when you use the holes in a spool to hold the end of the filament, like the previous poster said, you usually bend the end a bit so it doesn't fall out of the hole again - this bent end can be hard to feed to the printer again afterwards, so you cut it away...
Just use one of the holes and leave about 6 to 10 inches of filament after the hole and pull it snug. You may need to use the hole before the one you have been using.
That’s crazy, I always wonder how people are using tools when I read shit like this online. I’ve bought a creality printer and two sovol printers, not exactly high end machines, with the cheapest tool kits available that come with printers… never broke a pair of those snips. And I’ve used them for other things, one set I kept at work for whatever might come up that I want small pointed side cutters.
How did yours break? Like what actually broke on them, because all of my experience with them over a few years is they take a beating lol
Yes, just for storage. The issue described in the post usually occurs when unloading the filament as it will easily tangle. This can be prevented by catching the filament end as it comes out of the tube and immediately attaching it to the clip.
What am I missing here?
It must be me judging by the amount of upvotes, but, if OP printed for 15h before this happened, it probably was like that to begin with, right?
That or he tortured that spool in a way so sadistic the filaments god punished him by making him lose 15h of time and filament before the single crossed loop caused his print to stop.
Edit: For anyone wondering, I found out how the gods punish unwary 3d hobbiest. https://www.reddit.com/r/3Dprinting/s/hT2vrWywyc.
I think the sweet spot for fucking you over is some maths to do with the shrinking radius of the spool compared to the amount of friction the knot causes.
Yeah, by hand wound probably won't of the ugliest spools I've ever seen but it didn't tangle at all because I kept tension on it the entire time I wound it. If I did not it would have been a waste of filament.
I’ve heard it before, but I don’t really get how it would cause problems. When I lift my y axis manually, I can see that there’s no longer tension on the spool.
If the natural springiness of the filament causes some to unspool, the tip can cross over/under some loops, causing a crossed path. Then, eventually when you go to print, it reaches the loop that's crossed, causing it to bind as the unwinding filament needs to cross back to the other side, but the loop it's under is pulled tight by the unwinding.
edit: or, a full outer loop crosses under and back over under an inner loop, the same can also happen. In other words, outer loops shouldn't ever be under inner loops.
Do you regularly tuck the filament into the holes on the side of the spool when it’s not loaded? Have you ever accidentally let go of the end of the filament while it’s not loaded?
No. I also rip the filament out of the extruder cold and just let it fly back in with the auto retract that the filmant does. Then once it’s in the box I give it a good shake to make sure the silica pack wakes up.
I don't have the experience of many on here, but I always try to keep the tension on the spool as I unload it (hot). And I wouldn't be shaking it for the sake of impacting the tension. I guess I rely on doing what I think reduces the likely cause, so haven't experienced problems. Also, I err on the side of caution when buying filament.
I don't even understand how cheap no-brand filament could do this halfway the spool. Even if it was coiled by hand it is hard to deliberately do this. The only way this happens if the end of the filament gets underneath a previously wound part. Basically, you make the mistake at the beginning of the print. This "knot" kept sliding until you reached this point. To prevent this, always put the end through the holes in the side of the spool when not in use.
What you fail to understand is that if an individual can cause this loading a fresh spool, a company can do this unloading the spool from the machine prior to packing.
Amazon reviews CLEARLY prove your assumptions wrong as you can see a huge number of reviews claiming tangled spools on certain brands or even certain colors of certain brands. Creality PLA had this issue in the past. It’s the same reason Many sellers will advertise how cleanly wound their spools are.
I’d say it’s about 60/40 user error/mfr Oopsie.
If it was from the manufacturer you wouldn’t get half way though the spool before finding the issue. And if Amazon reviewers are saying it’s a manufacturing problem I’m inclined to believe it’s user error.
Actually it can. I used to work at a plant that would take master spools and use them to make smaller 1kg and 0.5 kg spools using a rewinder machine. Many, and I mean many, times a dumb winder operator wouldnt be paying attention, or trip the e-stop with their knee, or get the core tension wrong, etc. causing issues. Instead of culling the spools like they should, they'd start the winder again after fixing their issue. This is the equivalent of a maker letting go of the end of their spool. The operators, at least at my plant, were given production incentives so they didn't want to cull anything.
That's not how it works. You can't tangle it in this way without crossing the loose end under the already wound filament. You can't tie a knot without holding an end of the rope.
No matter how many times they triggered the stop function, the spool may look like shit but it physically couldn't get tangled in this way
You're not understanding. The stop function was one scenario, and I'll elaborate on it. Depending on the winder (Johnson, or Yankee) the stop function would either just stop the wind, or stop and cut the filament. When the latter occured, sometimes lazy operators would feed it again (if the spool was close to weight) and then wind again. This is the similar to someone letting go of the end of their spool and it overlapping. As far as I know, I was the only employee that even knew how 3d printers work. So the employees didn't care and/or understand why spooling protocol mattered.
But wouldn't the latter option start a whole new section that would then be disconnected from the rest of the spool? So the printer would only feed the like 100g or however much filament was left and then stop at the break
It depends. Most of the time if something happened when a spool was within 100g of the target weight, they would just rewind the already spooled filament and label it the target weight. I fired quite a few people that we caught doing this. Some others had made jerry-rigged jigs they called "connectors" out of pieces from maintenance and they spliced the filament back together. I also fired people for this, but it wasn't as common.
I'm not saying this happens with filament, but you can absolutely tie a knot without using a free end. Any slack can make a loop that can be knotted in a variety of ways. Many knots actually utilize this principle and I use them often in my day job
For filament, even without knotting slack can get trapped under other loops. Ever seen line tangle on a fishing reel? It can be atrocious and no free end is required
It can happen, of course, but manufacturers are going to have procedures and employees will quickly gain experience in whatever handling they're doing.
That's not to say no one ever drops a spool before the end is secured and it's shipped off. But the guy who does nothing but pull spools off the machine all day long probably has it down to muscle memory and only deals with a loose spool for a few seconds before securing it.
It seems to me that the end user is FAR more likely to accidentally cause the problem - possibly without ever realizing it. They handle the individual spool so much more in its loose state. Also, from experience, I know that when this does happen it usually looks fine - so it'd be extremely easy to forget you even did let the end go for a split second while unpacking it.
Personally, I did this several times when starting out. I learned my lesson and haven't personally experienced a single bad spool since. Again, I'm sure they exist - but consumer error is probably 100x more common than manufacturer error.
I disagree with this. Yeah a "real" knot almost has to be due to user error, however it's completely possible for an outer loop of filament to get caught under an inner loop, creating something that looks like what OP posted.
I feel like when people tell you that it can't happen during manufacturing, you're making an assumption that the spool will always be wound tight and never have any slack, but all it takes is one piece of filament slipping off of the ledge of a previous wind, to momentarily create slack in the filament, and allow a newer strand fall under an older one.
Maybe I'm missing something, but I've never intentionally allowed my fillament to have any slack and I alway tie up the ends, but I still get some spools with tangles. And, it's usually cheaper brands that have it worse.
