• 3D Printing Thread V2 - Making homemade spaghetti since 1981
    289 replies, posted
Less of a rocket, more of a bomb, as it turned out.
Couldn't find a nice case to download, so I made this: LM2596 buck converter case (with display) by Usuariu Was originally gonna print it in black ABS but it's summer here in the south hemisphere, and for some dumb reason the Ender 3 runs the part cooling fan in parallel with the controll board fan, and since you don't use part cooling for ABS, the board fan will not turn on and burn in a hot day. I turned off mine as soon as I saw a little smoke coming out. https://files.facepunch.com/forum/upload/264052/f8621076-0fff-4889-9173-d8d6a5c61686/key713.54.jpg Expectations vs reality: https://files.facepunch.com/forum/upload/264052/e3f9c56a-e968-4077-a3ee-6f942762580c/51cba0e9b2dfbf8897393dab541c6715_preview_featured.jpg
https://files.facepunch.com/forum/upload/703/adc81c07-b199-4d20-9cd9-7311e75374a6/image.png https://files.facepunch.com/forum/upload/703/c44a846b-a7cf-43e2-8321-dc99e2364928/image.png https://files.facepunch.com/forum/upload/703/6d23ae44-734a-4d0b-ba37-1b51be730119/image.png
Oh, right. I forgot, here's a video of the rocket.. uh... "flying" https://www.youtube.com/watch?v=Rv_zx414MpY
Hahaha oh no! What was it printed from? I know people like PETG for strength/temp resistance. I've used it a few times but it's so sticky and I'm not convinced it's really that much stronger.
It was regular PLA, but the problem was that the exit hole was too small, so the pressure buildup exceeded the release.
I got a rip of the walker tanks from Destiny that I've been converting into something print-ready and I'm nearing the end of the whole process, which puts me at a question - I'm currently preparing the legs and because of the way the geometry is already, I have the option to give them limited articulation (basically just rotating along one axis at the "knee"). It's gonna be a desktop model (basically something to look cool on a shelf) so I'm wondering if it'll be worth the trouble, especially if the rest of the leg lacks articulation. https://files.facepunch.com/forum/upload/236919/10ac4caf-b1fb-466a-a56e-293376ed4ba1/image.png https://files.facepunch.com/forum/upload/236919/27198e2d-0585-4aae-9c02-324333bb9780/image.png The joint in question - I was thinking the upper and lower leg would be separate parts which slot together with a peg inside the knee.
https://cdn.discordapp.com/attachments/367775379324141568/533818850110734336/image0.jpg Also printed a Hawk from Destiny. Would've liked for it to be bigger so that the detail and edges weren't so rough.
http://puu.sh/CGBCh.jpg Made a quick little CNC pen plotter for my friend to test out his stepper motors!
Watch it move! http://puu.sh/CH8Qb.webm Hopefully it'll work in real-life too
If a ballpoint pen or similar is being used I see nothing that could really go wrong. Though, making a dampener mechanism of some sorts for the pen would maybe help so that the pen won't accidentally tear through the paper and damage the parts, but that seems unlikely.
Yeah I thought about it, but I think that as long as you adjust the height precisely, dampening probably won't be needed. I've tried something similar with my 3D printer and a ballpoint pen, and I kinda wanted to keep the mechanical complexity as low as possible.
Pretty cool! Are those sliders rigid enough? How much play will they have? I'd be worried about the top one specifically. Since all the weight is over one side and it's mounted on the top of the rail the mass will try to rotate the slider. Although I'm probably overthinking it since it's plastic and only holding a pen :P
I have no idea! Anyways, now that I got the basic idea down, I sat down and redesigned it far more streamlined. Not quite done yet though: http://puu.sh/CI7bz.jpg http://puu.sh/CI7hX.jpg https://puu.sh/CI7jb.jpg http://puu.sh/CI7jW.jpg
Looks good! As guidance you could look at some of the cantilever 3D printers. https://files.facepunch.com/forum/upload/703/058f0ac0-e479-4c8e-a894-6c7fb7aa56cf/image.png The X axis stepper offsets the head weight. The Y axis rail is centered on the platform.
