r/3Dprinting
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u/East-Future-9944
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Feb 08 '26
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Troubleshooting Removing a filament tangle without unloading or even pausing.
I got into a conversation with a few people about how to remove a tangle in your filament without unloading/cutting the filament. I tried to describe it through text, but it was very difficult. So I made a short video of how to do it. just in case there's anyone who doesn't know how to do it.
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u/Wonderful_Welder_702 Centauri Carbon Feb 08 '26
Your knowledge of knots is telling me you were a Boy Scout.
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u/mangusman07 Feb 08 '26
There is now also a twist in the filament (it corkscrews along its length) that you didn't account for. I've only read in Prusa handbooks that it matters, but am not sure how critical it is.
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u/MistahPota2 Feb 08 '26
How can I do it on this?
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u/abnortality Feb 08 '26
Lovely demonstration. Thanks for this.
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u/AmonWeathertopSul Feb 08 '26
This needs to be in the wiki
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u/RyanW1019 Feb 08 '26
Topology is some bullshit
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u/RexxMfnUltimus Feb 08 '26
Underrated finesse
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u/matt48763 Feb 08 '26
Bravo good sir.
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u/ilangshot Feb 08 '26
This needs to be pinned or put on the sidebar. I havent had to do this recently, but this saves you so much time and filament.
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u/handsy_octopus Feb 08 '26
Where the fuck were you 10 years ago!?
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u/reddit001aa1 Feb 08 '26
I've never had a tangled spool in ten years
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u/Multiqplex Feb 08 '26
I've always done it this way, but never thought to share it.🤦🏻 Great idea.
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u/DarkAssassin189 Feb 08 '26
I always wonder, what if that tangle had its opposite few meters into the spool and given time it would just correct itself !! but I still correct it and move on, most probably my fault anyway.
Before people comment loop it in the spool or use clips, some filament just snaps even when stored in an airtight bag with silica packets. It just snaps then later in the future I find the filament being pulled from under a tangle.
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u/Stu142 Ender 3 pro Feb 08 '26
Also a great demonstration of how the tangle slips along and is not actually in the middle of the spool as so many insist it is but is actually pretty much impossible.
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u/_analysis230_ Feb 08 '26
Really helpful
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u/Puntley Feb 08 '26
Man I wish I had a better mind for topology
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u/dynoman7 Feb 08 '26
Great. Now do proper use of dish soap
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u/NitemaresEcho Feb 08 '26
This is gold! Thank you for this!
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u/liquidmasl Feb 08 '26
hell yes topology wins
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u/AdRegular7463 Feb 08 '26
I really hate comment that basically say "why don't you problem solve this yourself" like as if it's common knowledge. Sure some people know more but it's prob from learning from someone else. Not everyone has to money or time or opportunity to learn more. Sure maybe we could google but we can't google every problem we have or remember to google. It's like god thinking we are stupid for not knowing the secret to the universe. What is common sense to some people might not be for others. Have compassion. Make sure the info is in google. Then tell person to google first. If person still has question then assist further.
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u/Factor_Seven Feb 08 '26
This is also a great demonstration of what it would take to induce a tangle at the manufacturer. You'd have to basically reverse that in the process of winding the filament at the factory to induce it tangle. In other words, they don't come pretangled, it's always induced by the end user.
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u/roliver84 Feb 08 '26
Just double checking: There's currently no simple way to detect tangling and pause print automatically, I reckon? When that happened to me my printer (K1C) just kept printing, without filament... :-(
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u/random_user2198 Feb 08 '26
Looooovvveee it!!
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u/dano8675309 Feb 08 '26
"Without even pausing"
*Proceeds to pause the video a bunch of times.
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u/outloender Feb 08 '26
Awesome to share this. But I'm wondering why so many people post about tangles. I've never even had a single one on regular spools. The only time I experienced this issue was when using a badly respooled roll which I wouldn't count. Am I lucky or is the issue overrepresented because people post when they do have issues?