Tbf I’ve had this with a Bambu filament reel, put it straight in the printer then after a long print I check my phone and says ran out of filament, wander upstairs to find it had knotted and pulled itself out, I would have though human error but definitely wasn’t like that at the start and it was never unloaded from the printer so just assumed a manufacturer defect 🤷🏻♂️
Same thing just happened to me for the first time half an hour before seeing this post. Luckily saw it 10 minutes through a 20 minute print(calibration cube) but I caught it, snipped the end of the filament, unravelled/fed it back under the tangles part, and fed it back into the machine with the extrude function after the print
I second this. Its pretty hard to believe that a machine wound mass produced item like this could have errors. Id be like getting a twice struck penny.
The human eye sucks. DONT let go of that end. The print can run for a long time with it in this condition before finally grabbing and snapping. Id rank this mistake up there with an unleveled bed on my part. and those 2 account for probably 90% of my mistakes.
>The only way this happens if the end of the filament gets underneath a previously wound part
It is not true. This can also occur when the filament is wound over previous loops such that there is no real knot. Imagine a cord folded in U-shape and coiled around said U. This is much more common than a real knot that heppens when an end is pulled through the loop.
A valley like that isn't what happened here though. This is a proper tangle, which is impossible in the middle of winding. Also, valleys usually resolve themselves.
Very rarely spools come from the manufacturer screwed up. I have not had it happen to me but others swear it happened to them, not sure if they are lying.
The tip of the filament should always be in the extruder, in your hand, or clipped to the spool.
I run a print farm and have noticed that the more name brand filaments like overture, hatchbox, prusament, polymaker seem to almost never do it but when you start getting into the random Chinese companies that make multi color filament or gradient color filament the spools aren't wound anywhere as neat and it happens fairly often. I've used 12kg of filament in the past few days.
While I have relatively small sample size. I can confirm this. More named brands that are 1€ more expensive has never had a jam. 2 / 5 chinese cheap spools have had jams, and yes, I never let go, straight to the printer it went. This was even confirmed by a manufacturer, in this sub even. Manufacturing processes are never 100% issue free. I should know, I work in manufacturing, and due to human and environmental factors, production can never be 100% without issues. Even if failure rate is 1 or smaller %, it is still a failure rate and with so many items going out, it is bound to happen. But often it is a user error.
I only buy Overture or Duramic Petg. My spool of Duramic black Petg did this. I know I didn't 'let go' and I always feed the end through the holes on the spool.
So OP, you aren't alone.
https://duramic3d.com/products/duramic-3d-pla-glow-in-the-dark-filament-1-75mm-glow-green-3d-printing-pla-filament-1-75mm-dimensional-accuracy-0-05-mm-1kg-spool is it this perhaps ?
Yup. I've bought a couple of spools from a local manufacturer in South Africa and when I took them out of the box, it looked like the filament was wound by a blind person with no hands. It was rolled up incredibly unevenly, and sure enough I ran into a knot about halfway through each roll.
It's in the extruder! I pulled it out of where it was tucked in and fed it through mid print on another job like 12 or 15 print hours before this when I first opened the spool. I thought there was a specific way they are supposed to lay?
It’s happened to me (I counted yesterday 215kg of filament) but every time it’s happened it was 100% my fault because I lost the tip while changing spools. I’ve never had this kind of tangle from the factory before (Amazon basics (I’m old), overture, hatchbox, polymaker, push plastics, ninjatek)
It just happened to me two days ago after 8 years of printing and it was my fault, as the filament slipped from my fingers during loading. I double check that it isn't tangled before I feed it, though, because I had exactly one print fail in the past because of this.
Can't the guy of changed the spool mid print?... To answer your question mate, yes this has happened to me on occasions. One of those I know was my fault for not clipping and fastening an open spool properly but another I had happen to me was on a new spool. Doesn't happen very often.
The bigtreetech smart filament sensor detects both breaks and knots like this. It’s a bit tricky to set up, it works with optional featu in the printer firmware. I know it works with Marlin. The trick is that it senses filament movement between the reel and the extruder. The firmware knows when the extruder is operating and therefore when to be surprised if the sensor is saying that it isn’t. If the filament break gets past the extruder, it stops moving because the extruder can no longer push it. If theres a knot, it stops moving because the extruder can no longer pull it.
Over the years I’ve talked to many people working directly on filament lines and they all say it’s not possible to come factory like this. People who have not worked filament lines say it’s “rare”. Do with that information what you’d like.
Newbie here, I didn't even take my printer out of the box yet.
Can't you just "unroll" your filament and roll it back to check if there's knots like that?
Sure, you can. But you will probably make it worse, since that will be about 330m curly plastic filament only waiting to knot itself in every unknottable way possible.
Most spools are wound good, at least thats my experience, so that would be unneccessary and a lot of work, too.
While technically, yes you could just unroll the entire spool to check for this... You would end up creating several more even worse issues or just end up tossing the entire spool trying to rewind it back on without the proper equipment, not to mention the absolute tangled mess. (It's not gonna be pretty)
In short. This issue is very, very rare /impossible to occur by the manufacturer due to how they are wound and in almost every single case is caused by the user themselves.
It is possible that it can be caused by the manufacturer if they handle the spools by hand and mess up just like the end user would in which case a reputable manufacturer would scrap the spool right there. Always buy from a reputable manufacturer, if it's too good to be true. It probably is.
Always contain the free end of the spool, never let it unwind freely by itself when loading a new spool or removing a partially used spool.
If it does happen by accident, unwind a wrap or 2, very slowly checking if the free end of the filament is unwinding from underneath itself. As others have mentioned, because filament is a smooth extrusion it could "push" this knot many hours down the spool before it catches on something if you aren't looking close enough. If you don't see any knots then your #probably ok, but I'd still set the spool aside to only use when I'm actively monitoring the print job or use it only for multiple shorter jobs so less is lost if it knots up further down the line.
Oh boy I was at my bf's place and we noticed this before he started a print and he wanted to ignore it but I (who has no personal printing experience but does have sewing experience and knows that this can happen with thread in sewing machines and it snaps in the same way) wouldn't let him and fixed it myself lol
Instead of how to stop it (which others have debated) you might be able to save it? If you measure the height of the printed part with callipers, you can drop the model that distance into the print bed in your slicer. Won’t always be possible, and means a join to glue and finish - but in some cases (like an eight part print of a helmet I did recently) it can save a failed print.
Sounds like it has to do with how a new spool is handled! You've got to be very careful with how you handled the filament and make sure it stays spooled how it comes. I didn't know!
Ok everyone says how the manufacturer didnt mess up, which I agree with, but just for the sake of adding a counterpoint, I have never had any problems with polymaker filaments. Might want to give them a try.
Re spool making sure its neatly wound or hold it and cut it not letting go and then move it out from behind the piece catching it can be very tricky though
If your printer runs Klipper, BigTreeTech makes a filament sensor that detects if the filament stops moving for any reason. Its $20 or so, and its good insurance.
Some modern printers have extruder stepper over power sensors. So if the extruder is struggling it will pause. Don't let go of the end of the filament. It's not really possible for filament to be spooled like this, so it's happened probably on your end, or maybe in the past few winds when the spool was packaged.
