STL not importing correctly

[TravisVanD]

Hello everyone,

I have been struggling with getting a stock model that has been exported from ESPRIT imported into Inventor. It appears to be importing as a negative of the model. I appologise if this has been discussed before, but I wasn't able to find a solution. Please see attachments. Thanks!+

Here is is in ESPRIT

Here is how Inventor imports it:

[JDMather]

Zip and attach your stl file here and I can open it in some other programs and determine if it is a problem with the stl or the translation. 

[TravisVanD]

Here is the file. Thanks.

[rdyson]

This is what it looks like in Rhino. How was it created? Attach the source model.

[TravisVanD]

Rdyson,

That is exactly what it should look like. It was generated by my cam system as a finished machined part, so I don't exactly have a source for it. Can anyone explain to me why it would open properly in Rhino or Solid Works (and even Inventor Fusion) but not properly in Inventor?

[rdyson]

Sorry, totally misread which was right and wrong.

Here's the Rhino model, if that's of any use. It should open in IV "properly" although it's 6 MB

So far as why, probably normals were confused in the stl or IV couldn't figure them our when it did the translation.

[JDMather]

I opened in Inventor 2013SP2 and 2014SP1 and it did not look correct.

I opened in SolidWorks 2012 and in Dimension CatalystEX and it looked correct.

So this appears to be an issue with the Inventor translator.

[wilkhui]

Hi Travis,

Sorry for the trouble you're having with this - I can see the same issue you reported and I've logged it as DID 1516894.

I don't yet understand why it's happening so please bear with me.

Many thanks,

Indy

[TravisVanD]

I appreciate you looking into this for me. I'm not sure if it is helpful, but here are the export settings on ESPRIT that I used to generate the STL. I tried messing with the options, but didn't have any luck:

[bob_holland]

Travis,

I used a product of ours call Meshmixer:

http://www.meshmixer.com/

and was able to import it and save it out as a Binary STL and it seem to work fine.

I have also logged this as an issue for our development team to work on.

Please let us know if your results are different.

Thank you.

[evelynyin]

Hi Travis, According to your export option, the file type should be Binary. But the file you provided are type ASCII. It seems there are something wrong with read the type ASCII. So would you please just change the export file type or convert the file to Binary and try again? Thanks, Evelyn

[TravisVanD]

Hi Evelynin, I am getting the same results whether exporting in ASCII or biary

[bob_holland]

Travis,

Did you have difficulties with the binary STL that I attached in my ZIP file?

Can you please recreate your binary STL file and post it for us to look at.

Thank you.

[TravisVanD]

Hi Bob,

I wasn't able to open the attachment. It was named as .zip.txt I'm not sure how to handle that since being a .txt file i wasn't able to unzip it. 

here is the binary I created:

[bob_holland]

Travis,

I think the issue is that your application that is creating the STL file is only producing an Ascii version:

Below is the top couple of line from my binary file that I posted:
MESHMIXER-STL-BINARY-FORMAT----------------------------------------------------    F
u>Îðʽ@Dw?›þô?F(Z¿Xéž¾§"ù?Ø]¿XÅ£¾1™þ?`vC¿XÅ£¾ÿÿÁ
u>Ö˽2Cw?1™þ?`vC¿XÅ£¾5^ú?Û6@¿Xéž¾›þô?F(Z¿Xéž¾ÿÿsœ>Iž
¾Ÿ—q?#óð?ŽV¿à´˜¾›þô?F(Z¿Xéž¾5^ú?Û6@¿Xéž¾ÿÿkmœ> ”
¾ã˜q?5^ú?Û6@¿Xéž¾Í;ö?W
=¿à´˜¾#óð?ŽV¿à´˜¾ÿÿ¯m¾>C¾¾óVj?çÆì?þÖR¿ ¬¾#óð?ŽV¿à´˜¾Í;ö?W

Here are the top couple of lines from you binary file:

solid
   facet normal 0.239264 -0.0990925 0.965885
      outer loop
         vertex 1.91402 -0.852177 -0.310374
         vertex 1.94637 -0.866578 -0.319865
         vertex 1.98905 -0.763525 -0.319865
      endloop
   endfacet

The above is Ascii and we have acknowledged that we have an issue at the moment, I woudl suggest the you make use of our Meshmixer:

http://www.meshmixer.com/

Good luck.

[AustinLiu]

Hi Travis, Thanks for providing the sample files; our team are actively looking into this case, and sorry for the inconvenience to you.\ We also need your help on 2 things here...Thanks in advance. 1. May you please send me more STL files that you have the problem with? We hope our future fix can solve more than just one STL file for you. 2. And on the other hand, may we know your Inventor version? we want to know on which Inventor release you are looking for the fix, as well as the priority/severity from your perspective. Feel free to contact me via email if you want to share some models. (my email: Zongjie.Liu@autodesk.com) We greatly appreciate your help on this case. Thanks, -Zongjie SQA Engineer @ Autodesk

[KevinLi-Autodesk]

Hi Guys,

This issue is fixed in Inventor 2015 SP1 which had been released, please download and install it via below link to have a try.

Inventor 2015 SP1: http://knowledge.autodesk.com/support/inventor-products/downloads/caas/downloads/content/autodesk-in...

Inventor 2015 LT SP1: http://knowledge.autodesk.com/support/inventor-lt/downloads/caas/downloads/content/autodesk-inventor...

Any new issue please let me (Hongyuan.Li@autodesk.com) know.

Thanks,