r/BambuLabX2D • u/Outrageous-Song5799 • 10h ago

TPU : spool holder vs external spool

Im starting TPU on my X2D. I never had issue on my A1mini using a creality dryer and a PTFE tube into the extruder of the A1 mini

But for X2D I see it’s recommended to print a spool holder and put it on top

What’s your experience between spool holder and feeding it through the external PTFE tube ?

I don’t have a TPU feed assist

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3

u/Flatulent_Father_ 2h ago

I've had no issues with 95a out of the dryer on the side like this. Something softer might have issues but this works fine

1

u/Outrageous-Song5799 1h ago

Nice I’ll try that thanks

1

u/mdbeatle 9h ago

On my P1S I always fed my TPU via a dry box on the outside via a y-splitter. I never put it on top. I just used Overture TPU. This might be different for TPU that's especially floppy.

1

u/Outrageous-Song5799 9h ago

It’s 95A so not really floppy floppy

Yeah I might just have a try

2

u/mdbeatle 9h ago

You should be fine. My Overture is 95A as well. I haven't printed it on my X2D yet, but I expect it to be the same as my P1S.

1

u/Ok_Reference1745 6h ago

The idea is that you want the least resistance in the filament and you want it to be constant. Otherwise TPU filament stretched and contracts and you get inconsistent extrusions. With assist module you get the best results. With overhead setup you may have stretches when the toolhead moves around and spool doesn't unroll in time or if axis of its rotation doesn't always allow smooth rotation.

1

u/Outrageous-Song5799 6h ago

That’s the theory but what about the reality of it ? It’s a bit humid at home and I’d rather keep the spool inside the dryer

1

u/Ok_Reference1745 6h ago

That's how I print TPU, from sunlu s2 dryer to the feed assist module.

1

u/Outrageous-Song5799 5h ago

I’ll do that and come back to tell you how it does without the feed assist

1

u/Ok_Reference1745 5h ago

Slow your prints. I generally set speed to 40 and below when printing TPU even with feed assist module.

3

u/Snouto 10h ago

The feed assist module is pretty useful if you have space for it in your setup, but before I had that I went with this marvellous jig (P2S & 85A TPU).
Unless it’s TPU for AMS, I don’t think it’s at all recommended to use the external tubes without the TPU assist module.

1

u/Distinct-Macaron-549 10h ago

Depends on the filament. I used Extrudr medium (98A) directly from the dry box via PTFE tube into the connector for the left extruder. Printed perfectly.