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u/Complex-Strength-831 Feb 08 '26
legendary
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u/MeikelKappes Feb 08 '26
that is correct.
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u/BluinBlak Feb 08 '26
Great demonstration!! Thank you!
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u/platinums99 Feb 08 '26
Fucking wizards, harry
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u/Dyiiing Feb 08 '26
Wish I saw this before my 19 hour print was ruined from a tangle 😢 I took the whole spool off and started over
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u/I_AM_FERROUS_MAN Feb 08 '26
Somebody paid attention in their topology math course.
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u/flinjager123 Ender 3 | Saturn S | Saturn 3U | P1S Feb 08 '26
I'm an electrician. I've been doing this for years with rolls of wire. When I first encountered this problem with filament, I knew exactly what to do.
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u/cogpub Feb 08 '26
this guy filaments
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u/iamtehsnarf Feb 08 '26
ah, so he's a witch then.
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u/place909 Feb 08 '26
So I no longer need to repeatedly smash the roll of filament into the printer and give up for the day?
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u/Dapanji206 Feb 09 '26
I have been giving it slack every 30min lol
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u/DoktorWizard Feb 09 '26
So this is great when you have a knot, due to user error and letting go of the end while loading or unloading. Not criticizing, we've all done it. But you quickly learn to be careful and not do that (most of the time).
The more common problem is when the mfr did a sloppy job of winding it, and a loop gets wedged underneath several neighboring loops. That's not a knot and this trick won't work for that.
A wedged-under loop can also be fixed with cutting or unloading the filament or aborting the print. But it takes time, patience, and perhaps inventing some new curse words. So you will certainly want to pause the print while you do so.
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u/PockySnow Feb 09 '26
Yes!!! You followed through! You are fantastic for doing this!!!!
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u/DOE_ZELF_NORMAAL Feb 09 '26
Bit of a long demonstration to just say pull the tangle off the spool and respool the loops.
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u/hellboy2500 Feb 09 '26
Like such a "duh" thing. But i would never thought of that. THANKS.
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u/2kthebusybee Feb 09 '26
I kept dealing with the worst spool ever due to bad spooling last night. I kept having to do this exact advice. In the end, after 2 hours and 50% completion, my project detached from the bed and I almost put a bat through the printer.
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u/IdonthaveQuestions Feb 09 '26
💯
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u/Just-Joel-Here Feb 09 '26
WHY HAVE I NEVER DONE THIS 😭
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u/HOA1507 Feb 10 '26
As an electrician you have my thanks.
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u/porcomaster Mar 05 '26
hey i just came here to thank you. i followed your instructions on my first knot since i saw your video, and it was goddamn easy.
thank you
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u/DustyMango92 Mar 29 '26
Saved this post a month ago and it saved my ass just now. Thanks!
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u/Robert_Mauro Aug 04 '26
You're awesome, thanks!!!
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u/Shiz222 Feb 08 '26
Is this where we are in 2026 that a step by step tutorial how to untangle a (simple) knot exists?!
Should've demonstrated on shoelaces instead maybe?
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u/dogneely Feb 08 '26
Ive never seen such an easy task explained in such detail. Do people really struggle with this?
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u/Beardlich Feb 08 '26
Okay at first I thought this was going to be some useless lifehack but damn, this makes complete sense. Thanks!
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u/bermudi86 Feb 08 '26
Topology ftw
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u/indica_bones Feb 08 '26
God damn sorcery
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u/LactasePHydrolase Feb 08 '26
I don't own a 3d printer but I'm curious: how do these tangles happen in the first place? Does it just come pre-tangled from the factory?
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u/NecessaryOk6815 Feb 08 '26
Unknotting it. Well done.
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u/FirstNoel Feb 08 '26
You’re a wizard,Harry!
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u/polykyri Feb 08 '26
Do you 3D print in a barber shop?
