Have you tried the Bambu Studio Preferences setting that allows you to ‘Skip AMS blacklist check’?
But you can’t load TPU into the AMS.
So you’re still forced to lie to it.
Unless I’m missing something.
I used it yesterday, with my “TPU-faked-as-PLA” filament profile, but I still have to worry that something will print from Makerworld with what the AMS considers to be PLA and will damage my machine.
When you say ‘You can’t load TPU into the AMS’, are you saying that it physically will not work, or that the software does not work the way you want it to?
My thought was that if you used the 'Skip AMS blacklist, that you could then software-wise accomplish your need.
Sure, but then we are talking about what flavor of unreasonable work-around.
The issue with lying to the machine - I load in TPU. I say it’s PLA.
I print a speedboat, the AMS uses the “PLA” and tries to ram 4 pounds a minute of TPU through the system and jams everything up.
If it KNEW it was TPU, it could handle it with kid gloves. Basically, “ignore blacklist” should be a function on the AMS, not a function of the slicer.
There is no AMS software. There is Bambu Studio software. If you use the ‘Skip AMS blacklist check’, can you then use the TPU as you would like without lying to the machine?
If not, what errror do you get and when do you get it?
If you know that something works but don’t allow it straight and only through tricks, no words are needed.
It’s may like by the Prusa mini, which was magically able to print faster overnight with a magical update (just after the A1 went on sale - what a funny coincidence). There are just things that you don’t forget because it shows the rooted structure of actions. The underlying company philosophy and what to expect in the future. Ok, after a companies takeovers, opponents who put pressure on, unexpected outbreaks can come in an unexpected direction.
Communist states can have very strange peculiarities when it comes to leadership and to follow the rules of the boss. Even stranger than in countries where someone has their finger on a line of text and says: That’s what it’s written here… i.e. people who can read but cannot think also say nothing, were raised to remain silent to survive in a slow dying structure 
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Please try to select “TPU” of ANY sort on the X1’s screen, telling it you just loaded that into the AMS.
I always get an error and it won’t allow this.
I don’t see why we need to drag politics into this. Just remove the “TPU is not allowed” and change it to “TPU is not recommended”.
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une buse de 0,6 et vous pouvez choisir les profils tpu
pour moi ca fonctionne avec l’ams
French lessons are a compulsory subject at school, so let me try 
:
Merci beaucoup. Il s’agit d’éliminer les obstacles inutiles. Les buses 0,4 fonctionnent également
Excusez mon français, je n’y ai jamais vraiment prêté attention à l’école.
Hey, thanks for the post. I’ve yet to read it, but it seems that thread is more in line with what I was thinking.
Actually, no, what I was thinking was “@BBL - change TPU not allowed to TPU not suggested”.
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you are welcome. First recommendation I got in this Forum was to pretend TPU as a different material… However, in the meantime I can life without TPU on AMS since there are also other ways around. I can now handle even large ASA parts (UV residences) and have an Adventure M5 that is always loaded with TPU.
There’s just a whole series of knock on effects from faking one material as another. It’s a shame, a world class product but a very glaring and fixable issue. I bought this machine to get around having to get around stuff.
And on this, I have to get around the machine.
An old topic with no real great solution, so I did some investigations on the AMS Lite. In summary, I found the issue to be with the AMS Lite and the way it manages the filament. When the load process begins, the AMS pushes filament until the printhead detects it or until the filament has gone way to far to make sense. If this fails, the system detects it and stops. When the printhead does detect filament, it begins pulling on it. If the AMS detects that the filament is being pulled, no problem is detected, but if the filament does not pull on the AMS, there is a failure and the systems tries again, twice. Unloading seems to work and once the filamnet is loaded all seems good.
The problem seems to be that the AMS spring is indeed too strong which makes the TPU stretch instead of pulling through the AMS. So, the solution to reduce the spring pressure makes sense, tootally removing the spring would not because the AMS still needs to push the filament. So, the best answer may be to have an adjustible tension on the AMS spring.
The other side effect with a strong spring is that it makes hard filaments like PLA become jagged which is probably why the PTFE tubes wear through over time. So, I really believe a weaker spring is the answer.
For Bambu software, maybe the AMS Lite could be given some extra distance to experience the pull back if TPU is loaded?
Oh yeah, just so folks know: I turned off the check in OrcaSlicer (Skip AMS blacklist check) and now it respects that. Not sure if it is OS specific, but I’ve done that and TPU does exactly what you would think: Works most of the time.
Now I just get a warning that it isn’t advised then it prints anyways.
Adding to previous. The reason TPU doesn’t work in the AMS is because the printhead drive pulls on the filamant and the AMS is expected to see the filamant move. I believe this is because the printer uses that information to determine if the filament has run out or has broken. The problem with the current design is that it measures only the filament movement on the feeder end. It needs to also monitor the filament near the hotend for a flexible which can stretch.
So, what is needed to fix the problem in my opinion is to add a second passive odometer wheel on the hotend side, either inside the hotend or in the hot end hub to monitor the filaments progress. If the filament is seen to be moving in step with the extruder then all is good which would send an equivalent move instruction to the AMS motor to feed the filamant in step. This could be easily accomplished with an accessory product for the A1 using the extra port on the back of the unit.
Well, the AD5X is still not out but we will see and we are not in a hurry.
On the other hand, you are right, nothing changed so nothing to say. Maybe someone added a coffee cup holder, but I didn’t notice that
You can use TPU for AMS from the Bambu Lab store, I think it is less flexible though.
Done, Video starts by 8 min. 36 sec.
