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 
Moderation policy: Light, mostly invisible
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Purge lines can be implemented in a slicer (see: skirts), your printer's firmware, or macro if your running klipper. Slicer based purge lines are optional in Slic3r and its derivatives (PrusaSlicer, etc) as well as Cura.
Why are they there? When your hot end sits hot, filament in the melt zone will slowly ooze out. This happens to me while my printer waits for the bed to heat up. If your printer does this and you were to print without a purge line or skirt your printer wouldn't actually extrude any plastic until it the nozzle is filled again.
There's also the matter of the filament in your nozzle getting kind of scorched if it sits in there for a while.
With klipper I have the purge as part of the print start macro. So much easier since I’m using KAMP and this way the purge is right there by the print for easy removal.