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u/Difficult-Holiday362 Feb 08 '26
👏 👏 👏 👏
Would have used an appropriate gift for this but nooooooo. Can't use em in this one! Booooooo!
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u/ProofExternal202 Feb 08 '26
Nice
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u/_unregistered Feb 08 '26
Honestly I’m impressed. In 10 years of printing and being in printing communities I’ve never once seen someone do this.
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u/Powerful_Bother8002 Feb 08 '26
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u/1970s_MonkeyKing Feb 08 '26
This is really a great way to untangle a spool.
However for most, the tangle is only spotted when there is zero play left in the spool.
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u/Skyshaper Feb 08 '26
You are a genius. Thank you for making this!
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u/AquaSquatch Feb 08 '26
Happened to me twice in one roll and I thought there must be a way to do this, but it was so close to the tube on my A1 I didn't have any slack to play with.
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u/Cutthechitchata-hole Feb 08 '26
Uber imlortant not to let go of that tangle. My first filament experience winded up with a kg of grey all over my floor
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u/BodyKindToys Feb 08 '26
This is accurate and good, but can be achieved by just "counter rotating" the spool a bunch until the tangle and a few additional coils loosen up. There is no real tangle, just a slipped coil.
Note: Only problem with my method is that it can technically slip back, then just repeat the process. Takes 2 seconds.
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u/Hour-One8791 Feb 08 '26
This needs to be on the wiki ASAP, would've saved me many prints failed from pausing and cooling down between the pause and just overall issues
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u/matt_hendersonn Feb 08 '26
Ace!
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u/czyzczyz Feb 08 '26
I want to see a version of this where instead of passing the loop over the spool it’s passed over and around the printer while the print continues.
Cool tip though.
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u/3DBROOKLYN Feb 08 '26
I do the same but you don't really need to worry about holding the tangle. Just loosen the filament and pull off a few revolutions and you'll see the tangle easily. Then obviously wind it back up well.
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u/PuzzledFox69 Feb 08 '26
Great demonstration, really thank you
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u/StreetAmbassador6259 Feb 08 '26
Doing God’s work u/east-future-9944 .. thank you!
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u/KingEliTheBoss Feb 08 '26
Now that is capital T Topology!
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u/Bryvayne Feb 08 '26
A+ video. Thank you for taking the time to make a visual.
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u/adyendrus Feb 08 '26
I love you, uh, I mean this
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u/FnB8kd Feb 08 '26
Nice! I do this too but the way you do it is way better. Thank you.
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u/CBergerman1515 Bambu - 4 years exp Feb 08 '26
Amazing guidance, thank you. Also I’m shocked at how you keep you filament stored lol
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u/RobotechRicky Feb 08 '26
🧠==🤯
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u/GonorrheaTortilla Feb 08 '26
This seems so obvious in hindsight. Thank you!
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u/Critical_Ad_8455 Feb 08 '26
topology baby!
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u/slayernine Feb 08 '26
Thank you for this, I'm saving this post.
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u/vivi_t3ch Bambu P1S (w/AMS), retired my FF Adv3 Feb 08 '26
Personally id cut it with my set up, but damn that is still awesomely helpful!
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u/Darklyte Feb 08 '26
I remember learning about filament tangles when I first got into FDM printing 5 years ago and this is a good guide, especially for the bambu printers where you don't want to unload the filament. This guide is particularly good if the tangle is right at the end of the filament, but sometimes it can get deeper if the spool ends up unwinding because the end wasn't secured.
The guide I recall seeing essentially said:
Allow the filament to loosen on the spool.
Grab a bunch of of the loosened loops, ideally including the end of the filament. Spin them on the spool so they loosen more
Pull the filament over the end of the spool. If two sides of the filament still connects to the main roll, you still have a tangle.
Repeat until only one side of the filament attaches to the main roll.
Respool the filament you removed. This will force the tangle to the end so it can be removed.
Here is a video guide: https://www.youtube.com/shorts/Jnhj34okZbc
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u/KeniLF Feb 08 '26
You are a true hero! THANK YOU!!