This thing exists solely as a testbed for figuring out how stepper motors work. My friend has 3 of the same stepper, so it's designed for those. It's not an attempt at making a serious piece of machinery, just a tiny little pen plotter. Also, I wanted as few non-printed parts as possible. When we're done playing and figuring things out with this thing, he'll move onto building a proper CNC wood carving machine. (as a sidenote, my actual 3D printer is of the design you showed in that picture. Cetus MK3 Extended)
Neat I'm curious to see how well the rails work. I think I bought a set of 6 of those steppers from amazon, they came with controller boards too. I kept getting strange behaviour when controlling them with my arduino nano though but it was most likely due to the stepper motor library I was using.
Cool stuff. When I'm done testing, I'll publish these files so you can play with them if you wish.
https://www.youtube.com/watch?v=SxkA8zfXPcM after some fiddling we got the CNC machine to properly move
Amazing! How well did it work?
not very
Part of learning how stepper motors work is to recognize that, while amazing, they're not for everything.
I'm considering being a basic bitch and buying a prebuilt Prusa I3 MK3 with my tax return. I've never used a 3D printer before, but despite hearing that Prusa's printers are the easiest to assemble I'd really like the pre-assembled full warranty so that I don't accidentally fuck up $800 of non-refundable parts. However, am I just giving into marketing memes? Is there a comparable printer for someone who just wants to print things without much fiddling around that's a better buy? Reddit seems to have been convinced in the past that it's the best printer for someone like me, but maybe there is a new printer manufacturer I'd be better off with? Basically I don't want to buy an IPhone when a cheaper Android is just as good or better. Offering useless FP diamonds and gratitude in return for advice.
I wouldn't imagine the Prusa I3 being an easy machine to start out with if you're looking for something simple. Not sure what to suggest though. A FlashForge Finder is a great first printer, it's ridiculously easy to use.
The Prusa is definitely worth the money 9/10 because of all the engineering put into them. Some of it is yes a bit overhyped, but the Prusa deserves most of the praise it gets. There's cheaper mostly assembled "kit printers" like the Ender 3 that have a great amount of engineering put into them as well. Depending upon how much effort you want to put in, a <$400 kit printer will definitely have you learn all the tips/tricks and nitty gritty details to get it printing properly. So really those extra hundred dollars pay towards less headaches and just "print-and-forget" sorta experiences. I (and @Zero-Point ) both bought Tevo Tarantulas which are one of the cheaper Chinese printer kits but are definitely the better of cheap Chinese Clones. They are initally a hassle but after assembling and reassembling, a couple hours of tweaking and firmware updates (and a new nozzle). I learned its flaws and quirks and now have a solid PLA/ABS machine. TL;DR The Prusa is definitely worth the money mostly but the Ender 3 is a great runner up in the "print-and-forget-minimal-headaches" catagory. But whatever printer you choose, be sure to get one with automatic bed leveling. It really saves alot of headaches (even on pre-assembled printers).
Ha HA, no. There's a definite QC lottery with these machines, and for the price, you'd still be better off with an Ender 3.
Thanks to all. I'm not interested in the smaller FlashForge Finder and its absolute simplicity, but the Ender 3 is certainly considerable at 1/4 the cost. Ultimately, I've decided to go with the Prusa I3 MK3; your advice has convinced me that it's a reasonable option for someone who's willing to pay more to avoid some common debugging. Diamonds for everyone
Speaking of the overly simple FlashForge Finder, I yet again decided to actually put the fella to use again, after a good cleaning of the nozzle'n such. Decided to finally print something at its maximum capacity, which it seems to have managed decently well. https://files.facepunch.com/forum/upload/164/afe2b6b9-77ec-465c-8571-11993779506f/2019-02-06 08.03.53.jpg Always seems a bit random if there's stringing or not, nothing too considerable on this one though. https://files.facepunch.com/forum/upload/164/6ea6d0ba-600f-4445-8e17-cb69fad887de/2019-02-06 08.05.38.jpg Cola bottle for scale
You'll still have to tweak and adjust the printer in order to get good prints, which is harder than the build process for most printers. The Prusa is a solid printer i'm sure you'll be pleased I really need to get back into designing something. I haven't printed anything in a good few weeks
How'd you get those supports? They look super minimalist, I wish the slicer I have to use would do that.
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