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Re: Imagine 3D for 3D printing
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I am currently testing and trying to learn a program called Open SCAD. This program produces solid 3D models that are 3D printable.

Modeling is done using text based commands, so if anybody became familiar with Arexx with Amiga, 3D modeling with Open SCAD might be fairly easy to learn.

Objects made in Open SCAD can be exported as STL files and after conversion can be opened in Imagine3D where they can be manipulated as usual and saved and imported back to Open SCAD.

So basically what I would only need to learn is how to import parts of objects made in Imagine 3D into Open SCAD to do the merging and saving there - the result (if successful) should be a solid object for 3D printing.

Posted on: 1/16 3:35
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Re: Imagine 3D for 3D printing
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Thanks a lot for the input. Yes, I understand the printing itself is art and science of its own. That is why I would like to understand the modeling part and leave printing to a specialist whenever possible.

However, it may be impossible to learn what could print and what could not without having a printer available for test runs.

Posted on: 12/15 6:13
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Re: Imagine 3D for 3D printing
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And here is the Venus head downloaded from here on the printer software printing bed:

https://i.postimg.cc/9Q9TtjyP/venus-Slicer01.jpg

It would certainly print, because it was watertight and had one shell (mesh) only.

However, coke can was not watertight and had overlapping vertices (according to AccuTrans3D).

So the objects downloaded from here vary in their ability to 3D print - needs more learning about what causes what.

Posted on: 12/8 2:52
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Re: Imagine 3D for 3D printing
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I have here in the printer software a fairly complex object (antique lamp) that I downloaded for testing purposes:

https://postimg.cc/w7gLS8F1

I opened the object in AccuTrans3D and merged there. After merging it passed watertight check, but still had 17 meshes (printer software calls them shells).

Whether this object might print correctly or not I could not tell because I do not have a printer (outsourcing the print jobs). However, despite having more than one mesh it appears fine in the printer software.

So the whole printing process requires looking into this meshes (shells) business to find out if and when it is acceptable for the object to have more than one to print correctly.

It is my understanding at this point that CAD software outputs objects with just one mesh.

Posted on: 12/8 2:24
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Re: Imagine 3D for 3D printing
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I was able to use three primitives to make a simple object in Organica.

When opened in AccuTrans3D the Organica object first had 269 meshes. After merging the meshes in AccuTrans the object was both watertight and one mesh only, thus 3D printable.

Posted on: 12/8 1:41
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Re: Imagine 3D for 3D printing
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It appears that the relevant Imagine3D command would be 'Skin' - as in wrapping the merged objects inside one watertight skin.

But when I try that I get message 'All objects must be identically structured and faceless'.

So how does one make objects faceless?

I think this might start to describe the problem to somebody with experience on the inner workings of a 3D program.

Edit: is it a question of inside and outside faces? So the merging should merge all outside faces into one seamless surface area.

Posted on: 12/7 21:18
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Re: Imagine 3D for 3D printing
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And the situation is no different if I imported objects into FreeCAD and merged there - still 2 meshes and not watertight.

So it looks like some sort of "artificial intelligence" is needed to combine meshes (merged Imagine object) into one watertight mesh.

Posted on: 12/7 19:54
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Re: Imagine 3D for 3D printing
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In AccuTrans 3D it is possible to open multiple objects as layers and then merge those layers. Relevant for a 3D printable object are mesh count and watertight.

When I merge overlapping objects or layers in AccuTrans and then check for watertight, it continues to say mesh count is 2 and objects have holes in them.

So this modeling method does not support 3D printable objects as such - but there may still exist a way to do it.

Posted on: 12/7 19:32
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Re: Imagine 3D for 3D printing
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That is correct understanding but unfortunately the outcome does not work. If you wanted to try it, you could download demo version of AccuTrans.

In AccuTrans the object needs to have 1 shell only to print correctly. Merged or joined Imagine objects have two or more shells - as a result they show incorrectly in printer software.

However, I am currently evaluating FreeCAD which some have said is awkward to use. I am not that far yet to say anything about that but at least it seems to be able to merge objects that have one shell only in AccuTrans. Thus objects exported from FreeCAD should print correctly.

I will test some more with Imagine objects to see if they merge in FreeCAD to produce printable items.

Posted on: 12/7 1:14
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Re: Imagine 3D for 3D printing
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Hello, it sounds good. I sent you a message.

I have several small projects going and I could discuss those in messages (not trying to kidnap this thread).

If it is okay to put a link to website, it would be rokkorlab dot net.

Posted on: 2018/10/12 0:39
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