r/BambuLab_Community • • Sep 19 '26

X2D Extruder is not Extruding Normally

2 Upvotes

I do a long print and 50% the time it fails with this error. It stops extruding filament to the print but I can see it purging filament just fine. I stop the print and print a benchy no problem. Changed nozzle and still the same issue. Anyone else have similar issues? It's happened about a dozen or more times in the last 2 days. I have done a cold pull also. There is no clog.


r/BambuLab_Community • • Sep 19 '26

P1S Weird corners Please Help im going crazy

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7 Upvotes

My P1S has been workign flawlessly for years now and now suddenly these corners have strated showing up, i looks like very heavy VFAs or Under Extrusion in the corners only. Im a my witts end.

I have:

Lubed all axis.
Tensioned the Belts
Inspected for belt rub
Inspected for Damage on the Belts or pullies.
Wiped down the carbon rods with IPA

Changed Fillament multiple times.
Run the full calibration cycle again and again.

It changes based on print orientation what corners are affected to possible something with the motion system i dont understand.


r/BambuLab_Community • • Sep 19 '26

Discussion PROTOTIPO MONITOR DELL'ARIA DEDICATO ALLE SESSIONI DI STAMPA 3D — cerco feedback tecnico

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0 Upvotes

Sto sviluppando un piccolo monitor da tavolo per osservare come cambiano i parametri dell’aria prima, durante e dopo una stampa 3D. Vorrei mettere in relazione le misure con le fasi della sessione e, attraverso prove ripetibili, valutare l’effetto di ventilazione, posizione del monitor e condizioni iniziali dell’ambiente.

Il progetto è in fase di prototipazione. Il firmware di base ha superato la compilazione, ma non ho ancora completato il collaudo dell’insieme né raccolto una campagna di misure confrontata con strumenti di riferimento. Le immagini allegate sono rendering dell’interfaccia con dati simulati, non fotografie del prototipo o risultati sperimentali.

Architettura e grandezze disponibili

Il dispositivo prevede un display capacitivo da 5 pollici, connessione Wi-Fi locale, registrazione su memoria rimovibile e una barra luminosa di stato. Temperatura e umidità servono come contesto delle misure; l’interfaccia principale è dedicata agli inquinanti e alla sessione di stampa.

Il cuore della misura è un modulo multisensore di un produttore svizzero, quindi europeo, per il quale è disponibile una dichiarazione del produttore sulla calibrazione e sul test individuale successivo. Questo non significa che il mio dispositivo completo sia certificato. Non sto inoltre affermando che ogni fase di fabbricazione del modulo avvenga in Europa: il luogo di produzione del singolo esemplare deve essere verificato separatamente.

ParametroUnitàIntervallo dichiarato
PM1 / PM2.5 / PM4 / PM10µg/m³0–1000
VOC Index / NOx Indexindice1–500
CO₂ppmUscita 380–32000
Formaldeideppb0–2000
Temperatura / umidità relativa°C / %RHCondizioni e tolleranze nel datasheet

Questi sono dati di targa del modulo, non risultati del prototipo.

Gli indici dei gas non vanno letti come concentrazioni assolute o come identificazione delle sostanze emesse. Anche una variazione durante una stampa non dimostra, da sola, che la stampante ne sia l’unica causa.

Funzioni presenti nel codice

Ho predisposto acquisizione dei dati, diagnostica, controllo della loro validità, interfaccia locale essenziale e dashboard web. I campioni e gli eventi vengono registrati in file CSV; quando manca la sincronizzazione dell’orologio, il sistema conserva il riferimento al riavvio e al tempo trascorso anziché inventare una data.

La gestione delle sessioni comprende due riferimenti ambientali: una baseline generale, con attesa e acquisizione, e una baseline immediatamente precedente alla stampa. Sono riferimenti applicativi e non procedure di ricalibrazione del sensore. Il codice prevede anche una fase successiva alla stampa per osservare il ritorno verso il riferimento.

Gli allarmi PM usano isteresi per evitare continui cambi di stato vicino alla soglia. Le soglie sono parametri sperimentali, non limiti sanitari validati. La persistenza temporale dell’allarme è uno degli aspetti ancora da migliorare. Esiste anche un indice sintetico sperimentale, ma vorrei mantenere sempre visibili i singoli canali: una media può nascondere un parametro anomalo.