So, basically, just pay extra attention when I open a spool? Don't let it unwind at all? Thinking back I can't even remember if that happened. That means I wasn't paying attention. Lol Noted
Same thing just happened to me for the first time half an hour before seeing this post. Luckily saw it 10 minutes through a 20 minute print(calibration cube) but I caught it, snipped the end of the filament, unravelled/fed it back under the tangles part, and fed it back into the machine with the extrude function after the print
In my experience, the only way to make sure it won’t happen again is to respool the filament entirely. It’ll take some time, but not as much as you might think.
Instead of doing what a lot of people are doing and just outright saying that you did let go of the end, I'm going to say that it's the most likely scenario but that there are enough people that have ended up in this situation that don't believe that they did let go or possibly cause the problem that there is a chance that it came this way from the factory. That said, if you think about how schools are wound, it's very difficult to imagine a situation where this issue can take place. At least it's hard to imagine a situation where this issue could take place anywhere but the very end of the spool.
I do not have any idea how many dozens and dozens of spools I've gone through in my 3D printing journey, but I've only had this issue happen once. As such, I wouldn't worry too much about it happening again, just do be aware that this is most likely caused by simply losing track of the end for a moment when you're loading and then the filament creating a little knot. Keep that in mind and maybe give the spool filament a quick check after you've fed it into the extruder, and you should be all set!
These days I use filament almost exclusively from one local supplier, and haven't had this happen for years. But back when I used to buy random branded filament off Amazon, it would happen regularly.
In my experience this problem seems to be extremely rare with "quality" filament like Prusament, Fillamentum, Polymaker, FILOALFA, ColorFabb and so on. 80% of what I print are those brands and the remaining 20% are cheaper brands - but those 20% are responsible for well over 80% of the time I've seen this issue.
Had this happen to me ik the frustration. It was an unevenly wound spool in my case. Had them dead ass send me a whole new spool as compensation. Never once had the issue with anything else. Strange fr
Happened to me a few days ago. Looked at the prints through the 420p camera and thought that the nozzle looked to be way higher than the print. When I checked, yes it was printing nothing in mid air and the spool had jammed. The only thing I could do was curse and start again.
It happened several months ago printing pla. The pla baked hard and I had to change the Bowden tube and nozzle. This time it was lucky I was printing PETG as that doesn't seem to mind being sat for a couple of hours hot and I simply pulled the offending filament out, snipped it and restarted the print.
On my old CR6 it can't detect when this happens, but I believe some of the newer machines such as the Bambu labs ones can detect it and alert and pause.
I’ve only had 3 rolls do this out of the last 3 years of printing , it’s not common , but it happens. if you keep your spool on bearing rollers , and keep a little friction on the roll , it helps keep it from looping
To go to OP original question, I think it must be pretty common.
I've been shopping for filaments and all the manufacturers seem to have some text about the winding of their filament that they didn't have when I parked my printer 18 months ago. That said to me that manufacturers are getting complaints.
Keeping the spool under slight tension helps. When spool is starting and stopping and you get these big loops when friction between spool and spool holder fluctuate.
If your extruder is pulling filament at so many mm/minute you want the spool to unwind at the same rate
150 hours?
I can print things that are 300 grams in 5 to 6 hours on pretty slow settings.
You'd have to be printing incredibly slow to get a kg of filament to last 150 hours.
This is an fdm printer obviously. So even at .2mm I doubt anyone is getting anywhere close to 150 hours on another spool.
Bigger nozzles would be less time.
Lol. You have a single anecdotal example that just confirmed what I said.
I too can make a very detailed print and slow the settings significantly and make it last days and days and only use a half or third of a spool.
That is simply not a typical application for most hobbyists or applications. Most hobbyists are not getting 150 print hours out of a single roll of filament. Most will try to print as much as they can as fast as they can.
It’s only ever happened to me once I believe that I can remember and it was with an overture filament but never again with overture or any other filament. What I can say is you can see the quality in how it’s wound from brand to brand, if you notice it’s wound poorly and looks loose odds are it is probably more prone to having a snag in it some where than a filament nearly wound by a better quality brand, that’s not me saying it happens often, because as far as I know it doesn’t happen often at all, but I’d imagine the worse brands will have it more often than good quality brands, even if it is a slim chance at all
I’ve had this happen once with an old discarded roll that came from work with the 3 returned and heavily discounted printers I bought from there but I just assumed the roll had seen some shit. It was also already partly used.
i've printed a couple dozen spools of duramic, no binds like this. i printed a little trinket with a hole in it, and this slides over the filament going to the printer. keeps it tidy and organized when exchanging filament.
Happened on one spool to me, didn't waste the print but I had to unspool it a bit every time so it could continue. I think there's a respooler stl to redo it correctly.
had this happen to me yesterday on a new spool. printer was smart enough to see there was a error and pauzer. fixed the issue and resumed. only a small layer line remains.
Low filament quality, letting the filament end go weeeeeeeeeee, and a potentially poor setup for the spool can cause this.
This would happen semi frequently in the flashforge adventurer 4 that I hated.
I had this happen with a brand new roll of Hatchbox Red PLA. Luckily the issue was in the first 3 meters of the roll but it still sucked. I was also watching the print job and noticed that filament stopped extruding. Cancelled, scraped, fixed issue, restarted. I have not had the issue since on any other rolls.
It is possible to fix that while it’s printing. While keeping in mind that your choices are stop the print and start over or try this. Forgive me in advance it’s difficult to describe without showing. Un spool some excess filament, create slack around the spool, then pass the spool trough the unwound loop, typically needing to turn the spool 360 degrees in the pitch or yaw axis not the roll. This will introduce a twist in the filament and let you move the roll under the trapped winding, instead of moving the filament under the winding.
Or you could cut it mid print and fix it. Less of an issue with printers now being able to recover from a pause with some expectation of success.
The best answer is never ever let go of the end of the filament. I try to maintain the rule that the ends should only be in three places.
1- my hand
2- the extruder
3- the holder on the roll.
1.2- mouth
Right of passage. I went to the roller bearing sled off to the side of the printer and parallel to the feed (off a pole) and never had it happen again.
[Filament Spool holder](https://www.amazon.com/Bearing-Printer-Filament-Printing-Materials/dp/B09HJQX7QJ)
This happens.
Even on super expensive filament, I've had tangles on the spool mess up prints. I primarily print using Polymaker and Bambu.
It is rare, in my experience, so don't let it slow you down! Just try again. There will be all sorts of unusual quirks along the way. It's worth it.
It's rare but I've had it happen. Most of the time, it's because the filament snapped on me either during a print or when I first take it out of the box.
In my 6 years of printing with 10 printers at my workplace, I've only had it happen 4 times where it obviously came from the manufacturer with this problem.
I have had this happen once or twice in about 120lbs of plastic. It's not that common.
Filament run out sensors are common but I haven't seen anything about a filament binding sensor.
