I have an X1C. I can feed 95 TPU (softest) through back non-ams filament entry point.
Reading about H2D, they state you need to take the cover off to feed directly to extruder? This defeats keeping AMS on top, etc. Has anyone USED soft tpu, and fed it frm the BACK filemant port on the H2D? it seems like it would have the same path as teh X1C (or similar) ?? any feedback appreciated. thakns
I think 95A should work though the TPU port, but 90A and 85A will need to be fed directly into extruder without a PTFE tube. CNC kitchen tried 90A though the bypass port and had major under-extrusion and failed print.
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thanks for reply. if you need to go directly into extruder, doesn’t this screw up complete machine layouts, move the AMS, open the top, etc, causing chaos when using? it seems like the TPU was an afterthought…
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Ya for 90A and 85A will be a big pain in the rear. I do recall one reviewer saying bambu is working on some “solution” to the problem.
I am keeping my P1s as my dedicated TPU machine. I also mostly print 95A so thats not a problem. I was thinking of doing those TPU sneakers, but after seeing the setup hassle and the price of 90A gradient TPU, I changed my mind. 
thaks for reply.
i can live with 95a right now; i have been doing o-rings, fixing faucets, etc. it works great ! and feeding into back of the X1C has done very well. I DO hope they come up with a solution to make it easier. i’m not getting one in very near future, but will get that one (H2D ) to upgrade my X1C at later time. Question, is there a site to REQUEST improvements? I can put in a vote to try and fix this…
Dont know if you saw this:
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thanks for reply. I’m confustd as to how he ran additional PTFE, he still has to reconnect it when running TPU? I will reveiw it more, see if i can decipher it. as I don’thave the H2D, it is hard to visualize ths.
So he just added a 3rd tube and its going out the TPU bypass and to the external spool. That that little holder will hold the 3rd tube for easy access. You just swap the hot end PTFE instead of reaching back and removing it from the buffer each time. I think he has a video on the listing.
I was considering making a y-splitter that mounts against the rear wall and splices in the PTFE right after the buffer and then joins both (upper buffer and TPU bypass) and goes to the tool head with one tube. In that case, it should be MUCH easier to transition between 95A/90A (per Bambu). The only problem I’m finding is it would be kinda loud (banging out when the toolhead moves) as it can’t be physically mounted to the machine because it has to let the buffer move the line back and forth.
I’m also finding, because I don’t plan to use multiple AMS’s (though I might buy an HT) and can largely just leave it in the TPU bypass fulltime. The path is pretty straight so I’m not terribly worried about brittle filaments.
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Yes i was thinking about a slim y splitter as well to reduce fiddling with ptfe tubes. Something like this:
I’m confused. is a splitter needed inside, or can be one used outside? see this one (splitter, ed johnson, printables) - i added 18mm magnets to hold it on the case.
can such a spllitter be used on te H2D, or does one have to be inside the case itself? and, for the other person’s post about adding a third ptfe line , for the TPU, don’t you have to still manually hook/unhook it each time, the right nozzle does not have two ptfe inputs, does it?
I plan to use the splitter to combine two PTFE internal tubes into the one hot end entry. One of them will go to AMS through the buffer, and the second line will go to TPU bypass port and external spool for 95A TPU. That way I dont have to mess with PTFE tubes to feed TPU from external spool.
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NOW i see what he did. that gizmo he made is just a filament PLACEHOLDER, so that can easily change the RIGHT NOZZLE PTFE tube from the “BUFFER” input, to the ptfe tube that comes from the TPU input.
So, Maximit, you were thinkig of puttig a splitter INSIDE the bambu, and take INPUT from the “BUFFER”, and input from the TPU input, and combine it to one?
wouldn’t that splitter be a problem, with constant motion, possible disconnect of the PTFE tubes?
Only one way to find out… but my guess is if its a slim one it might be fine. I plan to put it near the hot end right after the bend.
I didn’t see it disconnecting the PTFE (although it could), but I expect it to be loud. Smack, smack, smack, every time the head moves to the right side. We might be able to take Bambu’s fix for slapping the chain and cables against the side (a padded tape).
OK, here is a related solution. Medical IV tubing Y-splitter. We need something like this. It is molded; we need bambu to provide a “Y” piece of PTFE, and the splitter would be at the inside back of the unit, with one piece of the “Y” going from the filalemt buffer, and other upper end of hte “Y” going from the TPU inlet, and the combined piece going from that “Y” to the hot end. This type of flexible material (probably clear TPU itself) would help lessen or eliminate any banging, or motion of the tube, as it would be near the back inlets of the filaments. I know people are printing splitters, but a molded all-in-one piece with 2-ptfe-to-one-ptfe, of appropriate length, would help mitigate all the designing we’re trying to do,
How to send this to Bambu to at least look at, as something of a solution? This then makes it similar to what I do with the X1C, while my splitter for that is on the actual back of the unit. Then, at least I could probably do the 95A filament TPU (or at least try)
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I printed the Y splitter from TPU for AMS to make it somewhat softer than PLA/ABS. When my H2D arrives will see if it works well.
where will you insert it? at back end, to incorporate the FILAMENT BUFFER input, and the TPU input, or further up toward the nozzle? I’m interested to see how it does. if you could, use this thread, i’ll keep a link to it on my desktop
Towards the nozzle, will post a photo after it arrives and how it worked out.