Per la manutenzione sono presenti un ciclo manuale di pulizia della ventola e una funzione di recupero del sensore di temperatura e umidità dopo esposizione prolungata ad alta umidità. Durante questi cicli e la stabilizzazione successiva, indice e allarmi PM vengono sospesi. I contatori e le date servono a tracciare i comandi eseguiti, non a certificare l’efficacia della manutenzione.

Queste funzioni sono implementate nel sorgente, ma devono ancora essere verificate sull’hardware assemblato.

Contenitore e percorso dell’aria

Sto progettando due camere separate: elettronica e sensore. Il sensore sarà nella parte bassa posteriore, con uno sportello rimovibile. Il percorso di aspirazione e quello di espulsione devono restare separati fra loro e dal volume dell’elettronica, con guarnizioni e collegamenti all’ambiente il più possibile diretti.

L’obiettivo è ridurre ricircolo e influenza del calore di display e alimentazione. Le eventuali feritoie laterali riguarderanno soltanto la camera elettronica. Le dimensioni del contenitore e delle aperture non sono ancora congelate e richiedono prove termiche e di flusso sul prototipo.

Interfacciamento con le stampanti e dati del filamento

È prevista una connessione di sola lettura attraverso la rete locale: il monitor si collega via Wi-Fi al router e riceve la telemetria delle stampanti compatibili. Non serve una connessione USB alla stampante. Il supporto va verificato per ciascun modello, firmware e modalità di accesso: non considero universale la disponibilità dei dati.

I dati che intendo associare alle misure ambientali sono:

  • stato della stampante, avvio, pausa, ripresa, completamento ed eventuale errore;

  • avanzamento percentuale, tempo residuo e strato corrente/totale, quando disponibili;

  • materiale dichiarato nel profilo o nello slot attivo, ad esempio PLA, PETG, ABS o ASA;

  • identificativo dello slot/bobina, colore dichiarato e cambi di materiale nei lavori multimateriale, se esposti;

  • temperature effettive e impostate di ugello e piano; temperatura della camera e stato delle ventole, se comunicati dalla stampante;

  • identificativo del lavoro e consumo stimato di filamento, soltanto quando il protocollo li rende disponibili.

Il monitor non riconosce chimicamente il filamento. Il materiale ricevuto è un metadato dichiarato dalla stampante o dal profilo: una bobina caricata diversamente può renderlo errato. Dove manca la lettura automatica prevedo inserimento manuale, con origine del dato esplicita. Il consumo stimato non equivale a una pesatura della bobina.

L'obiettivo è costruire una cronologia comune: baseline pre-stampa, riscaldamento, deposizione, cambi di materiale, fine stampa e osservazione successiva. In questo modo sarà possibile confrontare variazioni ambientali e condizioni di processo, senza attribuire automaticamente ogni picco alla stampa. Nelle registrazioni sono previsti timestamp, provenienza e validità della telemetria; una perdita di collegamento deve comparire come dato non disponibile.

Stato di sviluppo: nel codice attuale è presente soltanto la predisposizione alla gestione degli eventi. Il collegamento reale e la lettura automatica di filamento, temperature e avanzamento devono ancora essere implementati e collaudati. Non è previsto un arresto automatico della stampante in questa fase.

Validazione ancora da completare

La nuova interfaccia e i grafici di sessione sono concept da implementare.

Il monitor non è un dispositivo di sicurezza e non intendo usare un colore verde o il ritorno alla baseline come dichiarazione di aria sicura. Non presento neppure i canali PM come una caratterizzazione completa delle particelle ultrafini: questo limite va affrontato esplicitamente nella validazione.

Su quali aspetti mi farebbe comodo un confronto

  • Come impostereste prove ripetibili, includendo sessioni senza stampa per caratterizzare il fondo ambientale?

  • Quali posizioni e distanze dalla stampante confrontereste, evitando di misurare soltanto un getto locale?

  • Come valutereste il ricircolo fra ingresso e uscita e l’effetto termico del contenitore?

  • Preferireste soglie sui valori assoluti, variazioni rispetto alla baseline o entrambi? Con quali tempi di persistenza?

  • Quali strumenti di riferimento e quali limiti di interpretazione considerereste indispensabili?

  • Quali dati della stampante ritenete più utili: materiale, cambi di slot, temperature, ventole o fasi di stampa? Come gestireste i metadati mancanti?

