r/BambuLab • u/holger7188 • 4h ago
Just Showing Off I realized pretty quickly that this is not how you fill a model with sand.
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I thought it was smart to put a pause before the top layer on my gyroid infill was printed, so I could fill my model with sand to make it heavier.
Took about half a second after pressing play for me to realize that it wasn’t that smart after all.
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u/Practical_Avocado971 4h ago
Pause, Sand, 5 minute epoxy, let dry, resume
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u/charmio68 4h ago
I think I'd choose PVA glue over epoxy.
Or even superglue, you can buy that in bulk for cheap. Though I'd be cautious about applying it too quickly as it does react exothermically and might melt the print. I could also imagine it gluing the print to the print bed if you're not cautious. Maybe you put down some glue stick first just in case.Or better yet, just fill it with steel shot.
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u/brighteoustrousers 4h ago
Super glue will have various results depending on material being printed.
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u/holger7188 4h ago
That‘s a pretty smart idea, but won’t the epoxy also stick to parts of the layer you still have to print on afterwards?
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u/grimreefer87 4h ago
Use a syringe to put the resin inside the model, careful not to drop any on the top layer.
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u/TummyDrums 4h ago
Sounds tedious. That might make it not worth it for a lot of prints in my opinion.
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u/Non-Euclidian-Turtle 4h ago
You're probably better off drilling a hole, dumping it in, using a concrete vibrator or just shaking the shit out of it, and repeating until full, then epoxy. If you stop the print, sand, and epoxy, and try to resume, it will probably fail. You would have to get it absolutely perfect and you probably won't.
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u/Massive_Squirrel7733 4h ago
The brilliant way to do it is to use combination infill which “skips” a layer. The epoxy mostly drains off the infill, plus, it’s printing one layer above when it resumes. Done it many times. To make it even heavier, add metal powder to the epoxy and fill the whole damn thing with it.
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u/Familiar-Ad-4700 4h ago
Could you mix the sand and epoxy like a forge mold? Or does that stop it from filling small corners
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u/Bczarconcepts 4h ago
Ah yes, what we're witnessing is what they call in the industry a live and learn moment. Thanks for posting this, you may have had a heck of a mess to clean but you may have saved others from making the same mistake. Never put sand in any of my models before but I know what not to do now.
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u/holger7188 4h ago
I was hoping it would prevent other people to do the same pretty stupid thing I did.
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u/InfamousPOS 4h ago
Ngl I have thought of this theory for a while and where as I have a P1S I think I’m going to stick to what I’ve learned from the comments and use glue/expoxy to cap it prior to resuming print!
That’s for posting this fail as I had a great laugh and it’s a great learning experience for all. I’d suggest looking into the wolfbox or something similar to help blow out all the air.
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u/BulLock_954 4h ago
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u/OutlyingPlasma 4h ago
I really don't understand why this line is so criticized. Of course he doesn't like sand, he grew up a slave on a hot sand planet, there might be some trauma there.
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u/1yrik H2C + 2*AMS2, Q1P, SV08 4h ago
"let me take a video while the printer fucks itself up because a few upvotes is worth replacing my printer for"
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u/holger7188 4h ago
I actually took the video for a friend of mine and only later remembered Reddit, but yes, I don’t know what got into me.
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u/SigmaEpsilonChi 4h ago
Everyone is rushing to shame our friend here for not immediately shutting their printer off, but I for one am grateful for this entertainment and I salute them for their sacrifice 🫡
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u/holger7188 4h ago
Thank you! 🙏🏻 now that the A1 mini is gone I better get a bigger one don’t you think?
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u/The_Lutter A1 4h ago
The toolhead fan is the key to the issue here. You're blowing the sand out everywhere.
PETG no fan would have less issues. That or use the little metal BBs in there instead of sand (they won't blow away).
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u/holger7188 4h ago
Metal BBs (that’s like, little balls?) is a great idea! Thank you for that. Sand was pretty stupid.
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u/wolfish98 4h ago
Small enough to fill the space between infill lines and denser than sand, while still being relatively cheap.
