MoI discussion forum
MoI discussion forum

Full Version: STL files can't be 3d printed

From: nikola (ZENOX3D)
6 Jan 2018   [#1]
First I wish you Michael and to other moi3d users Happy,productive and creative New Year 2018.

Now my question.I uploaded some 3d models designed and created with Moi3d V3 version on my mini factory website.People like my 3d models,but there is sometimes problem with inverted normals when I export it to STL with moi3d.Thank you in advance for your advice and for your help.Should I use other software to fix that problem or something else to do.

Here is one of message from my mini factory member
<Hi. Message to the creator of the design. Can you separate wheels from the main body and check for the STLs to be manifold? As it is now is not printable. In meshmixer it looks like the STL file is kind of inverted>




Image Attachments:
screenshot-2018-01-06-20-15-02.jpg 


From: Michael Gibson
6 Jan 2018   [#2] In reply to [#1]
Hi nikola, the first thing I'd check is if the object is a solid in MoI or not, you can do that by selecting the object and looking at the object type indicator in the upper right area of the window, does it say "solid" or "joined surface" ?



In order to be 3D printable, the receiving software for the printer will expect that the object is a closed solid.

If it's not a solid in MoI that means there are openings in the object that are stopping it from being "watertight". You can find where the openings are by using the highlight naked edges script from here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=6051.2

It also looks like you may be sending multiple different objects in one batch, you might focus on just one individual object per stl file, and also it looks like you have some small scale details in the model which could be smaller than the build tolerance, those features might need to be removed or simplified in order to get a good print.

You might also use an STL checker program like MiniMagics to load your STL file and show problem areas.

STL processing is in general far more finicky and sensitive than rendering and your model needs to be cleaner and simpler in order to be printed than it needs to be for rendering.

- Michael

Image Attachments:
nikola_objtype.jpg 


From: nikola (ZENOX3D)
8 Jan 2018   [#3] In reply to [#2]
Thank you Michael for you very detailed explanation.By the way it shows me joined surfaces.Now I see where is the problem.Ok I will check where are gaps in my 3d models.I don't have 3d printer and I don't know a lot how to prepare my 3d models,now I see how it works.

By the way here are links for my printable 3d models created with moi3d V3 version, where others can download my 3d models and 3d print if they like it.Members can tip me,but for now nobody gave me a TIP.Anyway it's fun for me to see how my 3d models created with moi3d look as real objects.I hope so you will like it.

https://www.myminifactory.com/object/50256

https://www.myminifactory.com/object/50269

https://www.myminifactory.com/object/50229

https://www.myminifactory.com/object/50233

https://www.myminifactory.com/object/50530


Best Regards, Nikola aka Zenox3d