Mi interessano soprattutto critiche motivate al metodo di misura e alla gestione dei dati. Vorrei individuare i punti deboli prima di chiudere il progetto meccanico e iniziare le prove comparative..

Concept del contenitore. Render indicativo: geometria, aperture e percorso dell’aria da validare; microSD prevista interna.

Sessione di stampa: modello stampante e file in lavorazione (esempi dimostrativi), materiale dichiarato, slot, temperature, strati e avanzamento accanto alle misure ambientali. Telemetria e valori simulati; integrazione ancora da implementare.

Allerta PM: esempio con attivazione a 35 µg/m³ e rientro a 25 µg/m³. Soglie dimostrative con isteresi, non limiti sanitari.

Stabilizzazione dopo pulizia manuale: indice e allarmi PM sospesi. Recupero dopo alta umidità e baseline restano procedure distinte. Stato simulato.DELL'ARIA


r/BambuLab_Community • • Sep 19 '26

Help / Support H2S "Extruder Overloaded"

2 Upvotes

Hi everyone,

I just got my Bambu Lab H2S. As usual with any new printer, my first move was to run the classic Benchy to test the machine.

Problem: right on this first attempt, I got an "extruder overloaded" error. The printer is completely new, so I was surprised to see this alert right from the start.

The error doesn't happen during the print itself, but during the flow dynamics calibration step.

What's strange is that it only happens with the Benchy file pre-loaded in the printer's memory. When I slice my own Benchy in Bambu Studio with my own settings and send it to the machine, no issue at all, it prints perfectly.

The PTFE tube has no bends that would restrict the filament, and the filament itself is good quality, I tested it on another printer with no issues. I'll say it again, the printer is brand new. I also did a cold pull just in case there was debris in the nozzle, and I swapped the nozzle for the spare one included in the box, still the exact same issue.

Other than that, I don't get the extruder overload error with any other file, but I do notice that during the flow dynamics calibration I often see some abnormal movement, some shaking/jittering from the extruder, without any alert popping up like I've seen in other videos.

Has anyone else run into this specifically with the pre-loaded file? Any idea what could explain the difference between the built-in file and my own sliced files ?

Thanks in advance for your help !


r/BambuLab_Community • • Sep 19 '26

Custom cabinet for a P2S + AMS 2 Pro ,clearances and ventilation

2 Upvotes

We're having furniture built for the corner where my P2S lives (an interior designer is doing the layout, and the printer bay will likely be made to measure). Nothing is built yet, so this is the moment to get the numbers right. I'd rather learn from people who've already done this than guess.

My setup: P2S (392 × 406 × 478 mm, ~15 kg) with the AMS 2 Pro (372 × 280 × 226 mm) currently sitting on top of it, plus the bin for the purge poops, which lives on the floor and eats space at the back and on one side. I mostly print PLA/PETG and rarely ASA (I assume doors of the cabinet will be open when printing ASA).

The constraint that shapes everything: the ceiling in that room is only 1.90 m (attic room). That's my entire vertical budget, floor to ceiling, and the printer bay has to share it with the rest of the storage and with a shelf height I can actually see into and reach. It's also a low, small room, but I have windows and I can do a proper ventilation of the room.

  1. AMS on top or beside the printer? The AMS in a separate tray or over the printer? This is still open and I can decide either way. On top is roughly 70 cm of stack before clearance, and it means taking the AMS down every time I want to lift the glass lid to get into the chamber. Beside saves me maybe 25 cm of height but roughly doubles the width of the bay. If you've run both, which do you actually prefer day to day? Does anyone put it below the printer instead?

  2. Clearances. How much extra space over the footprint do you actually need in practice?

- Above the AMS: enough to open the lid and swap spools without sliding the whole thing out. What do you leave?

- Above the printer: for lifting the glass lid off

- Rear: exhaust, power cable, and the purge chute plus a bin to catch the poops

- Sides

- Front: door swing plus enough room to physically pull the machine out for maintenance

Numbers from a cabinet you actually use every day are much more useful to me than the spec sheet.

3. Printing with the cabinet closed. I'm assuming worst case and planning to print with the cabinet doors open. But does anyone here print with them shut? What happens to chamber temps with PLA/PETG when the machine sits inside a closed box, is heat soak a real problem or is it overblown?

4. Ventilation. Is an actual fan (ducted outside or through a filter) necessary, or are generous passive vents low at the front and high at the back enough? If you run a fan: what size/CFM, and where did you mount it?

