×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Am I the only one? STP/IGES surface broken after importing.

Am I the only one? STP/IGES surface broken after importing.

Am I the only one? STP/IGES surface broken after importing.

(OP)
Hi friends,

I just want to check if anyone else is encountering the same issue or am I the only one?
I do my surface modelling in NX and made sure all surface is Sew/Join properly before saving as STP/IGS file. But when I open the file in CATIA, the surfaces were broken and I wasn't able to join them without spending some time again re-modelling it in CATIA.

Is this a common issue for you too?

RE: Am I the only one? STP/IGES surface broken after importing.

I would say about 20% of the time I do not get a solid model from nx to Catia.

Most of the time I will get the model imported as a single surface/sheet/skin/volume/etc. That will not close into a solid. I then run the heal operation and that will work half the time. I have tried to reduce the nx tolerance on export of .stp, this helps some times. Last week I exported .stp and or parasolid from nx, then imported back into nx. then stepped that out and it came into catia as a solid. Othertimes we have mirrored the solid in nx then exported .stp and it came in fine, then mirrored back in catia. And sometimes we spend hours cleaning up the gaps.

RE: Am I the only one? STP/IGES surface broken after importing.

What is the accuracy setting of NX?

In CATIA by default it is 0.001mm. Meaning if the distance between 2 points is less than that, then catia will consider the point "at the same location" you can still read XYZ with diferent values like p1 (0,0,0.000001) and p2 (0,0,0) but you can not create la line between p1 and p2.So 2 curves are connecting when the distance is bellow accuracy... same for surfaces.

So what about your file in catia? I have heard user saying catia is not good as because the step / iges import does not show a full solid / surface. In fact the problem come from the original software that is not as accurate as catia, the geometry is "loose" but it works in the other software.

So what can you do?
  • Not sure if you can change the accuracy in NX to get something as good as catia. That could help.
  • You said you are creating surfaces in NX... why not using a better software? upsidedown
  • Get some licenses in CATIA that will help with bad geometry import...
  • Try scaling up the geometry 1000 times before export, and scale down after import?


Eric N.
indocti discant et ament meminisse periti

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close