Calibrating TPU Pressure Advance/Flow Dynamics no effect

Bambu Lab P1 Series
1

I am trying to calibrate Pressure Advance/Flow Dynamics for Generic TPU. There is absolute 0 effect. It just looks like the Pressure Advance/K Value isnt changed at all through the calibrating process. I tried Bambu Studio and Orca slicer. Tried Line, Pattern and PA Tower. I googled a lot and i am not the only Person. On youtube Peoples having the same Result. In this Forum i also found people with this Problem but i couldnt find a reason or a solution for this. Any help for me?

On my other Printers i dont have this Problem btw

2

What values are you using for the calibration?

3

I tried 0 to 0.3. Tried to go higher cause i realy wanted to see any difference but it 0.3 is the maximum allowed

4

Hmm, that should have shown some differences, are you on the latest version of Orca? They just released a bugfix for the PA tests

5

Yes I am on 1.9.1. Also i have this problem only with TPU. The Calibration worked fine on PLA/PETG

6

I had the same issue with Bambu TPU95A and I had to extend the range a lot before I saw a difference but I eventually did. Not sure what 0.3 limit you are referring to but Orca lets me go as high as I want.

My PA for the now discontinued Bambu TPU95A is 0.5 and it prints well.

For example, Orca lets me set a range of 0 to 1 without restrictions:

Screenshot 2024-02-19 094610
Screenshot 2024-02-19 094610832×904 117 KB

7

Try 4.0 ~5.0. it really needs alot, tpu has very little viscosity when liquid

1 Like
8

hi [MeicalnissyenMeicalnissyen)did you realy mean 4.0 to 5.0 or just 0,4-0,5?