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Inoram14-Alexandrite
14-Alexandrite
September 13, 2013
Question

Import geometry fixed but still can not cut out

  • September 13, 2013
  • 2 replies
  • 3453 views

I have a new project with some import geometry that needed some fixing before getting it solid, I did that. Then I assembled it into the middle of a cube and tried to use it as a cut out, this is how I test geomtery before I try to use it in a full design. But it doesn't work, the cut out fails. This is also with all the same absolute accuracy set (both parts and the assembly), and I tried different accuracies. I also tried to copy all the surfaces and use Solidify, but this is probably the same thing as a cut out as far as the engine is concerned.

What other ideas do people have for handling this? Previously I have remodeled parts from scratch. Or sometimes cut out certain areas that cause problems and remodel them back. I have also re export/import in different formats.( I haven't tried that yet on this one.).

thanks

Matt


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2 replies

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TomD.inPDX17-Peridot
17-Peridot
September 13, 2013

If you are getting a successful solid then perseverance is the only way... and then you go to a customer support case.

There are several ways to get to the bullion operation. I don't know if they are different algorithms. Which one are you using?

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Inoram14-AlexandriteAuthor
14-Alexandrite
September 13, 2013

Component > Component Operations > Cut Out

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Inoram14-AlexandriteAuthor
14-Alexandrite
September 13, 2013

And then try to fix the import on a tigher accuracy and get to this stuff. Things like this seemed easier to fix in earlier versions of Pro. I mean, I sure I haven't mastered the new IDD stuff yet, but it seems like there is just less options to fix stuff.

nicesurface.JPG

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TomD.inPDX17-Peridot
17-Peridot
September 13, 2013

Yes, I've had this happened to splined edges. I have even submitted support cases where little has been resolved. Recently in Creo 2.0 M040, I had this issue with the Volleyball I made where I projected a sketch onto a surface and trimmed to that feature. It failed miserably with similar results as you are seeing when I tried to thicken a surface.

I suspect you are on the right track with accuracy settings but it doesn't make for good geometry, it only manages to fail less. Maybe the advanced surfacing extension has better control over these types of features with some more forgiving algorithms, but with core Creo, I am not impressed with the performance of complex edges. Either something is wrong with the code, or the implementation is less than stellar.

I highly recommend you provide this to PTC as a customer support case. We really need to see some reasonable resolution to this type of error without having to resort to optional extension modules. This is particularly the case with imports since we don't have the option of pursuing the desired geometry in a different manner.

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TomD.inPDX17-Peridot
17-Peridot
September 13, 2013

This is the other method by using the merge/inheritance feature. I'm sure it is the same but worth noting.

You activate the part you want material removed from then navigate as shown in the image.

Good luck!

merge_inherit.png

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