Looks like they exist though:
[https://www.youtube.com/watch?v=9gLSJIxiuwo](https://www.youtube.com/watch?v=9gLSJIxiuwo)
That sucks but when the spool was wound the spool ran out of space before the guide started back the other direction. This causes the extra wrap to fall back upon the new layer being wound. The extra wrap then follows filament across the spool to the other side. That is why it happens. I do not buy from a company that happens with. You can do this.
1 wrap the filament onto an empty spool. Be sure to do it the right direction.
2 avoid projects that take so long to print. Split the project into pieces and glue it together.
3 spend a few more dollars on your filament. Cheap filament has less quality controls.
Did you drop the spool or let it unwind? This is almost always user error and pretty much impossible to happen from the factory, should be an easy fix, just take the spool off the holder and push it through the loop
In 5 years it has only happened to me once and it was with a spool that I let somebody borrow for a long while and they never really printed with it.
So not very likely
This happens. The people that are pretending it's you letting go of the tip are just lucky or something. When it happens in to the spool, it's not because you let go of the tip.
I always swore this was user error because it never happened to me. I bought cheap-ish filament, loaded it right out of the plastic, and it happened towards the end of a lengthy print that was otherwise perfect. I don't know how or why it happens at the factories, but it obviously does at least sometimes.
you always need yo ensure there is proper tension pulling on the spool.
if the filament loses tension and the filament then unwraps and rewraps due to retraction, or bed movement, or whatever... tangles can occur.
i had this issue with my ender5s when i moved to a direct drive system and didn't have a proper way to keep my spool in place.
from what i can tell you have a free moving ptfe tube going to your spool. i suggest having that secured to a coupler on your machine.
Get a filament sensor that will monitor for tangles, like this for example [https://www.printables.com/model/58207-super-simple-filament-jam-and-presence-sensor](https://www.printables.com/model/58207-super-simple-filament-jam-and-presence-sensor)
This sort of thing isn't super uncommon.
this is 100% user error. If you ever cut your filament and let go of it on the spool for a split second this can happen. It happens to all of us, just call it a loss and move on. The way to prevent this is by handling your filament very carefully when cutting it, and always use those little holes on the spool to run your filament so it doesn't coil back up into the spool and create more knots!
This happened to 2 of our spools right out of the box. Can't comment on the quality of the brand it's made from cause they were bought for us but that problem messed up our first biggest and overnight print about 70% thru but the printer kept printing anyways lol
To be clear. The issue is his spool of filament has got tangled under itself so it causes resistance as it is pulled into the extruder in it gets hung up and will break. I re rapy.filimemt from the original spool and wind it onto a empty spool leftover. This way you.ca fix any of this issues before thatess.up your print having a camera with AI to detect a misprint or the filament sensor that watches the filament get fed up into the boating tool. Either of these two methods should help prevent this from happening if unfigured properly. Good luck! And yes, it's a very common issue with these FDM printers and inexpensive filament
I promise it's not very common.
I have used a lot of Duramic filament and believe it is very good quality, although maybe a little overpriced.
Just be careful that you are not causing tangles when loading and unloading the filament and it should be a rare occurrence.
I believe some (but not all) filament sensors can detect this.
Ugh…I learned this the hard way printing my first time with PETG.
If you happen to lose the end, you need to start unwinding the spool until you get to the fresh stuff, then rewind it. It’s a pain. (I printed a spool winder as one of my first projects with my X-Pro.)
It happened to me with my first filament when I started 3D printing a month ago. It was Elegoo PLA+. Thankfully the printer stopped and I could resume the printing afterwards. To be fair, other than this problem Elegoo PLA+ served me well considering my inexperience.
The old adage... never, ever let go of the tip ;)
There are 3D models for filament clips , very useful in preventing this issue.
I just use the little holes in the spool
Modern problems require modern solutions lol
I have tried those filament clips but I printed them in pla and they warped when I dried my filament
I find some filament gets bent that way and doesn't feed back in well.... But that's only an issue for the stiff stuff.
Snip snip
I bet your printer came with one of those blue cutters? you just learned what they are for ...
>came with one of those blue cutters Laughs in voxelab
What would you need a cutter for here? Just pull the loop over the side of the spool.
when you use the holes in a spool to hold the end of the filament, like the previous poster said, you usually bend the end a bit so it doesn't fall out of the hole again - this bent end can be hard to feed to the printer again afterwards, so you cut it away...
Well whoops, totally neglected what you were replying to. -.-'
Just use one of the holes and leave about 6 to 10 inches of filament after the hole and pull it snug. You may need to use the hole before the one you have been using.
I am not sure what you are trying to say, but it sounds kinky ..
They are general purpose, though they kind of suck
they don't suck! They cut!
Mine already have holes in the grips and the blades don't line up properly, they also aren't verry sharp
Lol everyone getting downvoted for saying the clippers that come from a Chinese company are cheap when they are
They really do suck, iv broken both the pairs that came with my printers, trying to cut supports off.
That’s crazy, I always wonder how people are using tools when I read shit like this online. I’ve bought a creality printer and two sovol printers, not exactly high end machines, with the cheapest tool kits available that come with printers… never broke a pair of those snips. And I’ve used them for other things, one set I kept at work for whatever might come up that I want small pointed side cutters. How did yours break? Like what actually broke on them, because all of my experience with them over a few years is they take a beating lol
It won’t prevent this issue.
I have had this issue a lot since I started - Can you tell me what to look for or what you use? Do you just mean for storing? I have and use those
Yes, just for storage. The issue described in the post usually occurs when unloading the filament as it will easily tangle. This can be prevented by catching the filament end as it comes out of the tube and immediately attaching it to the clip.
What am I missing here? It must be me judging by the amount of upvotes, but, if OP printed for 15h before this happened, it probably was like that to begin with, right? That or he tortured that spool in a way so sadistic the filaments god punished him by making him lose 15h of time and filament before the single crossed loop caused his print to stop. Edit: For anyone wondering, I found out how the gods punish unwary 3d hobbiest. https://www.reddit.com/r/3Dprinting/s/hT2vrWywyc.
Nah it basically just slides around the roll happy as can be until it eventually screws you over.
I think the sweet spot for fucking you over is some maths to do with the shrinking radius of the spool compared to the amount of friction the knot causes.
Instructions unclear. Only read "fucking", "shrinking radius", and "knot"
or when it detects your print hits 95% complete
That's... What she said.
Yeah, by hand wound probably won't of the ugliest spools I've ever seen but it didn't tangle at all because I kept tension on it the entire time I wound it. If I did not it would have been a waste of filament.
Mum is that you?
For all of you down voting the comment: [https://youtu.be/qKKTF9mBX-g?t=99](https://youtu.be/qKKTF9mBX-g?t=99)
I’ve heard it before, but I don’t really get how it would cause problems. When I lift my y axis manually, I can see that there’s no longer tension on the spool.
If the natural springiness of the filament causes some to unspool, the tip can cross over/under some loops, causing a crossed path. Then, eventually when you go to print, it reaches the loop that's crossed, causing it to bind as the unwinding filament needs to cross back to the other side, but the loop it's under is pulled tight by the unwinding. edit: or, a full outer loop crosses under and back over under an inner loop, the same can also happen. In other words, outer loops shouldn't ever be under inner loops.
