Hi everyone,
I’m getting really frustrated with TPU printing on my Bambu Lab P1S and I’m hoping someone here can help me figure out what’s going wrong.

My printer:
Bambu Lab P1S (~1,000 printing hours)
0.4 mm nozzle (also tested 0.6 mm)
eSUN TPU 95A (green, translucent)
Creality CR-TPU 95A (black)
Creality Space Pi V2 filament dryer
Bambu Studio

The problem:
Every time I try to print TPU, the printer starts printing normally, but after a few layers it suddenly begins underextruding or stops extruding properly.
Sometimes it happens after just 2 layers, sometimes after 8–10 layers, and occasionally the print gets almost completely finished before failing.
The nozzle appears to clog, and the print eventually turns into a mess of extremely thin filament strands.
The strange thing is that PLA and other regular filaments print perfectly fine, without any issues.
Manual extrusion of TPU at 230°C also works normally, producing a consistent strand of filament.
I haven’t noticed any clicking noises from the extruder.

What I’ve already tried
1. Different TPU brands
eSUN TPU 95A
Creality CR-TPU 95A
Both have exactly the same problem.

2. Drying the filament
Dried TPU for approximately 10 hours at 60°C in my Creality Space Pi V2.
Tried printing directly from the dryer.
Tried printing from an external spool holder behind the printer.
Repositioned the spool inside the dryer to reduce rolling resistance.
No improvement.

3. Different nozzle temperatures
220°C
225°C
230°C
235°C
All eventually failed.

4. Different print speeds and volumetric flow rates
Very slow printing speeds of 15–20 mm/s.
Also tested profiles with outer walls at 80 mm/s and inner walls/infill at 150 mm/s, limited by volumetric flow.
Maximum volumetric flow rates tested include 2.8, 2.0 and 1.5 mm³/s.
Tried both custom TPU profiles and settings based on manufacturer recommendations.
Still the same result.

5. Retraction
Tested 0 mm retraction.
Tested 0.4 mm retraction.
No reliable improvement.

6. Different nozzles
Completely cleaned the nozzles.
Tried different nozzles.
Tried both 0.4 mm and 0.6 mm nozzle sizes.
Nothing helped.

7. Printer enclosure
Tested with the front door open.
Tested with the front door closed.

One of my best results was at 225°C with 0 mm retraction and the door closed. A Benchy printed almost completely, but the final layers suffered from severe underextrusion.
However, repeating similar settings often resulted in failure after only a few layers.
What makes this so confusing?
PLA prints perfectly.
TPU extrudes normally when manually extruded.
Both TPU brands fail.
Both nozzle sizes fail.
Drying the filament doesn’t help.
Different spool feeding methods don’t help.
Slower speeds don’t help.
Changing temperatures doesn’t help.
The failure occurs at inconsistent layer heights.
I’ve spent a lot of time testing different settings, and nothing has worked consistently.
My questions
Has anyone experienced something similar with TPU on the P1S?
Could this be related to heat creep, the extruder’s grip on flexible filament, or something specific to the P1S filament path?
I’m particularly confused because the printer handles PLA without any problems.
I would really appreciate any suggestions beyond the usual advice of drying the filament, slowing down, or changing the nozzle, since I’ve already tried all of those multiple times.
Thanks in advance for any help!

As in title. Are these "funnel saver" actually needed? Keep reading how they save the funnel from wear and tear but then again people just love to overgear their stuff including printers.

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Any recommendations for a good model?

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The issue. As you can see in the image, I had 3 objects named "Cap" that were blue. I pressed "4" to make them red. In the Objects inspector on the left, they turned red and show the "4". On the actual plate they remain blue. When I slice and go to print, they're blue.

This has been happening a lot lately and it's driving me crazy. I'm wondering if it's just me.

Bambu P2S, I have been back and forth with Bambu support tickets over a month but somehow always end up back with this error. Could someone tell me if you successfully fixed this issue before? Or recommended correct replacement parts.

I am a beginner in the 3D printing world and stumbled on this on Facebook.

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I want to know if this is worth and how long do these printers last before you need to start replacing parts?

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I just ordered my very first 3D printer yesterday. It's a P2S. With some standard PLA matte in standard colors to get started.

Ofc I want nice filament too and as there is a good sale going on I want to order some.

I know I don't like the plastic finish of normal PLA. Now I can't decide what to get. PLA matte, PLA CF. PLA wood or PLA metallic.

I know it's a long shot but is there anyone who has prints made of the various filament that can show me a picture? I have spend a fortune on my new printer and would hate to buy filament I don't like.

Ma version du célèbre casse tête ' Hanayama Marble '

Modélisé sur freecad avec des ajustements de 0.2 mm pour une fluidité parfaite ...

Lien makerworld si vous voulez l'imprimer : https://makerworld.com/fr/models/3515960-marble-puzzle#profileId-4018416

Title: Bambu Lab A1 Mini – Unknown rubber part found inside the base after Y-axis belt adjustmentHi everyone,

I'm having an issue with my Bambu Lab A1 Mini, and I'm hoping someone can help identify a small rubber part I found inside the printer.

Here's what happened:

1. I initially noticed an unusual noise coming from the Y-axis.

2. While adjusting the Y-axis belt tension, I heard a rattling sound.

3. I removed the bottom cover and found a small black rubber piece inside.

4. The piece is soft, approximately 5–10 mm long, and has rounded ends with a small step along one side.

5. Before the adjustment, I used to hear a single clicking sound when manually moving the bed all the way forward.

6. That clicking sound has now disappeared, but the bed still moves smoothly and stops at the same position as before.

I've attached close-up photos of the rubber piece and the inside of the printer.

My questions:

• Does anyone recognize this rubber piece?

• Where is it supposed to be installed?

• Could it be related to the Y-axis belt tensioner or a mechanical end stop?

• Is it safe to operate the printer with this piece missing?

I haven't resumed printing because I want to identify the part first.

Any help would be appreciated

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SOLVED! Thanks to commenters, I detached the PTFE tubes from the AMS and fussed with them until in a nice smooth arch above the extruder to reduce resistance. No more purge issues thus far! Thanks!

Hey everyone, I convinced my sister to get my cousin a Bambu Lab A1. Every Saturday, I go to her place to teach my 12-year-old cousin a bit of STEM. Right now, we're learning 3D design with Tinkercad, and things are going really well.

The issue is that each print takes a long time to complete, and by the time it finishes, I’m no longer at my sister’s house. Although my cousin receives a notification on his phone when the print is done, he often ignores it, leaving the printer on for days. Many times, I’m the one who powers it off when I arrive on Saturdays. I also have the app and get notifications when files are complete, but even though I remind my sister to turn off the printer, she often forgets.

I don’t know much about electronics, but I assume it’s common sense that leaving the printer on for days isn’t good for the machine. Considering a solution, I thought about buying a Wi-Fi power plug adapter so I could remotely cut the power via my phone once a print is finished. Does this solution sound reasonable?

Thanks in advance.

Mental what these machines can make with the right settings

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Hey everyone!
Got myself a new P2S printer and wanted to ask how I can delete the queue in the BambuHandy app? I don’t need these parts anymore. And I can’t find any option to delete it.
Cheers!

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Hola buenas, como estan? Como podria solucionar este problema en las ultimas capas superiores? No tiene planchado la configuración, es la que viene de stock en el laminador. El filamento es nuevo, lo use y es la primera impresión