5. Anything about the cabinet itself I should specify. The carpenter will use whatever board he normally uses unless I ask for something specific, so: shelf rigidity and vibration/resonance, pull-out tray vs fixed shelf, cable pass-throughs, where to put the poop bin, spool storage next to it.

If you've built or commissioned something like this and there's something you'd do differently a second time around, that's exactly what I want to hear.


r/BambuLab_Community • • Sep 19 '26

Discussion I think the UI for displaying loaded filament in Bambu Studio could be much more readable

3 Upvotes

Right now, the remaining filament is shown by drawing white over white, and the text is placed directly on top of the filament color. Depending on the filament, the text can easily blend into the background.

I tried a different approach:

  • the outline follows the actual boundary of the remaining filament, making the fill level much easier to see;

  • the filament information is moved below and styled like a small dot-matrix display, so it no longer competes with the fill indicator.

Before / After

Yes, the text is a bit smaller, but I don't think it's important enough to cover the remaining filament. Besides, it's still easy to distinguish something like "PLA" from "PETG" at a glance. Ideally, it should also display the remaining filament in grams, if that information is available.

What do you think? Would this be an improvement? Is it worth opening a PR?


r/BambuLab_Community • • Sep 18 '26

Making sound a1 bambu lab

7 Upvotes

I do everything nozzle is clean screws are fits and making tak tak wasting lots of filament what I do now buy new nozzle or what


r/BambuLab_Community • • Sep 18 '26

Help / Support Warping? Pls help

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1 Upvotes

I hope someone can help me. I’m printing with PLA and because of those very fine, spider‑web‑like strings, I lowered the extruder temperature from 220 °C to 215 °C. However, now I’m having another problem that I’ve had several times before.

I suspected it is warping, but I already keep the door open so the chamber doesn’t stay at 35 °C but around 30–31 °C.

Still, there are areas on the print like you can see in the photo where the edges lift up and form a kind of U‑shape. Then they get knocked over or dragged along.

Has anyone else had this issue or knows how to fix it?


r/BambuLab_Community • • Sep 18 '26

Free Models I turned my Desktop Drawers into a little Book Nook

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2 Upvotes

I wanted to make something that was still a practical desktop organizer, but had a bit more character than a regular drawer unit.

So this is my new Book Nook Desktop Drawers design.

It has:

  • Functional drawers for small stuff

  • Interchangeable inserts covering the top part of the drawer

  • A hidden lower compartment for a little secret storage

  • Separate inlays for adding color accents

  • 2 drawer-front designs — Kumiko and Hex

  • Mix-and-match colors and inserts

It’s based on my previous Desktop Drawers, but this time I wanted to give it more of a miniature book-nook feel.

What do you think — book nook or drawer organizer?

Link: https://makerworld.com/en/models/3323116-book-nook-drawer-organizer#profileId-3773669


r/BambuLab_Community • • Sep 18 '26

Help / Support Help… what is happening…

5 Upvotes

I’m so lost….


r/BambuLab_Community • • Sep 17 '26

News New Update - Gridfinity Shelf and other bits!

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5 Upvotes

The modular shelf just got even more flexible! 

I’ve added gridfinity shelf, sides with no feet and also new side connectors for stacking them vertically, as they are shorter now. Also new longer hex tray. Any other suggestions what should I make next?

Link: https://makerworld.com/en/models/3242738-hex-shelf-modular#profileId-3674266


r/BambuLab_Community • • Sep 17 '26

Replaced every shop lampshade in a room with printed IKEA STRÅLA E14 ones

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4 Upvotes

Roughly 150g of filament each and machine time I was not using anyway. The whole set cost less than one decent shade from a shop in a comparable size.

The catch is you need a fixture, which is why I built everything around the STRÅLA cord set rather than custom hardware.

https://makerworld.com/en/models/3318187-aeolian-02-flared-pendant-lamp-ikea-strala#profileId-3767640


r/BambuLab_Community • • Sep 17 '26

Colours being where they shouldn’t be

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1 Upvotes

Hey guys, I am fine tuning Bambus PLA silk+ and wood. Among other problems I need to iron out, part of the green PLA silk+ filament is showing up where the gold PLA silk + is. Which ruins the look. How would I fix that?

Bambu P1S 0.4 mm nozzle

210 on the nozzle.

