TPU BAMBULAB overhang issues

Bambu Lab X Series Bambu Lab X1C
1

BAMBULAB X1C
TPU white from BAMBULAB
All configurations default from Bambu Studio
I try tu put support tree but it was impossible to remove supports easily see pictures !

This is my first print with TPU
Some one could help me ?

Capture d'Ă©cran 2025-10-03 113540
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2

First, did you dry it as recommended by Bambu? Which TPU are you using? TPU does not print like PLA when it comes to overhangs.

3

This the TPU received from Bambu
TPU for AMS × 1
Blanc (53100) / Filament avec bobine / 1 kg
I have no more information.
I just let BambuStudio determine configuration parameters for TPU when I start using TPU.
Do you have some advice to help me ?

4

Bambu recommends you dry TPU for AMS for 8 hours at 70c (in a blast oven) or 12 hours at 80c to 90c using the printers drying function.

Here more drying info:
https://wiki.bambulab.com/en/filament-acc/filament/dry-filament

Here’s the guide to printing TPU:

5

Besides drying it throughly you also need to calibrate the flow ratio and maybe PA/K if needed. Wrong flow ratio will make overhangs even more worse than they actually are when they are good :wink:

6

I think this is regular TPU 95A, although the logic is the same. Drying is a must if wet filament is something you have experienced before.

I am lucky enough not to have dried filament, I a, nit the norm (in anything).

I think the problem is a combination of the fact TPU is sticky as it fuses, causing issues with supports fusing with model.

You could increase the retraction length and try again, but the unsupported curves in the model are tough.

  • Use the ‘menu’ button next to the filament in the prepare tab (
)
  • Locate retraction and increase the value a bit at a time during several tests to find the balance you seek in the printed model.

Using a lighter to melt away wisps is a common solution. Short (one second) usage at a time or it will burn. You need to get much less material as the current results are hardly wisps.

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7

Thank you for your advices I will try step by step !
and comment my future tests
 :grimacing:

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8

The “e” in this model is going to look like a horror show in TPU. Not enough room to place a support finger and it’s completely overhung. I’d suggest maybe using PLA as your support material (doesn’t stick a lot), give it 0 distances, and hope for the best

9

The TPU will be externally mounted on the X series, not possible to use another filament as a support material, at least not currently.

10

OK thank’s but for this project I need good flexibility

11

53100 is white TPU for AMS, so he could use PLA for support, as suggested.

12

I read this in the original post.

I didn’t spot this change further down.

So I now feel dumb for telling @PrinterMcgee the wrong thing.

And compounded it later with this.

That is two posts my dying eyes betrayed me on yesterday.

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13

It happens to the best. I hope to learn as much as you have forgotten.

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