Nozzle requirement: TPU, PPS, PPA, PET

So they recommend the right stationary nozzle for TPU and left nozzle for PPA/PPS/PET. I wonder why…

I was planing to run the AMS HT for PPS/PPA/PET and TPU, looks like that wont work. Will have to run AMS HT on the right nozzle, and feed TPU externally since it cant go though the buffer, so it has to go though the raised glass to bypass it, big pain in the ass. Glad I still have my P1s, will be my dedicated TPU machine.

curious where that table came from? from the Wiki somewhere?

Yup from the bambu wiki or from the hot end listing on the store, I dont remember.

have you noticed any issues in Bambu Studio with trying to print TPU with another filament (ABS, etc.) in the same print? for some reason my slicer is saying “Unable to print multiple filaments which have large temperature differences together” - which seems really weird as i thought that was only an issue with a single nozzle?

It’s from hotend listings on the store

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There is a setting you need to checkmark …

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amazing - thank you so much! i should have found that myself. although i sort of assumed selecting the H2D as the machine would have already toggled something like that :slight_smile: appreciate it!

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I think the biggest reason to limit brittle PAs to the stationary nozzle is that its less likely to break the filament that has been sitting in there for a while. Similar for the TPU, my guess would be that the TPU can bend and flex out of the filament path if it is on the left nozzle with its up and down motion. Basically, I believe they are just giving you the best chance at success but it will likely work in either.

Yes makes sense for TPU but they limit nylon to the left nozzle, the one that moves up and down!

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there is a tpu bypass port. so at least you dont have to raise the glas

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Yes but you do need to lift the glass for TPU 90A and 85A.

I believe the 90A is fine to be feed through the rear TPU port. There is also a page in the Wiki that suggests the 90A needs to go in directly to the toolhead like the 85A, but the next section shows and states the TPU port is the way to go. Not the best written guide, but I think it gets the point across.

https://wiki.bambulab.com/en/h2/h2d-tpu-printing-guide

ah thanks, i didnt thought about that.
i played around with 83a. and yes, my experience with it is, that you should avoid as much friction as possible. so 30cm less tubing can be the needed difference. but i will give the bypass port a chance :sweat_smile:

CNC kitchen tried feeding the 90A through the bypass port and had major problems, it has to be fed directly in with the glass lifted.

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