3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: !functionalprint@kbin.social or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
Rules
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No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
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Be respectful, especially when disagreeing. Everyone should feel welcome here.
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No porn (NSFW prints are acceptable but must be marked NSFW)
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No Ads / Spamming / Guerrilla Marketing
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Do not create links to reddit
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If you see an issue please flag it
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No guns
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No injury gore posts
If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
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Depending on which slicer you use, you can probably merge them as an assembly. I use Orca Slicer and after loading a model I can then right click on it and add an STL to it. Then it's a matter of positioning and lining them up. Once done you can slice it as one model.
I'm using a resin printer so Orca won't work for me.
I believe you can export as an STL from Orca Slicer, though I haven't done it myself. You'd basically merge the STLs in Orca, export, and then open the exported STL in the slicer of your choice.
I'll give it a try.