While making .stp or .igs files from Creo .asm file how to avoid data loss problems.

[VinitKadamITT]

Hello Creo Community Team Members,

While making .stp or .igs file from Creo .asm file how to avoid data loss problems like surface losses, solid part become surface part.

I am having Creo .asm file, all the parts in that assembly are solid parts (here I mean to say, when I take section , it looks all the parts are solid/filled, no any hollow portion);

& when I save my assembly file as .stp & reopen that file in Creo & then I have taken the section it looks OK, means all the parts are inside solid/filled;

BUT when I open .igs file, it took long time to open & when I have taken the Section, it looks hollow part.

Please send me idea/tricks/standard procedure to avoid data loss problems while exporting Creo files to .igs or .stp files.

Thanks & Regards,

Vinit Kadam

ITT Corporation India Pvt Ltd.

[JonathanHodgson]

My understanding is that IGES and STEP formats contain surface data only.  When you import one of these files, Creo takes the surfaces and converts them into a solid if it can find a solid volume.

However, if there are any errors in the translation process, the surface model may have small gaps, overlapping surfaces or other problem which prevent Creo detecting a closed volume, and so it doesn't automatically solidify.  If you modify the surfaces, either by manually creating surfaces and merging, or using Import Data Doctor, you can often then add a Solidify feature to end up with a solid component.

In some cases, simply altering the accuracy of the imported model may be enough to allow it to solidify.

In general I believe that STEP is less prone to errors than IGES, but I've often seen problems even with STEP when exporting / importing between two different CAD systems (Creo and Catia don't seem to play well together).  I'm surprised that you're getting problems re-importing a Creo export, though.

What is your default accuracy setting?

[lbombolowsky]

IGES is no more the Automotive Best Practice... currently it is STEP AP 214 and somewhere (VW, Daimler) it is JT.

ProSTEP iViP Association | Best Practices