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SimScale Import of OnShape CAD
mas985
Member Posts: 6 ✭✭
I am running into an issue that I hope someone can shed some light on. SimScale lets me import OnShape drawings directly into SimScale. However, when I do this, a smooth pipe drawing becomes faceted. Is this a limitation with the STEP import? If I export to STEP and then import the file, the same result occurs. IGES is also the same. However, if I export a fine STL file, the object looks fine in SimScale but then there are no faces to assign inputs and outputs.
Also, if I import the STEP file into a CAD viewing software such as GrabCad, I still see the faceted surface so it looks like OnShape is exporting the drawing with these flat surfaces even though the drawing in OnShape looks completely smooth.
I am just trying to figure out if this is an OnShape issue or SimScale.
OnShape Drawing:
Imported into GrabCAD
SimScale Drawing:
Also, if I import the STEP file into a CAD viewing software such as GrabCad, I still see the faceted surface so it looks like OnShape is exporting the drawing with these flat surfaces even though the drawing in OnShape looks completely smooth.
I am just trying to figure out if this is an OnShape issue or SimScale.
OnShape Drawing:
Imported into GrabCAD
SimScale Drawing:
0
Best Answer
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NeilCooke Moderator, Onshape Employees Posts: 5,671Onshape development spend a lot of time optimising the rendering engine to improve how your models look. Can't speak for anyone else.Senior Director, Technical Services, EMEAI7
Answers
When imported back into OnShape, it looks fine (i.e. without facets).
But I think it does affect the simulation in SimScale because the mesh looks just like the imported geometry with flat facets. I have asked the same question over there as well.
What concerned me was that GrabCAD looked the same as SimScale so I assumed it was something to do with the export. I would expect some small rendering artifacts but if you look at the picture, they use 16 straight lines to represent a circle which is very crude.
This is Sam from SimScale Support! Can you please direct me to your document? If possible kindly share it with srajendran@simscale.biz.
I can check the issue and get back to you at the earliest possible. We need to investigate further as to the reason for the problem occurring with SimScale platform and other tools as well.
Thanks!
Thanks for your help.
Thank you for sharing the document and SimScale project. I see that the issue is caused due to minor regression on our end.
We have fixed the problem. Please import the CAD again from OnShape and it should work now as usual.
Best,
Sam