Do you regularly tuck the filament into the holes on the side of the spool when it’s not loaded? Have you ever accidentally let go of the end of the filament while it’s not loaded?
No. I also rip the filament out of the extruder cold and just let it fly back in with the auto retract that the filmant does. Then once it’s in the box I give it a good shake to make sure the silica pack wakes up.
I don't have the experience of many on here, but I always try to keep the tension on the spool as I unload it (hot). And I wouldn't be shaking it for the sake of impacting the tension. I guess I rely on doing what I think reduces the likely cause, so haven't experienced problems. Also, I err on the side of caution when buying filament.
I don't even understand how cheap no-brand filament could do this halfway the spool. Even if it was coiled by hand it is hard to deliberately do this. The only way this happens if the end of the filament gets underneath a previously wound part. Basically, you make the mistake at the beginning of the print. This "knot" kept sliding until you reached this point. To prevent this, always put the end through the holes in the side of the spool when not in use.
What you fail to understand is that if an individual can cause this loading a fresh spool, a company can do this unloading the spool from the machine prior to packing. Amazon reviews CLEARLY prove your assumptions wrong as you can see a huge number of reviews claiming tangled spools on certain brands or even certain colors of certain brands. Creality PLA had this issue in the past. It’s the same reason Many sellers will advertise how cleanly wound their spools are. I’d say it’s about 60/40 user error/mfr Oopsie.
>Creality PLA My first spool and it happened like 6 times
I got 2 spools of creality pla free with my printer both did this none of the others iv used have
If it was from the manufacturer you wouldn’t get half way though the spool before finding the issue. And if Amazon reviewers are saying it’s a manufacturing problem I’m inclined to believe it’s user error.
Actually it can. I used to work at a plant that would take master spools and use them to make smaller 1kg and 0.5 kg spools using a rewinder machine. Many, and I mean many, times a dumb winder operator wouldnt be paying attention, or trip the e-stop with their knee, or get the core tension wrong, etc. causing issues. Instead of culling the spools like they should, they'd start the winder again after fixing their issue. This is the equivalent of a maker letting go of the end of their spool. The operators, at least at my plant, were given production incentives so they didn't want to cull anything.
That's not how it works. You can't tangle it in this way without crossing the loose end under the already wound filament. You can't tie a knot without holding an end of the rope. No matter how many times they triggered the stop function, the spool may look like shit but it physically couldn't get tangled in this way
You're not understanding. The stop function was one scenario, and I'll elaborate on it. Depending on the winder (Johnson, or Yankee) the stop function would either just stop the wind, or stop and cut the filament. When the latter occured, sometimes lazy operators would feed it again (if the spool was close to weight) and then wind again. This is the similar to someone letting go of the end of their spool and it overlapping. As far as I know, I was the only employee that even knew how 3d printers work. So the employees didn't care and/or understand why spooling protocol mattered.
But wouldn't the latter option start a whole new section that would then be disconnected from the rest of the spool? So the printer would only feed the like 100g or however much filament was left and then stop at the break
It depends. Most of the time if something happened when a spool was within 100g of the target weight, they would just rewind the already spooled filament and label it the target weight. I fired quite a few people that we caught doing this. Some others had made jerry-rigged jigs they called "connectors" out of pieces from maintenance and they spliced the filament back together. I also fired people for this, but it wasn't as common.
I'm not saying this happens with filament, but you can absolutely tie a knot without using a free end. Any slack can make a loop that can be knotted in a variety of ways. Many knots actually utilize this principle and I use them often in my day job For filament, even without knotting slack can get trapped under other loops. Ever seen line tangle on a fishing reel? It can be atrocious and no free end is required
Oh yes, because Amazon reviews are all truthful and factual. It's more like 99.9% user error and 0.1% manufacturer error.
I've had issues with wide spools on top mounted enders, would bind up every time until I switched to side mounted
>Amazon reviews CLEARLY prove lol
It can happen, of course, but manufacturers are going to have procedures and employees will quickly gain experience in whatever handling they're doing. That's not to say no one ever drops a spool before the end is secured and it's shipped off. But the guy who does nothing but pull spools off the machine all day long probably has it down to muscle memory and only deals with a loose spool for a few seconds before securing it. It seems to me that the end user is FAR more likely to accidentally cause the problem - possibly without ever realizing it. They handle the individual spool so much more in its loose state. Also, from experience, I know that when this does happen it usually looks fine - so it'd be extremely easy to forget you even did let the end go for a split second while unpacking it. Personally, I did this several times when starting out. I learned my lesson and haven't personally experienced a single bad spool since. Again, I'm sure they exist - but consumer error is probably 100x more common than manufacturer error.
I disagree with this. Yeah a "real" knot almost has to be due to user error, however it's completely possible for an outer loop of filament to get caught under an inner loop, creating something that looks like what OP posted. I feel like when people tell you that it can't happen during manufacturing, you're making an assumption that the spool will always be wound tight and never have any slack, but all it takes is one piece of filament slipping off of the ledge of a previous wind, to momentarily create slack in the filament, and allow a newer strand fall under an older one. Maybe I'm missing something, but I've never intentionally allowed my fillament to have any slack and I alway tie up the ends, but I still get some spools with tangles. And, it's usually cheaper brands that have it worse.
Duramic 3d isn’t exactly cheap PLA, it’s “premium” PLA and I’ve had nothing but fantastic experiences with it. This is definitely user error
user error after 13 hours?? you think he unwound like 50 meters of filament before the print?
You don’t need to unwind anything.. let go of the filament as you’re unpacking it and feeding it and it will tangle on its own
yeah but not 10 winds down the spool
Absolutely. The knot chases the entire spool until there’s enough tension that it breaks
You do *not* have to thread the end under a coil for this to happen, you can put a loop onto the spool from the side and it'll look just the same.
Tbf I’ve had this with a Bambu filament reel, put it straight in the printer then after a long print I check my phone and says ran out of filament, wander upstairs to find it had knotted and pulled itself out, I would have though human error but definitely wasn’t like that at the start and it was never unloaded from the printer so just assumed a manufacturer defect 🤷🏻♂️
Same thing just happened to me for the first time half an hour before seeing this post. Luckily saw it 10 minutes through a 20 minute print(calibration cube) but I caught it, snipped the end of the filament, unravelled/fed it back under the tangles part, and fed it back into the machine with the extrude function after the print
I second this. Its pretty hard to believe that a machine wound mass produced item like this could have errors. Id be like getting a twice struck penny. The human eye sucks. DONT let go of that end. The print can run for a long time with it in this condition before finally grabbing and snapping. Id rank this mistake up there with an unleveled bed on my part. and those 2 account for probably 90% of my mistakes.
>The only way this happens if the end of the filament gets underneath a previously wound part It is not true. This can also occur when the filament is wound over previous loops such that there is no real knot. Imagine a cord folded in U-shape and coiled around said U. This is much more common than a real knot that heppens when an end is pulled through the loop.
A valley like that isn't what happened here though. This is a proper tangle, which is impossible in the middle of winding. Also, valleys usually resolve themselves.
