|VariCAD Support | 9.7.2008 14:51|
Please can you send us both DWB (VariCAD format) and STEP (your output from VariCAD) files at firstname.lastname@example.org ?
Also, it would be helpful if you could attach a sreenshot of what are the unwanted artefacts in Rhino.
We will look into the cause and inform you.
Problem with STEP (3D) export - unwanted artefacts
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|Problem with STEP (3D) export - unwanted artefacts|
|N Withnall | 9.7.2008|
I'm trying to export a 3D model in STEP format but am finding that the model includes some unwanted artefacts when I import it into a different application. Specifically, I'm trying to model the bottom section of a plastic case that I've created using the shell tool, to which I'm using filleted cubes to boolean holes in the case. When I import the file into a different 3D package (such as Rhino) some of the fillet profiles appear as extruded surfaces, which are much longer than the original boolean objects.
I've tried using the explode tool to work out what's wrong but there doesn't appear to be any obvious problem with the model, and I've also tried to boolean holes with basic cubes first and then fillet the corners of the holes, with the same results. The odd thing is that the extruded surfaces are present on one (sometimes two) of the fillets but not all of them, and it's not always the same ones.
I can post an image to explain the problem more clearly but wondered if anyone could offer any help or advice. I've looked at using the IGES export option but this breaks the surface apart into lots of constitute parts and would prefer to use STEP as it creates each part as a continous and seamless model. Other than this problem, I've found VariCAD to be an excellent program and the ability to import proper NURBs models directly into Rhino (as opposed to having to commit everything to polygons) is invaluable.
|Problem Now Solved|
|N Withnall | 11.7.2008 02:29|
I seem to have solved the problem now by experimenting with the STEP export settings (the artefacts didn't appear once I'd changed the settings from NURBs to analytical). We might be looking to have our prototypes produced on stereolithography machines so we'll also be able to use the STL format as well I think.
Since posting my question I've been asked to change the design I'm working on but if I can replicate the problem again I'll send over the relevant files to your support team.
On a different note, do you have any plans to port VariCAD to OS X in the near future, and are there any third-party plug-ins available (either rendering or import/export)?
|Problem Now Solved|
|VariCAD Support | 11.7.2008 12:20|
Thanks for the information - I am pleased to hear that it works fine now.
As to OS X, there are no plans to create a version for this platform in the near future. As to rendering, you can use any rendering software that can import STEP or IGES (or STL) files.