So, I want to print using TPU. To avoid issues like clogging or jamming, I am trying to figure out what settings need to be adjusted and such. AI tells me to bypass the AMS completely, disconnect the PTFE tube feeding he AMS into the printer and manually feed the TPU. Also it stated to loosen some screw on the extruder??? Seriously, I am confused. Can anyone offer me some insight on what I actually need to do to print with this TPU??? Thanks in advance
Hi!
There is a pretty coprehensive guide on Bambu Lab wiki: TPU Printing Guide for X2D | Bambu Lab Wiki
I don’t think any extruder screws needs to be adjusted 
Let me know if that helped
I would only loosen extruder tension screws as a last resort
Your ultimate goal is to provide as close to zero resistance as you pull the tpu off the roll. TONS of variable here, maybe your roll is self sticky, maybe its thru PTFE that it doesnt like, maybe your rollers dont roll well, etc.
If there’s resistance, the line of filament acts like a rubber band, and thins out as its being held in tension. Now the extruder is pushing a thinned band of plastic in when it is expecting a full noodle of plastic, and you get random underextrusions. Feed Resistance is TPU’s enemy - which is why bambu + more sell “TPU assist kits” that are basically AMS feed motors.
I’m a big fan of top mount w/ bearing-based rollers, tpu noodle hangs in the air, and a 1" piece of PTFE mounted on the extruder inlet just as a guide. Set speeds to low, and it solves my problems on many different types of printers without having to dive any deeper - A1, P1s, ACKX, Qidi +4, ECC
edit: and dry it. Strings with tpu are generally bigger and gloopier, harder to postprocess away
i just bought the X2D mainly to be able to print TPU with PLA as support filament.
I saw several posts most are very complex.
The comprehensive guide doesn’t cover that.
I’ve printed several multihour TPU prints on my X2D. What I did was remove the top cover and mount an AMS HT there (I found a model on makerworld that attaches to my Sanja riser). From the AMS HT the TPU goes straight into the main nozzle without a PTFE tube (as described in the wiki guide). The AMS HT can be replaced by any drybox (this is necessary where I leave, which is very humid; with no humidity issues you could get away with an exposed spool on a roller)
Hi! I’d like to print TPU 85A or 90A on my X2D’s left/main nozzle and I’m thinking of using the TPU Feed Assist Module to print the TPU out of the drying box, while using PLA or PETG as support material from the right/auxiliary nozzle in the same print.
Bambu’s product page says dual-hotend printing is not supported when the module is connected to the left hotend, because the hotend’s vertical movement may cause unstable feeding and clogs. Does this restriction also apply to the X2D or just the H series?
Has anyone tried this setup? @Elie.georges Did it work reliably, or did you run into problems?