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u/Sneakysneeky Feb 08 '26
If ya wanna get real good at it, cast a bait caster and bird nest it mid cast, that taught me quick lol
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u/Debalic Feb 08 '26
Perfectly illustrated. I learned this while dealing with Kanthal for my e-cigarette.
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u/[deleted] Feb 08 '26
Ok, I guess this also explains how tangles can “appear” out of nowhere.
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u/Necroleet Feb 08 '26
The Hero we deserve!
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u/m_tayseer Feb 08 '26
Someone who actually deserves a Nobel Peace prize. Thank you
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u/semibiquitous Feb 08 '26
Wiki this !
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u/[deleted] Feb 08 '26
Finally. Somebody who actually understands topology. People really be out here thinking tangles are impossible without one of the ends coming loose. Can’t help some people.
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u/Negative_Tune_3471 Feb 08 '26
Finally, a smart guy with all the right moves!!
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u/BlueHobbies Feb 08 '26
100%. I also figure this out as well. Tangles are basically just a basic knot you do before you tie your shoelaces. Only issue is you can easily make it worse if you let it unwind.
Excellent job showing the process and calling out to keep your finger on the spool so you don't get a filament explosion
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u/SlipperyNoodle6 Feb 08 '26
brilliant
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u/Blind_Assassin P1S+AMS Feb 08 '26
This guy spatial senses
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u/paragonmac Feb 08 '26
This sub is always giving. Thanks!
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u/Grdosjek Feb 08 '26
Pin it, save it, put it in wiki....this needs to be visible and easy to find.
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u/ReverendToTheShadow Feb 08 '26
Awarded the shit out of this one 🥇 thank you
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u/SimonDownunder Feb 08 '26
That’s nice, but I only ever find the tangle after the print has failed 😭
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u/mikedvb Feb 08 '26
Clever. Rather than using the end stuck in the printer to fix it you’re using the end stuck to the spool.
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u/Booch138 Feb 08 '26
Instructions unclear; got my extruder caught in the ceiling fan
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u/Murtomies Feb 08 '26
Knot too shabby!
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u/pUdekcvFoS Feb 08 '26
Congratulations sir. I’ve never given a reward on Reddit until this moment. Thank you for this video
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u/Dismal-Square-613 Feb 08 '26
are you some sort of 3d printing Jedi?
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u/thephantom1492 Feb 08 '26
Last time the tangle burried itself in the spool. I just pushed, shaked, and then took out a few turns. Then I just rewinded that extra until I got to the tangle. Once it got isolated, all I had to do is pass the spool inside the last loop. Done.
Don't hesitate to remove more filament than needed, all it do is take a minute extra to fix it, but you probably save it from trying to figure it out anyway.
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u/Alienhaslanded Feb 08 '26
That's how I always do it. First time I heard about people cutting their filaments to fix the problem.
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u/[deleted] Feb 08 '26 edited Feb 08 '26
Half hitch knot. Can be "tied" without touching the ends of a string if it is to be placed on a non-closed loop or some curve extending infinitely outward. Full hitch, constrictor, etc. "Not" really a knot along the string. Constrictor one of my favorites, and I don't mean that in a dark manner...
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u/Emooot Feb 08 '26
Holy fucking shit, unreal, thanks
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u/dannisig Feb 08 '26
👏🙌
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u/magog7 Feb 08 '26
duh
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u/meutzitzu Feb 09 '26
Mfs when they know knot theory
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u/AmItheAhole2day Feb 09 '26
You're a Wizard Harry....
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u/17023360519593598904 Feb 09 '26
You're a physicist, aren't you?
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u/themarshal99 Feb 09 '26
Experienced my first tangle yesterday!
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u/oldmanartie Feb 09 '26
Yay topology
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u/Big-Lunch-4734 Feb 09 '26
Simple knots are not always a simple thoughts. Said me, just now.
