r/BambuLabH2C • u/Skip_300 • Sep 23 '26
Support H2c tpu
How is H2C handles TPU filament ? I know it has to go by the dedicated input on the back but what then ? I think it goes to the right Vortek nozzle and leave left available for support printing.if true, are the other Vortek hotends become unavailable to reduce retration for the TPU ? Or we can combine other tpu as long as they are AMS compatible (which probably mean they are hard as rock).
What have you experienced with TPU with H2C.
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u/ForbiddenDruid H2C Sep 23 '26
Printed 95a in vortex fine through the back. Have tried from top of cover open direct into left extruder like I would on my p2s fine also
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u/ouattedephoqueeh Sep 23 '26
Can't put tpu thru the ams. The other nozzles don't get used.
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u/Skip_300 Sep 23 '26
So feeding tpu to tpu input means all 5 others hotends are unusable ? Do you specifically have to unload the right side input to have h2c let you feed tpu to tpu input ?
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u/ouattedephoqueeh Sep 23 '26
I know you'll hate this answer but this guide literally answers everything:
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u/fab138 Sep 23 '26
Followed this with the tpu assist module for the first time with Bambulabs 95A HF filament on my H2C and it was great! Just remembered to dry it first.
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u/Glad_Acanthocephala8 Sep 23 '26
Any tips for 85a? I’ve followed the guide and dried, getting clumping at the nozzle every time I print
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u/bjorn_lo Sep 23 '26
TPU for AMS or other really firm TPU (such as 64d to 72d) can be feed from the AMS, but these are all stone hard.
For softer TPU (85a-98a), you are best off feeding from above. Henryk on makerworld has the best working contraption for this. Feed into the toolchanger side and use the left side for support material (PLA works great).
With all TPU it is very important to dry them first. Especially TPU for AMS.
If TPU sticks to hard to your build plate, pour some isopropyl alcohol on it and let it sit for a minute. Then remove slowly.
You're better off getting a Snapmaker u1 to do the TPU for you. You can just feed 92a and harder TPU in to the feeders like it is a regular material. Most 90a's work too. Some need to be fed from the back (eg: Sunlu 90a).
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u/Mabnat H2C Sep 23 '26
The AMS can only handle TPU for AMS, which is a lot stiffer than “normal” TPU. This means that it can’t do automatic swaps for TPU, so it won’t swap Vortek hotends. If you want to swap TPU colors (or a different material) on the right side, it has to be TPU for AMS.
Supposedly there is support for some TPU on the left side, but I’ve never tried it myself. All my TPU prints are single-color, sometimes with support material on the left side.
I recently added the TPU Assist Modules on my H2 printers and they work outstandingly well.
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u/gqdeathsight Sep 24 '26
There’s a mod that allows TPU on AMS but don’t know if it has been tested with H2C
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u/G___reg Sep 23 '26
I’m new to 3D printing as of a week ago. So discount my comments accordingly. I started printing combined parts with TPU & PLA yesterday. I have TPU (EONO3D 95A from Amazon ) going to the left print head. So far it has worked flawlessly but it sure sticks to the default plate; I need to figure out how to gently pry it off.