TPU not supported in left hotend

Bambu Lab H2D
1

The fact that TPU is not supported in both hotends beggars belief. The fact this huge limitation wasn’t mentioned in the specs when I ordered the printer is a scam IMHO. And it would cost me over €100 to return it.

Allegedly the reason is the left hotend moving up/down, which is plausible.

Has anyone tried to overcome the problem or should I be the guinea pig? Looking at the video where they show the hotend switches, it looks like TPU could bend (instead of being push up through its extruder) when the left nozzle is raised. But is that always a problem or a mere risk? Also, will there be sensors so the printer says it’s jammed even if such bend doesn’t interfere with anything?

BTW what about “TPU for AMS”? I’m assuming that too is forbidden problematic? If not, I may find ways around this even though that filament is way harder than 95A.

Edit: Forget about “forbidden”, that’s trivial to work around. I’m talking “can it be used some way”.

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Can be used in both hotends (I tried).

Also, calling this a scam is a bit of a stretch, like you already said, it’s because of the moving head.

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That’s wrong!
I think you’re uninformed.
TPU is supported on the right hotend.
However, not in combination with an AMS or via the internal filament buffer.
The Bambu Wiki has a detailed guide for using TPU with the H2D.
I recommend you read this information:
https://wiki.bambulab.com/en/h2/h2d-tpu-printing-guide

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@EinUrElf The OP brings up a very valid question and concern.

What exactly is wrong, @the_Raz clearly wrote not supported in both hotends:

Just like the wiki page you linked to says clearly:

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Logically speaking, the_Raz is of course right. TPU left && right is not possible/not supported.
It read to me as if TPU wasn’t supported at all, which is of course wrong.
People understand what they want to understand.

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I don’t see how this would qualify as a valid reason for return. Of course, you’re free to exercise your right to return it — but why?

It’s been well known for quite some time that TPU 95A and softer are right-nozzle only, just as some brittle filaments are limited to the left nozzle.

Did you buy the H2D specifically to print TPU? If so, the X1 Carbon might have been a better fit for that type of filament.

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It reads as if it doesn’t work in neither, left nor right.

" TPU is not supported in both hotends"

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Yeah sorry for the confusion, I meant the fact I can’t print with two colors of TPU, one in each hotend. English is not my first language.

They neglect to mention this on the sales page. They mention multicolor printing and TPU printing - they don’t say “pick one”. It’s not even in fine print - I see no clue on that page about this. For me the whole point of upgrading from the X1C was using support filament without switching (which is supported), and dual color TPU.

Edit: Even that wiki page doesn’t mention I can’t use 95A on the left side, it only says that for 85A and 90A.

Anyway @simtom does TPU for AMS work on the left side without even fooling around with a mockup filament profile?

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You’re not being scammed… Does Bambu have to tell you that you can’t toast bread with the H2D?

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The way I read the original advertisement was that it was suggested to run tpu in the right nozzle. When I found out the left nozzle wouldnt even accept tpu, I laughed out loud. What a gigantic missed opportunity. If it cant do 2 colors of TPU, what was the point? Is what I said in my head. Just a heads up, alot of people here are going to troll you if you dont agree. Fanboyism and whatnot.

Dont worry about digger, he only shows up to downvote. Never actually says anything.

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If this is accurate and based on the fact both extruders appear identical, it seems purely arbitrary for BL to make only the right extruder TPU-worthy. This is especially true if you have to rewire the teflon tubes for the job (and do so differently between 85A and 90A TPUs!). You don’t want to muck with both if you don’t have to…

As an aside, since the published TPU printing guide doesn’t explicitly call out AMS TPU or 95A, it sounds like those should work fine in the AMS 2?

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Yes, no need for any mockup filament profiles. It’s treated as if it were PLA.

Only TPU for AMS will work in an AMS. 95A needs to be placed on the external spool (or any other external holder) and has to be inserted using the TPU bypass port.

1 Like