPG

HugoBarosa1-Visitor
1-Visitor
October 23, 2013

First create a part file then assemble to the manufacturing assembly

pimm15-MoonstoneAuthor
15-Moonstone
October 23, 2013

Hugo,

I appreciate your help, but I just can't follow the steps that you've suggested. Even if I import a .prt file as a reference instead of an IGES I can not change the model that get's imported.

All options to re-channel the imported part file are greyed out. I've tried this through the import feature directly as well as the dropdown External Merge. It appears you are just stuck with the reference model that gets imported.

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