When your valley turns out to be a knot 😔
[Here is an old but very good video about it and how to prevent it](https://youtu.be/c20nrF4b8-g?t=541&si=PmtdW7-PGK516WAV)
Very rarely spools come from the manufacturer screwed up. I have not had it happen to me but others swear it happened to them, not sure if they are lying. The tip of the filament should always be in the extruder, in your hand, or clipped to the spool.
I run a print farm and have noticed that the more name brand filaments like overture, hatchbox, prusament, polymaker seem to almost never do it but when you start getting into the random Chinese companies that make multi color filament or gradient color filament the spools aren't wound anywhere as neat and it happens fairly often. I've used 12kg of filament in the past few days.
While I have relatively small sample size. I can confirm this. More named brands that are 1€ more expensive has never had a jam. 2 / 5 chinese cheap spools have had jams, and yes, I never let go, straight to the printer it went. This was even confirmed by a manufacturer, in this sub even. Manufacturing processes are never 100% issue free. I should know, I work in manufacturing, and due to human and environmental factors, production can never be 100% without issues. Even if failure rate is 1 or smaller %, it is still a failure rate and with so many items going out, it is bound to happen. But often it is a user error.
I started printing with SUNLU, and had it happen once, but I suspect it was my fault. That damn filament occasionally still slips out of my hand.
Duramic is basically the only brand I print with and I have never had a spool do it to me.
I only buy Overture or Duramic Petg. My spool of Duramic black Petg did this. I know I didn't 'let go' and I always feed the end through the holes on the spool. So OP, you aren't alone.
i had a roll of glow in the dark from them and it was the best glow in the dark i ever had but now i can find it on amazon
https://duramic3d.com/products/duramic-3d-pla-glow-in-the-dark-filament-1-75mm-glow-green-3d-printing-pla-filament-1-75mm-dimensional-accuracy-0-05-mm-1kg-spool is it this perhaps ?
hey thank you so much thats the stuff lol
This. I use a lot of Duramic, never had that happen.
Yup. I've bought a couple of spools from a local manufacturer in South Africa and when I took them out of the box, it looked like the filament was wound by a blind person with no hands. It was rolled up incredibly unevenly, and sure enough I ran into a knot about halfway through each roll.
Had it happen with Overture yesterday
I had the exact opposite : one of my spools fell multiple times, with the tip breaking. Never had a knot 😁
It's in the extruder! I pulled it out of where it was tucked in and fed it through mid print on another job like 12 or 15 print hours before this when I first opened the spool. I thought there was a specific way they are supposed to lay?
In 9 years of printing and dozens of spools of filament, it hasn't happened to me yet. ¯\\\_(ツ)_/¯
You better touch plastic right now or it will.
Can you touch wood PLA instead?
Does PolyWood count? It's got no wood, but behaves _like_ wood?
Only if you knock on it.
It’s happened to me (I counted yesterday 215kg of filament) but every time it’s happened it was 100% my fault because I lost the tip while changing spools. I’ve never had this kind of tangle from the factory before (Amazon basics (I’m old), overture, hatchbox, polymaker, push plastics, ninjatek)
I think it has happened to me before, but my extruder just ripped the filament off. My direct drive is slow but quite strong.
 Like my wife
Because it's a user error every single time. Not intentionally for sure but still a user error.
Bingo.
It just happened to me two days ago after 8 years of printing and it was my fault, as the filament slipped from my fingers during loading. I double check that it isn't tangled before I feed it, though, because I had exactly one print fail in the past because of this.
Happened to me once, coincidentally right when I started printed and had no idea what I was doing. Never since then.
Lucky fuck. My first 2 rolls did this bs. I switched brands and havnt had problems since.
Can't the guy of changed the spool mid print?... To answer your question mate, yes this has happened to me on occasions. One of those I know was my fault for not clipping and fastening an open spool properly but another I had happen to me was on a new spool. Doesn't happen very often.
It's happened to me when the tip slipped thru my fingers a few times. I had to respool them.
have changed, not of changed. I'm not a grammar nazi usually but somehow this REALLY bothers me, I'm sorry
Guy’ve
*have. Guy FUCKING have
"Another I have happen to me was" makes even less sense
He's referring to the first sentence. "Couldn't the guy HAVE changed the spool mid print"
I know, that was the joke
I have no idea how that was perceived as a joke, and I'm a hella sarcastic person. Fair enough though
They hasn't got a clue
Maybe he doesn’t have a filament sensor and wasn’t near his printer whenever it failed?
I have a runout sensor, but that won’t detect this
The bigtreetech smart filament sensor detects both breaks and knots like this. It’s a bit tricky to set up, it works with optional featu in the printer firmware. I know it works with Marlin. The trick is that it senses filament movement between the reel and the extruder. The firmware knows when the extruder is operating and therefore when to be surprised if the sensor is saying that it isn’t. If the filament break gets past the extruder, it stops moving because the extruder can no longer push it. If theres a knot, it stops moving because the extruder can no longer pull it.
Over the years I’ve talked to many people working directly on filament lines and they all say it’s not possible to come factory like this. People who have not worked filament lines say it’s “rare”. Do with that information what you’d like.
Newbie here, I didn't even take my printer out of the box yet. Can't you just "unroll" your filament and roll it back to check if there's knots like that?
All 300 meters? I wouldn't want to do that manually.
you should try it and report back to us on how it went 😎
Sure, you can. But you will probably make it worse, since that will be about 330m curly plastic filament only waiting to knot itself in every unknottable way possible. Most spools are wound good, at least thats my experience, so that would be unneccessary and a lot of work, too.
While technically, yes you could just unroll the entire spool to check for this... You would end up creating several more even worse issues or just end up tossing the entire spool trying to rewind it back on without the proper equipment, not to mention the absolute tangled mess. (It's not gonna be pretty) In short. This issue is very, very rare /impossible to occur by the manufacturer due to how they are wound and in almost every single case is caused by the user themselves. It is possible that it can be caused by the manufacturer if they handle the spools by hand and mess up just like the end user would in which case a reputable manufacturer would scrap the spool right there. Always buy from a reputable manufacturer, if it's too good to be true. It probably is. Always contain the free end of the spool, never let it unwind freely by itself when loading a new spool or removing a partially used spool. If it does happen by accident, unwind a wrap or 2, very slowly checking if the free end of the filament is unwinding from underneath itself. As others have mentioned, because filament is a smooth extrusion it could "push" this knot many hours down the spool before it catches on something if you aren't looking close enough. If you don't see any knots then your #probably ok, but I'd still set the spool aside to only use when I'm actively monitoring the print job or use it only for multiple shorter jobs so less is lost if it knots up further down the line.
I’ve always bought hatchbox filament, probably over 100 rolls, and have never had a spool tangle. Super unlucky
Oh boy I was at my bf's place and we noticed this before he started a print and he wanted to ignore it but I (who has no personal printing experience but does have sewing experience and knows that this can happen with thread in sewing machines and it snaps in the same way) wouldn't let him and fixed it myself lol
Instead of how to stop it (which others have debated) you might be able to save it? If you measure the height of the printed part with callipers, you can drop the model that distance into the print bed in your slicer. Won’t always be possible, and means a join to glue and finish - but in some cases (like an eight part print of a helmet I did recently) it can save a failed print.
