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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I will not reiterate the great things others have said but I've used old windows to create an enclosure for my printer and it definitely helps with the prints. Also since you're a new user and have an Ender 3, I would recommend you to take a look at thingiverse.com and printables.com - if not already done - for great tweaks to protect your printer but also to find great things to print.
For your printer, you may be interested in cable guides, filament guide, spool roller, fan duct, bed lock (they will keep your bed in place so you will not have to deal with bed tramming anymore before your bed leveling sessions)...
Finally, although a little bit off topic, if you get bored to walk to your printer to watch the prints and would like to add some level of safety in case anything goes wrong I would highly recommend considering octoprint.
Thanks for the answer! The first thing I printed is indeed a tool holder I downloaded from thingverse. I don't understand very well the purpose of the bed lock: it basically avoid the "calibration screws" to accidentally "unscrew" while the printer is working?
Octoprint seems very very VERY interesting, but sadly in my garage there is no internet connection :(
You are correct. The screws will move a little bit when you print which will result in your bed being unleveled after few prints and you'll have to recalibrate your printer. This hack will eliminate that so you will have to level your bed less frequently (because as others said, leveling your bed will be needed for other reasons).
I'm not OP but thank you, I will be saving this comment for future use!
Glad it can be useful.