Hi,
I have to apologize for my limited English.
I launched on July 4th a printing for about 7 hours, using a specific kind of filament (FormFutura Styx-12).
When I came later to see how things were, I found a complete mess (3 first pictures joined).
the piece currently partly printed was stuck to the hot end,
the hot-end and the whole extruder block were entangled in a big mass of melted filament,
the printer stopped displaying an error message HMS_0300-1E00-0001-0007,
the printer never detected a problem during the printing,
the error detected (left heat sensor disconnected) is a consequence of the problem, not the cause.
I’m deeply surprised to see that the AI detection of printing problems failed during hours, leading to the enormous blob of filament I discovered. This AI detection is described as a major breakthrough that improves dramatically the process of printing, while it failed on a rather trivial configuration.
I used during 7 years a very reliable and robust Makergear M3-ID printer, less sophisticated, which owns two independant extruders. It was slower, but never leads to the same problem.
Moreover, I’m stucked with this problem since July 4th.
The support team suggests that I remove the blob of filament using their usual techniques:
by heating up the hot end (I can’t do it for the left one)
or using a hair dryer (the temperature I reached was around 80°C)
I just succeeded in removing the part located at the right by heating the right extruder, but damaged the small filament cutting device (last picture joined)
I asked several times to change the whole extrusion block under warranty, but the support doesn’t agree
To conclude, I own an expensive, disfunctional 3D printer, with a support team that tries to avoid recognizing the problem.
Could you suggest a way to resolve my problem ?
Thanks
The support suggestion is spot on… you need to heat up that blob and carefully pull at it or use flush cutters to dig into it. The problem is its nylon and will require much higher temp than 80c that the hair dryer can do. You need to heat it up without melting the other parts of the tool head, which will be a tightrope walk. Maybe something like a soldering iron or a heat gun with smallest nozzle might work.
Also as a side note that filament is Nylon (PA12) without fiber additives. Nylons without a fiber filler (GF/CF) are notoriously hard to print, and likely that was part of the reason the blob happened in the first place. If you will try to print that filament again I strongly suggest using nano polymer adhesive on the plate to prevent it coming off. The issue was caused due to the print warping and letting go of the plate and getting stuck to the nozzle. I personally stay away from fiber-less nylons.
I’m not sure why you believe this is a warranty case.
Yes, it’s definitely a frustrating situation—but it was user-initiated and not caused by a fault in the machine.
When printing with materials like that, it’s a good idea to use a glue or adhesive that’s compatible with the specific material to help prevent issues like this.
AI detection is not guaranteed, much like most things involving AI, there will never be accountability for it’s behavior lol (businesses love this one wacky trick!)
If you can’t heat the nozzle, you’ll have quite the tough time resolving it. If you have a soldering iron that can go low temp, you might be able to rig something up to help.
IIRC that small thing you damaged isn’t the cutter, but the nozzle cap, and other people have mentioned that their H2D box shipped with extras.
L0rdS474n: If I understand correctly, every situation initiated by the user is out of warranty? It’s a strange definition of a warranty, isn’t it?
Bullocks:I can understand that AI detection is not guaranteed. But this case was rather easy to detect: the piece printed was stuck to the hot end, and visible by the camera. The blob is so big that it is also easily visible. If the AI is unable to detect that, it must be described as experimental.
Regards
maximit: You are probably right regarding the way to remove the blob. But when I ask the support for help, I naively wait a bit more than what I could find in the wiki. For example, dismantling the extruder block to avoid heating anything else than the blob of filament.
Makergear, the manufacturer of my previous printer, helps me a lot when I encounter problems. Once, they connected remotely to my printer to make a good diagnosis. That’s real support!
It’s a bit surprising, as my AI has consistently detected issues without any problems — perhaps your sensitivity settings are a bit low?
That said, issues caused by user setup typically aren’t covered by warranty. I mean, it’s similar to crashing a car and expecting a new one under warranty — it usually doesn’t work that way.
No offence intended, but sometimes it feels like there’s a tendency to shift blame rather than reviewing what might have gone wrong during setup or usage.
For what it’s worth, I’ve even introduced deliberate errors just to see if the AI would catch them, and it did — the only time it failed was when my dual filament guide malfunctioned and the filament spilled around the nozzle.
If you’re aiming to pursue a warranty claim, you may need to present a solid explanation for why glue wasn’t used, or why the printer wasn’t monitored during the first prints with that configuration. You could also look into your local consumer protection laws — they might offer some support depending on your jurisdiction.
L0rdS474n: I don’t intend to offense anyone too. But comparing the fact of crashing a car with just launching a print with a filament that is difficult to use seems rather harsh. I haven’t made any mistakes. I just rely on the AI detection to stop the printing if something fails. That is the claim of Bambu, I think.
Regards
I just went through some Bambu Lab documentation, and they clearly state that the AI is not foolproof. They also mention that they “accept no liability for damage or injury… incurred directly or indirectly from the use of the product.”
So your warranty case might be difficult to win — but not necessarily impossible.
Except for the glue (I never had to do it during my whole practice of 3D printing (more than 10 years)) I can answer YES to the other questions, and I provided all the logs they asked for.
An example of what I consider a bug: I asked to be warned of any answer to this thread. I didn’t receive any. It’s a small thing, but it shows a bad way of designing.
In the same spirit, the hot end of my previous printer was built around a compact and strong block of aluminium: a lot of other manufacturers do like that. The heating part and the temperature sensor were inserted into it. It was simple and robust. The way it is designed by bambu is clearly more fragile. This leads to the loss of the temperature sensor in my case and my current problem.
Have you been using the Bambu Lab Textured PEI Plate for a long time as well? If not, that could be part of the issue.
It’s always a good idea not to assume that what worked with other machines or tools will work the same way with a new setup — at least not before monitoring it closely and building some trust in how it behaves. Skipping that step can easily lead to problems sooner or later.
No, I succeeded in cleaning the right hotend, but the left hotend is always mainly covered by melted filament. Once more, the support doesn’t answer when I ask for removing the extruder block. I know that I can find a tutorial on the wiki. But that’s not support.
And I own the H2D for less than a month. I don’t think that it is a long time.
With over 10 years of 3D printing experience, I’d say you definitely don’t need Bambu Lab to hold your hand when it comes to maintenance. Waiting for their guidance will only slow down your workflow unnecessarily — especially since their first-line support tends to be painfully slow to respond.
You’re right. But I think that Bambu will refuse to take under warranty anything that I can break if I don’t have their agreement. You will probably answer that they will not agree to pay for anything. But I want such an official answer from them. And I will post the whole story on as many forums as I can if it occurs. That’s the way a small customer can fight against an unfair manufacturer.
Their fault is in this advertising:
“The H2D features an AI-backed nozzle camera with macro lens. This intelligent monitoring system continuously tracks extrusion patterns, immediately detecting material accumulation, filament deviations, and extrusion failures.”
There isn’t any place for not detecting a printing problem during hours in these sentences.
It’s simple.
Thanks.
I think that I give up with Bambu. I asked them to be refunded for the additional stuff I ordered after the H2D. All this stuff is useless as long as the H2D is out of service.