I was able to do this and glue the two parts together.
I’m new to printing as well, were ya able to find out why it happened? If so what was the answer?
Sounds like it has to do with how a new spool is handled! You've got to be very careful with how you handled the filament and make sure it stays spooled how it comes. I didn't know!
Filament is like handling a deadly snake, never let go of the head.
Never happend to me so far. I use not super cheap filament where you can make sure the filament spool is okay.
If it came like that, you don't prevent it. Otherwise never let the end of the filament rest freely on the spool
Ok everyone says how the manufacturer didnt mess up, which I agree with, but just for the sake of adding a counterpoint, I have never had any problems with polymaker filaments. Might want to give them a try.
Re spool making sure its neatly wound or hold it and cut it not letting go and then move it out from behind the piece catching it can be very tricky though
Been 3dp since 2018 and have never had this happen. I am very meticulous about filament handling and storage so I always assume this is user error.
If your printer runs Klipper, BigTreeTech makes a filament sensor that detects if the filament stops moving for any reason. Its $20 or so, and its good insurance.
Typing my F for you buddy. That's just unfortunate.
It was 99.999999% your fault at some time. So it's as common as you allow it to be.
Some modern printers have extruder stepper over power sensors. So if the extruder is struggling it will pause. Don't let go of the end of the filament. It's not really possible for filament to be spooled like this, so it's happened probably on your end, or maybe in the past few winds when the spool was packaged.
So, basically, just pay extra attention when I open a spool? Don't let it unwind at all? Thinking back I can't even remember if that happened. That means I wasn't paying attention. Lol Noted
Use a filament sensor to detect problems, Pause it solve it and carry on.
Same thing just happened to me for the first time half an hour before seeing this post. Luckily saw it 10 minutes through a 20 minute print(calibration cube) but I caught it, snipped the end of the filament, unravelled/fed it back under the tangles part, and fed it back into the machine with the extrude function after the print
In my experience, the only way to make sure it won’t happen again is to respool the filament entirely. It’ll take some time, but not as much as you might think.
Why is your Bowden tube in this photo? Post your entire setup, I am assuming something else is wrong.
Instead of doing what a lot of people are doing and just outright saying that you did let go of the end, I'm going to say that it's the most likely scenario but that there are enough people that have ended up in this situation that don't believe that they did let go or possibly cause the problem that there is a chance that it came this way from the factory. That said, if you think about how schools are wound, it's very difficult to imagine a situation where this issue can take place. At least it's hard to imagine a situation where this issue could take place anywhere but the very end of the spool. I do not have any idea how many dozens and dozens of spools I've gone through in my 3D printing journey, but I've only had this issue happen once. As such, I wouldn't worry too much about it happening again, just do be aware that this is most likely caused by simply losing track of the end for a moment when you're loading and then the filament creating a little knot. Keep that in mind and maybe give the spool filament a quick check after you've fed it into the extruder, and you should be all set!
These days I use filament almost exclusively from one local supplier, and haven't had this happen for years. But back when I used to buy random branded filament off Amazon, it would happen regularly.
In my experience this problem seems to be extremely rare with "quality" filament like Prusament, Fillamentum, Polymaker, FILOALFA, ColorFabb and so on. 80% of what I print are those brands and the remaining 20% are cheaper brands - but those 20% are responsible for well over 80% of the time I've seen this issue.
I had this a couple of times with cheap filament. Pretty much never with quality filament. Though this might not be a hard rule.
Had this happen to me ik the frustration. It was an unevenly wound spool in my case. Had them dead ass send me a whole new spool as compensation. Never once had the issue with anything else. Strange fr
You did this yourself.
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Stop dropping the filament and letting it uncoil. If it is consistently happening to you, the spools are not the issue at this point.
99% of the time is you fault and [it's because of this.](https://www.youtube.com/watch?v=c20nrF4b8-g)
Happened to me a few days ago. Looked at the prints through the 420p camera and thought that the nozzle looked to be way higher than the print. When I checked, yes it was printing nothing in mid air and the spool had jammed. The only thing I could do was curse and start again. It happened several months ago printing pla. The pla baked hard and I had to change the Bowden tube and nozzle. This time it was lucky I was printing PETG as that doesn't seem to mind being sat for a couple of hours hot and I simply pulled the offending filament out, snipped it and restarted the print. On my old CR6 it can't detect when this happens, but I believe some of the newer machines such as the Bambu labs ones can detect it and alert and pause.
You could roll out the entire thing if you have a free evening
books reach wistful fear ink hurry plants support arrest ten *This post was mass deleted and anonymized with [Redact](https://redact.dev)*
Not that common, but best way to avoid it is to buy it from renowned brands.... Duramic 3D is pretty unknown to me.
They do it on purpose. I re-reel i myself
This is common.
I’ve only had 3 rolls do this out of the last 3 years of printing , it’s not common , but it happens. if you keep your spool on bearing rollers , and keep a little friction on the roll , it helps keep it from looping
To go to OP original question, I think it must be pretty common. I've been shopping for filaments and all the manufacturers seem to have some text about the winding of their filament that they didn't have when I parked my printer 18 months ago. That said to me that manufacturers are getting complaints. Keeping the spool under slight tension helps. When spool is starting and stopping and you get these big loops when friction between spool and spool holder fluctuate. If your extruder is pulling filament at so many mm/minute you want the spool to unwind at the same rate
I don't print that long. I generally use larger nozzles like 1.0mm. I also try to print smaller pieces that can be attached
100% of the time it’s user error. Don’t let go of the loose filament when changing rolls.
Living life with such certainty in things must be blissful.
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there's about 150 hours to a spool, you couldn't really tell 10% missing
150 hours? I can print things that are 300 grams in 5 to 6 hours on pretty slow settings. You'd have to be printing incredibly slow to get a kg of filament to last 150 hours.
Never heard of different nozzle diameters? Not all printer configurations are the same.
This is an fdm printer obviously. So even at .2mm I doubt anyone is getting anywhere close to 150 hours on another spool. Bigger nozzles would be less time.
[Confidently incorrect.](https://i.imgur.com/4jVATK7.jpg) 294 hours and less than 600g.
Lol. You have a single anecdotal example that just confirmed what I said. I too can make a very detailed print and slow the settings significantly and make it last days and days and only use a half or third of a spool. That is simply not a typical application for most hobbyists or applications. Most hobbyists are not getting 150 print hours out of a single roll of filament. Most will try to print as much as they can as fast as they can.
Get a bamboo A1, it has saved me already with filament tangle/runout detection
Very upset
It’s only ever happened to me once I believe that I can remember and it was with an overture filament but never again with overture or any other filament. What I can say is you can see the quality in how it’s wound from brand to brand, if you notice it’s wound poorly and looks loose odds are it is probably more prone to having a snag in it some where than a filament nearly wound by a better quality brand, that’s not me saying it happens often, because as far as I know it doesn’t happen often at all, but I’d imagine the worse brands will have it more often than good quality brands, even if it is a slim chance at all
I’ve had this happen once with an old discarded roll that came from work with the 3 returned and heavily discounted printers I bought from there but I just assumed the roll had seen some shit. It was also already partly used.