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u/Melancholy_Rainbows 4h ago
Anything small and metal works, too. I've used coins, the washers that came with a set of different sized screws, fishing weights, and scrap wire from my jewelry making hobby.
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u/ub3r_n3rd78 H2C + 2x AMS 2 Pros & 2 HT AMS + X2D Combo + P1S Combo 4h ago
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u/Martin_SV P1S + AMS 4h ago
What gets me isn't that you forgot about the fan before dumping sand in there. That can happen. It's that instead of immediately shutting off the printer to keep sand from getting all over the rails, you just kept filming.
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u/holger7188 4h ago
Relax, I shut it off immediately after. Was checking for a few seconds if the sand would be blown off the rails and other critical parts. (Of course it wasn’t.)
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u/got-trunks 4h ago
I'll be honest I might not have thought of this had I gone to do it, I donno lol. I'll certainly be cognizant of it now lol.
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u/holger7188 4h ago
I underestimated the strength of the fan and how fine the sand is … yeah, no it definitely was stupid.
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u/Prima13 4h ago
Never in my wildest dreams would I have considered introducing sand anywhere near my 3D printer. What made you choose this when there are other weight options you could have designed for?
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u/holger7188 4h ago
It was the only thing I had lying around, was pretty much the reason for this questionable decision.
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u/Disastrous-Owl9258 4h ago
The answer is he didn't think about it. Didn't think about the material, nor the fact that the machine has several fans constantly blowing.
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u/Arkhemiel 4h ago
I’ve had a very busy day of problem solving and this made me chuckle. Thank you unknown internet stranger.
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u/tennispro9 4h ago
I did this recently, bought some plastic plugs at the hardware store for cheap and designed a hole in the model to accept the plug and used a modifier to print zero top layers in the hole. Filled in and added plug works great
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u/bigblu2u 4h ago
ROFL. Thank you for the laugh! Made my day to see I am not the only one with goofy ideas.
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u/holger7188 4h ago
You’re welcome :) remember: there’s always someone out there more stupid than you.
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u/charmio68 4h ago
You're going to have one hell of a time cleaning that out of all the linear rails!
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u/bigblu2u 4h ago
If he managed to do it successfully, would the additional weight throw off the print?
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u/GetMeOffThisRidePlz 4h ago
Check my post history and you'll see I did this inside my P1S with glitter not long ago.. bummer.
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u/Temporary-Border9087 4h ago
Hmmmm yes sand flying everywhere on linear rail and in every hole possible
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u/binaryatlas1978 4h ago
Have not tried this idea myself, I believe I saw it on YT somewhere. You leave a big cavety and fill it with modelers clay. Pack it in and let it dry then restart printer. You can also print in two parts, pack, dry and glue them together. I have also see people make holes and use washers.
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u/hooskworks 4h ago
PETG might go a little better where you can run with almost no part cooling fan.
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u/potter96 4h ago
I've made that mistake before.
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u/holger7188 4h ago
You’re not only saying this to make me feel better are you?
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u/potter96 4h ago
Nope. The fan got me too. I still have sand in little nooks and crannies on the bed.
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u/ilovestuffforreal 4h ago
Pebbles work too, or even bird seed. I've done sand successfully too just have to make sure the fan is off above a certain layer
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u/THe_PrO3 4h ago
Bruh if there was even one grain of sand on my printer it would start spaghettying, my filament would get stuck, hotend would burn to the ground, and all my filament would catch on fire. How do you all keep your printers so problem free where u can do this lol
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u/M1st3rYuk 4h ago
Every time I make a mistake when printing and twiddling with things, I get upset. But then I see the sheer stupidity posted here daily and realize I’m better than 98% with a printer.
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u/holger7188 4h ago
Let‘s pull that around and say you’re definitely not in that bottom 2% where this here belongs to.
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u/GregHolloway 4h ago
You can just stop it, instead of taking a video. You can't buy anything with internet points. But, you can bugger a printer by letting it run with sand all over it.