CAD systems and interchange files.

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CAD systems and interchange files.

Postby KD6HQ » 2014-Dec-Wed-13-Dec

I am starting this thread because I am very interested in exchanging and modifying different printer designs.

I am currently using "FreeCAD ver. 0.14 software. I do not have a lot of CAD experience so I'm hoping more knowledgeable folks will join in.

I find that it is possible to import a *.stl file into FreeCAD but it is very difficult to modify existing geometry. I believe this is because all the data points have been removed from the file so they cannot be referenced.

Anyway I invite every to join in.
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CAD systems and interchange files.

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Re: CAD systems and interchange files.

Postby RetireeJay » 2014-Dec-Wed-14-Dec

viewtopic.php?f=26&t=4790

There are so many CAD systems that it gets very difficult to try to find one common denominator.
Even the underlying thought process and mathematical models differ dramatically, so there is no such thing as an underlying "unity" that all the programs use. The best we can do is find an intermediate "language" that is easier to share. STL's of course represent the objects pretty well, but they are not by themselves easy to edit. Some CAD programs can import STL into their native representation internally.

The other thread I referenced above names a couple more semi-universal formats.
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Re: CAD systems and interchange files.

Postby orangefurball » 2014-Dec-Wed-15-Dec

I currently use Sketchup Make, in the case of those 1405 parts, the centers of the holes can be marked and saved in an SKP file, then opened by anyone else with the free software.
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Re: CAD systems and interchange files.

Postby KD6HQ » 2014-Dec-Thu-21-Dec

I have Sketchup Make but don't usually use it. I would think that if you transferred the normal *.skp file all data points should be included and nothing special should need to be marked.

Looking at the link provided by RetireeJay, it looks like some programs have several options.
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CAD systems and interchange files.

Postby Bellus » 2014-Dec-Tue-00-Dec

I have solid works student edition and I just downloaded fusion360. I have not used either too much yet, but solid works has way more than I can even fathom and 360 seems like a toned down variant. On the plus side they both have a bunch of tutorials.

Once I figure them out a bit more I would be more than willing to jump back in the conversation. I have tried to modify .stl in SW before but like you said geometry was either missing or I had no clue what I was doing, more than likely the latter one.
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Re: CAD systems and interchange files.

Postby thawkins » 2014-Dec-Tue-00-Dec

Bellus wrote:I have solid works student edition and I just downloaded fusion360. I have not used either too much yet, but solid works has way more than I can even fathom and 360 seems like a toned down variant. On the plus side they both have a bunch of tutorials.

Once I figure them out a bit more I would be more than willing to jump back in the conversation. I have tried to modify .stl in SW before but like you said geometry was either missing or I had no clue what I was doing, more than likely the latter one.


Im planning to learn the basics of fusion360 over the xmas break. Given its ability to operate as a shared repository, it may be possible to create a community shared area, that would allow us to interchange editable assemblies and subassemblies.
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Re: CAD systems and interchange files.

Postby KD6HQ » 2014-Dec-Tue-07-Dec

From the little amount of reading I have done, I believe that is exact ally what you can do.
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