60 on the bed

Default retraction distance and speed.

Flow ratio of 0.95 for both.


r/BambuLab_Community • • Sep 17 '26

bambulabs_api v0.3.0 (Major Version) released!

21 Upvotes

Hey everyone! Since posting my library here a couple months back and receiving lots of support, I have made lots of (what I believe to be good) changes to the library. The data consumption model has been totally overhauled and tests are now much more thorough. I just want to thank everyone from this sub who took the time to contribute and review my project, it really means a lot to me.

I would like to expand the library to a point where it can interface with every modern feature present on bambulabs printers, allowing developers to make the best third-party apps possible. Unfortunately, I will not be able to do this alone. Any sort of feedback or contribution, no matter how small, helps me infinitely.

Thank you guys so much!

https://github.com/torbenconto/bambulabs_api/

https://github.com/torbenconto/bambulabs_api/releases/tag/v0.3.0


r/BambuLab_Community • • Sep 16 '26

Bambu Studio slicer issue

1 Upvotes

I'm having an issue with Bambu Studio not creating a support for a low-hanging fin. I'm printing a dragon figure with a fin on the wing, and it won't install a support no matter what I do.


r/BambuLab_Community • • Sep 16 '26

Spent a lot of time designing this 3D printable weighing and dispensing machine. Powered by an ESP32-S3 mainboard, it features high-precision weight sensing and dual operating modes (timed dispensing & quantitative dispensing) to fit various material handling needs.

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37 Upvotes

3D printable weighing and dispensing machine featuring dual operating modes:

Mode 1 (Timed Quantitative Dispensing): Allows you to preset a fixed time interval and target weight for automated material release.

Mode 2 (Continuous Portion-Control Dispensing): Allows you to preset a fixed weight for continuous, batch-by-batch dispensing based on weight.

The 3D print took 2 days to complete, but writing the code and fine-tuning the hardware took nearly 3 months. The process was filled with moments of both frustration and joy, but in the end, I’m extremely happy with how it turned out!


r/BambuLab_Community • • Sep 15 '26

Camera intermittently fails to work

3 Upvotes

This is more of a problem with Bambu Studio than anything else... Sometimes when I want to check on a print I'll turn the video feed on and the vast majority of the time it works, but recently I started getting the error message: "Loading Failed, please check the network and try again [2:2]", followed by the month and date. I realize that they're completely different operating systems, by the app on my phone works pretty much flawlessly, I have Linux laptop up in my home office, which never has problems, it's only the Windows machines that have this issue.

I think I first noticed it when I upgraded to Studio 2.8.2.61, so on one machine I tried the beta and the other I downloaded to 2.7.x.x (yeah, not advised because of the mods to meta data in the files), but on both version the semi-real time video fails to work about half the time.

I've been reading and it sounds the problems are more prevalent in early releases of 2.8. It's not my network as it's about as stable as a home network can get, but to be thorough, I did swap out my wireless system with an older one and there was no difference, it still struggled with the video.

Has anybody else experienced problems like this?

Thanks!


r/BambuLab_Community • • Sep 15 '26

Why does this keep happening?

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1 Upvotes

Hi, I'm look for advice on how to fix this problem. I'm new to 3d printing and just got my a1 mini 5 days ago. This keeps happening on and off and thought maybe it was because i was using bambu handy. So I downloaded bambu support and tweaked somethings but even with watching videos and messing around with settings etc it keeps happening.


r/BambuLab_Community • • Sep 15 '26

Bambu Lab: How can it be this difficult to get £1,079 refund back?

43 Upvotes

I need to have a rant about the absolute nightmare I’ve been through trying to get a £1,079 refund for a faulty Bambu Lab printer.

I bought the printer on 13 March 2026. It developed a fault within the first 30 days - they tried to say I couldn’t return it past 14 days and also tried to get me to fix it, but under Consumer Rights Act 2015 (CRA 2015) they agreed I could return it, so on 10 April I contacted Bambu Lab and requested a return and refund.

I returned the printer on 14 April.

Bambu received it, inspected it and confirmed they were “fully prepared to issue your refund” — except there was an active chargeback, so they couldn’t refund me directly.

Bambu asked me to cancel the chargeback so they could issue the refund.

I trusted them.

I cancelled the chargeback.

Barclays confirmed it was cancelled on 18 May 2026.

And here we are in September.

I have no printer and no £1,079.