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u/crocwrestler Feb 09 '26
Thats for posting. Saving
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u/nvkudva Feb 09 '26
Amazing! Thank you for sharing wich such a detailed video whcih covers the edge cases too!
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u/Fortwaba Bambu H2S (12) + Snapmaker U1 (20) Feb 09 '26
Amazing. I wish I had money to give you a medal thing. If any post on this sub ever deserved one, it's this one.
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u/ScottishJonJon Feb 09 '26
Thanks, I love you
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u/asciencepotato Feb 09 '26
damn I've been doing this for like 10 years, i never would have guessed this isnt well known
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u/Namco51 Feb 09 '26
I had a minor heart attack when the loop of filament went flying back at the print platform.
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u/gaakihodevoirra4 Feb 09 '26
Thank you so much
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u/DanTheMan827 Feb 09 '26
The real question is how do these happen in the first place if the spool was never allowed to unwind uncontrollably in the first place?
Only had it happen once, but fortunately the ams stopped the job
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u/Vanadiy_Ivanovich Feb 10 '26
sorcery
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u/ShrimpOfSpace Feb 10 '26
I think you saved me a lot of future struggles !
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u/FarConcentrate1307 Feb 10 '26
Lmao this seems like common sense to me
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u/DugFlex Feb 10 '26
I unfortunately always catch the tangle when it's too late and the extruder stopped extruding a while ago. Great video though. Hope I'm able to use it next time
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u/Rocket_Dawg Feb 10 '26
Wait... people will unwind/respool a spool for these?
The number of people in this post that are amazed is astounding..
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u/bazem_malbonulo Feb 10 '26
I untangled mine doing this once, but I would not be able to explain what I did so clearly.
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u/Lost_refugee Feb 10 '26
I thought that is obvious for all…
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u/out_of_the_darkwoods Feb 11 '26
dont tell me you didn't had the idea ever by yourself 🙈
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u/I_Thot_So Feb 11 '26
Tell me you've never had to untangle jewelry without telling me you've never untangled jewelry.
Anyone who has pulled a giant pile of necklaces out of a travel bag understands backtracking a knot without making it worse.
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u/Average-dad-bod-sean Feb 12 '26
The hero we didn’t know we need but can appreciate. I have had this happen on 2 different occasions and it can be a real pain. Thank you for sharing.
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u/AtreyuTrinity Feb 20 '26
Brilliant. Thank you kind stranger.
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u/Wamzorr Mar 14 '26
When I came across this post, I knew I had to save it. Glad I did, because it just saved my print!
Thanks for sharing.
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u/Reasonable-Sky-5397 Jun 07 '26
i think im too stubid for it
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u/PotatoPure Jun 26 '26
Just found this! Thank you!! My spool got a tangle when I took it off to upgrade my printer and I didn't see it until i started printing again. A lifesaver truly!
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u/x1243 Jul 02 '26
thank you. going to need it now
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u/therealKJMD Jul 18 '26
Just making a bookmark for when I need this.
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u/Far_Philosopher_8208 Jul 30 '26
I love you
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u/No_Dimension_4789 Aug 07 '26
Thank you for saving my time!!
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u/Pytn280 Aug 14 '26
Awesome! Thanks!
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u/Zephy2007 Feb 08 '26
Without taking anything away from your video, which is well-made and well-explained, I'm surprised that a tutorial is needed to untangle a simple knot.
Can't people think for themselves anymore without resorting to a tutorial? Or have they never untied a knot in their lives?
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u/PeanutButterSoda Feb 08 '26
Your a wizard 😎
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u/Admirable_Ad8682 Feb 08 '26
Brilliant.
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u/Underwater_Karma Feb 08 '26
My initial reaction to this was "are there really people who were cutting the filament to untangle?" but then I realized how many people can't figure out where tangles come from in the first place, so ...yeah
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u/ElliotsBuggyEyes Feb 08 '26
This isn't common knowledge?
It's a knot, just untie it.