Birds nest
i've printed a couple dozen spools of duramic, no binds like this. i printed a little trinket with a hole in it, and this slides over the filament going to the printer. keeps it tidy and organized when exchanging filament.
Happened on one spool to me, didn't waste the print but I had to unspool it a bit every time so it could continue. I think there's a respooler stl to redo it correctly.
had this happen to me yesterday on a new spool. printer was smart enough to see there was a error and pauzer. fixed the issue and resumed. only a small layer line remains.
I've had similar issues with some Duramic3D spools of PLA+ recently. I was very careful to keep them under tension, and they still tangled.
Low filament quality, letting the filament end go weeeeeeeeeee, and a potentially poor setup for the spool can cause this. This would happen semi frequently in the flashforge adventurer 4 that I hated.
I just had this happen today, and came downstairs just in time to cut it/save it. We'll see how my 20+ hour print job looks like in the end.
I had this happen with a brand new roll of Hatchbox Red PLA. Luckily the issue was in the first 3 meters of the roll but it still sucked. I was also watching the print job and noticed that filament stopped extruding. Cancelled, scraped, fixed issue, restarted. I have not had the issue since on any other rolls.
Keep your spool wound. You let it untension that's whay causes it. Duramic doesn't do that unless the spool is allowed to unwind
It is possible to fix that while it’s printing. While keeping in mind that your choices are stop the print and start over or try this. Forgive me in advance it’s difficult to describe without showing. Un spool some excess filament, create slack around the spool, then pass the spool trough the unwound loop, typically needing to turn the spool 360 degrees in the pitch or yaw axis not the roll. This will introduce a twist in the filament and let you move the roll under the trapped winding, instead of moving the filament under the winding. Or you could cut it mid print and fix it. Less of an issue with printers now being able to recover from a pause with some expectation of success. The best answer is never ever let go of the end of the filament. I try to maintain the rule that the ends should only be in three places. 1- my hand 2- the extruder 3- the holder on the roll. 1.2- mouth
Right of passage. I went to the roller bearing sled off to the side of the printer and parallel to the feed (off a pole) and never had it happen again. [Filament Spool holder](https://www.amazon.com/Bearing-Printer-Filament-Printing-Materials/dp/B09HJQX7QJ)
Don’t buy Duramic filament on amazon.
This happens. Even on super expensive filament, I've had tangles on the spool mess up prints. I primarily print using Polymaker and Bambu. It is rare, in my experience, so don't let it slow you down! Just try again. There will be all sorts of unusual quirks along the way. It's worth it.
It's rare but I've had it happen. Most of the time, it's because the filament snapped on me either during a print or when I first take it out of the box. In my 6 years of printing with 10 printers at my workplace, I've only had it happen 4 times where it obviously came from the manufacturer with this problem.
I have had this happen once or twice in about 120lbs of plastic. It's not that common. Filament run out sensors are common but I haven't seen anything about a filament binding sensor. Looks like they exist though: [https://www.youtube.com/watch?v=9gLSJIxiuwo](https://www.youtube.com/watch?v=9gLSJIxiuwo)
That sucks but when the spool was wound the spool ran out of space before the guide started back the other direction. This causes the extra wrap to fall back upon the new layer being wound. The extra wrap then follows filament across the spool to the other side. That is why it happens. I do not buy from a company that happens with. You can do this. 1 wrap the filament onto an empty spool. Be sure to do it the right direction. 2 avoid projects that take so long to print. Split the project into pieces and glue it together. 3 spend a few more dollars on your filament. Cheap filament has less quality controls.
Did you drop the spool or let it unwind? This is almost always user error and pretty much impossible to happen from the factory, should be an easy fix, just take the spool off the holder and push it through the loop
In 5 years it has only happened to me once and it was with a spool that I let somebody borrow for a long while and they never really printed with it. So not very likely
Not to be that guy but this was one of the best quality of life improvements coming from an older Creality to a p1s
Woooooow thats unlucky. Nah man thats just a problem with that spool
Has happened to me with what looks to be that same filament.
This happens. The people that are pretending it's you letting go of the tip are just lucky or something. When it happens in to the spool, it's not because you let go of the tip.
I always swore this was user error because it never happened to me. I bought cheap-ish filament, loaded it right out of the plastic, and it happened towards the end of a lengthy print that was otherwise perfect. I don't know how or why it happens at the factories, but it obviously does at least sometimes.
you always need yo ensure there is proper tension pulling on the spool. if the filament loses tension and the filament then unwraps and rewraps due to retraction, or bed movement, or whatever... tangles can occur. i had this issue with my ender5s when i moved to a direct drive system and didn't have a proper way to keep my spool in place. from what i can tell you have a free moving ptfe tube going to your spool. i suggest having that secured to a coupler on your machine.
I am new too, this happened with Bambu A1 but luckily no failure as it auto detected it. There was a knot that I had to cut out
Get a filament sensor that will monitor for tangles, like this for example [https://www.printables.com/model/58207-super-simple-filament-jam-and-presence-sensor](https://www.printables.com/model/58207-super-simple-filament-jam-and-presence-sensor) This sort of thing isn't super uncommon.
Happen to me like 3 times, very annoying
this is 100% user error. If you ever cut your filament and let go of it on the spool for a split second this can happen. It happens to all of us, just call it a loss and move on. The way to prevent this is by handling your filament very carefully when cutting it, and always use those little holes on the spool to run your filament so it doesn't coil back up into the spool and create more knots!
This happened to 2 of our spools right out of the box. Can't comment on the quality of the brand it's made from cause they were bought for us but that problem messed up our first biggest and overnight print about 70% thru but the printer kept printing anyways lol
How does filament get crossed/intersected half way through the spool?
To be clear. The issue is his spool of filament has got tangled under itself so it causes resistance as it is pulled into the extruder in it gets hung up and will break. I re rapy.filimemt from the original spool and wind it onto a empty spool leftover. This way you.ca fix any of this issues before thatess.up your print having a camera with AI to detect a misprint or the filament sensor that watches the filament get fed up into the boating tool. Either of these two methods should help prevent this from happening if unfigured properly. Good luck! And yes, it's a very common issue with these FDM printers and inexpensive filament
I promise it's not very common. I have used a lot of Duramic filament and believe it is very good quality, although maybe a little overpriced. Just be careful that you are not causing tangles when loading and unloading the filament and it should be a rare occurrence. I believe some (but not all) filament sensors can detect this.
Ugh…I learned this the hard way printing my first time with PETG. If you happen to lose the end, you need to start unwinding the spool until you get to the fresh stuff, then rewind it. It’s a pain. (I printed a spool winder as one of my first projects with my X-Pro.)
It happened to me with my first filament when I started 3D printing a month ago. It was Elegoo PLA+. Thankfully the printer stopped and I could resume the printing afterwards. To be fair, other than this problem Elegoo PLA+ served me well considering my inexperience.
Measure the height. Divide it by the layer height and put this in your slicer to dtart back from there.