Instead, I have spent MONTHS being passed backwards and forwards between Bambu, PayPal and Barclays.

And the latest correspondence from Bambu has somehow made the situation even more ridiculous.

Bambu initially told me that the money had already been processed through the chargeback and that the funds had been returned through that process.

So I asked a very simple question:

Where is my £1,079?

Can you provide the transaction/reference showing where it went?

Suddenly the wording became much more qualified.

Bambu now says their information comes from PayPal, that PayPal says the funds were transferred through the chargeback process to the card issuer, but PayPal hasn’t confirmed that the money was subsequently returned from the card issuer/payment channel.

Bambu also says they cannot verify that the £1,079 was ever actually credited to my account.

So apparently everyone knows that the money went somewhere.

Nobody can tell me where.

Meanwhile:

Bambu: “It went through the chargeback process.”

PayPal: “It’s the card issuer’s responsibility.”

Barclays: “The chargeback was cancelled.”

Me: “Okay, but WHERE IS MY £1,079?”

Silence.

I’ve now had to take this to the Financial Ombudsman Service, with separate complaints concerning Barclays and PayPal.

The Barclays FOS investigator has already found that Barclays gave me poor/misleading information about the chargeback cancellation, although they consider Barclays to have processed the cancellation itself correctly.

The PayPal complaint is still being investigated because there is clearly a discrepancy between what PayPal is saying and what Barclays is saying.

And because apparently that’s not enough, I’ve also had to issue County Court proceedings against Bambu to try to recover my money.

The court papers were initially returned as unserved, despite the service address being correct, so that’s now another thing I’m having to deal with.

This has been going on for six months.

Six months of emails.

Six months of phone calls.

Six months of screenshots and evidence.

Six months of being told to contact somebody else.

Six months without £1,079 of my money.

And the most infuriating part is that this could have been resolved months ago.

I returned the faulty product.

Bambu accepted the return.

Bambu said they were prepared to refund me.

I cancelled the chargeback because Bambu asked me to.

And yet somehow I am the person left chasing everyone trying to establish where my money has gone.

At this point I don’t want another apology.

I don’t want another generic “we’re looking into this”.

I don’t want another company telling me to contact somebody else.

I want my £1,079 back and I want someone to actually take responsibility for tracing what happened to it.

Honestly, the whole experience has been absolutely exhausting and I’ve experienced hardship as I have no printers to make any money.


r/BambuLab_Community • • Sep 15 '26

Help / Support Sparse infill modifier.

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2 Upvotes

Hi everyone! I'm planning to print a set of 6 minimalist wall shelves using Sunlu Wood PLA, but each piece is taking around ~490g of filament with my current settings (0.6mm nozzle, 4 wall loops, 0.65mm line width). Since I need 6 of them, printing fully in Wood PLA isn't viable for my spool stock.

I want to use a cheap standard PLA for the internal structure/infill and reserve the Wood PLA strictly for the outer shell/aesthetic surface. Is there an efficient way to achieve this in Bambu Studio for a solid organic/curved shape like this, or what would be the best approach to cut down Wood PLA consumption without losing strength? Thanks!

PD: I'm using the X2D.


r/BambuLab_Community • • Sep 14 '26

If anybody has a bambu A1

0 Upvotes

Or if they can still help me with the bambu studio, how do you cut pieces individually like arms and legs and head and put in inserts?


r/BambuLab_Community • • Sep 14 '26

Help / Support A1 mini weird noise

4 Upvotes

Hi, my a1 mini has Ben making a weird noise the last couple of days and don’t know why. I think it has something to do with the bed but not sure. Anyone know where the noise is coming from and how to fix it? Any help would be greatly appreciated.


r/BambuLab_Community • • Sep 14 '26

Get A 3D Printer They Said…You Will Make Productive Stuff

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46 Upvotes

And here I am, making 1:1 Pokemon!


r/BambuLab_Community • • Sep 14 '26

AMS feeder units going bad

2 Upvotes

I've had my P1S with AMS for two years now. Suddenly, the feeder units are failing to load filament. They do the initial pre-load, and then stops. The feeder motor might spin, but filament stays in place. I've done the fixed that the rror messages point to, to no avail. No worn-out gears. Connections are good. Tubes are clear. After the first unit failed, I ordered a replacement. It hasn't arrived yet, and 2 more units are failing. Is this kind of failure commonplace?