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Out of tolerance error on Intersection Curve

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wilbert_caddy

Automotive
Jan 2, 2018
1
Hi all,

Lurked here a few times to find solutions over the past year, finally bit the bullet and joined when I haven't been able to find resolution for the last few problems. I have a little over 5 years experience with NX 7.5-9, on the brink of switching to 11 but this current issue has been plaguing me constantly for months.

I have a model that has a couple thousand features, and I have to jump around the timestamp features in the tree to perform edits on a daily basis. My issue is, if I'm working at the top of my feature tree, and jump later or to the end, I nearly always get a popup error "WARNING. Intersection curves: Out of tolerance." Not a critical issue as my model will still update all the way to the end and I can pass checkmate checks and baseline/hard release in Teamcenter no problem. It's just a frustrating issue that makes no sense because nothing actually breaks, I just get that yellow triangle and a popup. Here is just about everything I know about this error:

[ul]
[li]Happens frequently when editing with rollback (primary edit mode for me) or when making a later feature current.[/li]
[li]Even if I have more than one intersection curves feature, only one of those will fall "out of tolerance" at a time with seemingly no pattern (could repeatedly affect the same intersection curve feature every update, or affect a different one). I have never ever seen more than one intersection curves with this error simultaneously.[/li]
[li]Error resolved by editing with rollback and deselecting one of the parents and re-selecting same parent and hitting OK.[/li]
[li]Changing the tolerance will also fix it (basically any redefinition of the feature will) but the feature is still susceptible to the error in future edits, so not a permanent fix.[/li]
[li]Not fixing the error does not stop a new error from popping up when I jump around the tree again. Only a single intersection curves feature at a time will be affected no matter how many intersection curves features I have in the tree.[/li]
[li]If I use extract body/face on the parents, and then make an intersection curves out of those extracted parents, intersection curves still susceptible to this error.[/li]
[li]No gaps in curves, no changes in curve/spline geometry with this error. Subsequent features retain parents borne of this feature.[/li]
[li]While I strongly prefer the section curves operator, I need the intersection of two sheets and intersection curves is the only operator I know that can do that. Intersection curves can use sheets or planes (among others), but with section curves one parent MUST be a plane. If there is another standard operator that will get me an intersection between two sheets, please enlighten me.[/li]
[/ul]

I have a fairly large list of bonkers errors in NX, I have figured out workarounds for most of them but this one I can't seem to crack. Not sure if NX 11 will fix the issue, I'll update this post either way. In the meantime, I'd appreciate any knowledge since my colleagues have never seen anything like this.
 
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I have seen similar issues, parts where a specific feature is constantly "coughing". these cases are pretty rare but still annoying when encountered.
the only proposal i have is either delete and create a new intersection , or delete + recreate the parent of this intersection curve.

Instead of a intersection curve, trim one of the two sheets with the other and use the new edge instead of a separate curve.
( Trim body is normally quicker/simpler than Trim Sheet.)

Regards,
Tomas


 
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