Slope Analysis - Reverse Face Normals
Slope Analysis - Reverse Face Normals
(OP)
NX 8.0.3.4
Using Analysis > Shape > Slope to check a solid model for tooling draft angle and undercuts, the results show many faces with the Face Normals needing to be reversed. Can we correct this for the entire model in one operation insted of selecting each face individually.
Using Analysis > Shape > Slope to check a solid model for tooling draft angle and undercuts, the results show many faces with the Face Normals needing to be reversed. Can we correct this for the entire model in one operation insted of selecting each face individually.





RE: Slope Analysis - Reverse Face Normals
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RE: Slope Analysis - Reverse Face Normals
It's definitely a Solid... Information > Object... Solid Body. I Analyzed the Parent Sewn surfaces that where used to create the main Thickened Body and I get a consistent result with correct Surface normals as one would expect.
The main body is a Thickened Sheet... 3mm thick with united Extrudes, thickened bodies etc.
Various features in the Analysis are shown in the attached image, I can't show you the entire part. We get the same Surface Normal prolem results on small simple Shelled bodies with united extrude features. I wasn't too worried about it personally as the Magenta / Blue told me it was the correct angle, just with reversed normals, but the Trainee Designers were pulling their hair out trying to get a correct result.
Regards
Ian
RE: Slope Analysis - Reverse Face Normals
Also, use "examine geometry" to make sure there are no errors with your geometry.
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RE: Slope Analysis - Reverse Face Normals
RE: Slope Analysis - Reverse Face Normals
Examined Geometry, it returned a Consistency error... I fixed that, re-examined... Analyzed Slope... same outcome!!!
We are a large GM Design supplier.
Using TcAE 9.1.2.6 & the latest GM Toolkit. I'm 15 yrs on UG.
RE: Slope Analysis - Reverse Face Normals
The inconsistency only seems to have begun with NX8 although I didn't pay too particular attention when it began.
RE: Slope Analysis - Reverse Face Normals
Without seeing the file, I'm out of ideas. I'd suggest sending it to GTAC for a look if needed. I understand that they have confidentiality agreements in place to handle these situations.
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RE: Slope Analysis - Reverse Face Normals
Have checked the vector may times over the weeks, had used the Absolute WCS selecting the vector and changed to the line I use for Draft direction with no difference.
Many thanks for all of your input.
RE: Slope Analysis - Reverse Face Normals
Khimani Mohiki
Design Engineer - Aston Martin
NX8.5
RE: Slope Analysis - Reverse Face Normals
Thanks again.
RE: Slope Analysis - Reverse Face Normals
Thanks to all
RE: Slope Analysis - Reverse Face Normals
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RE: Slope Analysis - Reverse Face Normals
I didn't want to say something I shouldn't.
It worked fine in NX/.5 and before.
T Erbe (says hi!) is our NX Administrator and he was just as puzzled as you. He predicted it would be that kind of reply.
Who am I to argue with GTAC..!
Cheers
RE: Slope Analysis - Reverse Face Normals
John R. Baker, P.E.
Product 'Evangelist'
Product Engineering Software
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
Siemens PLM:
UG/NX Museum:
To an Engineer, the glass is twice as big as it needs to be.