Hey there
I was looking to buy H2D for my special project which requires printing two TPUs at the same time, 95a and 85a. I know that you can’t feed 90a and 85a in to the left nozzle, but nowhere i coudn’t find if you can feed 95a to the left? Did somebody already tried it?
Unfortunately it wont let you, throws an error. Same thing happens when you try to print with PPA/PPS in the right nozzle.
Thanks mate, that’s bummer
Ya I was hoping to have dual color 95A prints, this sucks for sure.
Is there something inherently different about the TPU profile where you cannot just create your own filament type and just match all the settings?
Yes should be theoretically possible. But I wonder why the limitation to right nozzle, maybe will cause an extruder jam as its not optimal for TPU. Will test this out eventually when I have some time.
BTW, i tried to create a fake TPU profile by changing filament type, but in Bambu Studio it’s greyed out, is there any other way than creating a new filament and copying all the tpu setting?
Why can’t I just change type like in Orca…
You can always cheat…
Create a PETG or ABS profile instead and fill the TPU values in it.
Won’t give you the benefits of more or less tuned defaults but means you print (or try to) whatever you like.
After all - the filament profile mainly deals with temps and cooling settings…
Add a good k-factor calibration and all should be good.
BUT > This won’t mean I can recommend doing this as clearly Bambu has reasons for these limitations.
So if something gets messed or worse there is no chance Bambu gives you a warranty claim…
Big question is WHY there is these limits …
Is the filament transport, issues with the heat removal, mechanical or sensor issues, …
Could be just to make us suffer but without knowing all ‘workarounds’ mean you take a severe risk…
I think when the left hot end gets lowered there is a gap between the extruder and the hot end entry point, that why soft filament like TPU wont work, that is my best guess.
They need to fix this both with AMS restrictions and now the H2D I’ve printed plenty of nonsupported TPU in my AMS’s over the 2 years by tricking the profile settings I should be able to do what I want with the nozzles in the H2D as well. Hey give me a toggle that it’s not supported and let me try. Making profiles to trick it is annoying.
So I’ve tried to print TPU 95A using left nozzle with PLA, mad a torture test, it worked fine until it clogged, but i didn’t disassemble it, just applied some force to take the filament out, so I’m not sure what exactly happened.
But i couldn’t see any issues with filament getting inside gears, so most likely it clogged in the cold end or in the moving part of mechanisms that raises hotend
The mobility of the left nozzle requires a telescopic filament path. this means that the ID of the cold end is larger than normal in certain sections which is a problem with soft materials which need an extremely restricted filament path in order not to jam.
Personally I expect that you probably CAN print TPU on the left nozzle, but that it would lead to occasional jams indeed. Bambu Lab is typically attempting to hand hold their customers to a very large degree and restricts their freedom to protect the noobs. If you are willing to make the compromise of reduced reliability, then nothing should stand in your way of attempting TPU printing on the left nozzle.
Even TPU for AMS would jam on the left nozzle, don’t suggest anyone to challenge the devil
I doubt that actually. I think that with some R&D you could probably even get soft TPUs to print fine. Importantly you’d have to reduce extrusion force as much as possible. Slow print speeds down dramatically, increase temps to the max possible and print with the largest nozzle size available to you. If you keep the path through the nozzle the path of least resistance then you give the TPU no reason to buckle and jam. I can imagine that for some use cases this may very well be worth the hassle.
I like the positivity! I secifically went with the H2d for dual nozzle TPU prints and size. But i´ve also just used the P1S and orca for the last two years, so going back to Bambu Studio is a downgrade… Any news for running TPU in the left hotend?
It is already possible. You just need to change one of the flags in the material config file. I don’t remember what it was called, but it determines if a material is printable on only left, only right, or both nozzles. Alternatively you can always tell the printer that you are printing another material with a custom material profile and actually use TPU instead.
Sure this is still true i have been printing tpu for ams for about 150hours on the left nozzle of the h2c … Didn’t even give me a warning just told me todo a coldpull first.
Daniel.
maybe it has changed, but repeated retraction still has a chance of jamming
I am a little confused the retraction has todo with the ams mostly and thats why you use tpu for ams no ? I never pondered this since the machine didn’t give me a warning. I assumed it would not allow me to use the left nozzle for any other tpu type unless they change it. They have already hinted they would allow it on the left nozzle in a firmware update so clearly they also feel the little movement of the nozzle itself is less of a issue or maybe they will slow it down or something ?
That’s why we will have to buy SnapMaker
