Replacement Orange PTFE Tube

Hello! Recently, I’ve had some major success and problems with my MMU2. However, the most important problem I have currently is with the orange PTFE tube.

Originally, I was using the default extruder setup (as directed with the manuals) but noticed that there was a lot of resistance in the tube. I opted for a new style of connector for the long orange PTFE tube, which bypasses any added friction from having to pass through the bottom Festo and short white PTFE tube before reaching the extruder gears. I was using this:

However, now I’ve noticed that the orange tube has basically stripped on either end (when I noticed it the first time I flipped it around and now the other end has stripped) so that when loading filament, any slight resistance causes the orange tube to slowly lift up about 2cm and thus filament doesn’t reach the pulleys and a layer is skipped.

Now that I’ve fixed most other issues regarding friction and tension, I think this is the only possibility for layer skips that hasn’t been ruled out yet. (Pictures)

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Sorry the pictures are a little blurry, but the point is that the ends seem to have grind/dragging marks from the couplings I was using at the extruder (the Festo one on the MMU was perfectly fine, even when fed the stripped end).

Is there a site where I can buy a replacement tube? I don’t think the couplings I bought from amazon for the thingiverse file are fit for the task of keeping the orange tube in place, so I’ll stick to the Festo couplings from now on.

Thanks for your time!



Hey everyone! Just a clarification, I’ve solved my own problem by switching back to the stock setup for the PTFE tube with the Festos instead of the bypass couplings I bought off Amazon. I understand it’s the new year and all so no rush on anything else. It would be good to know what the diameter/length of the long orange PTFE tube is, though, just in case I need a backup.

Thanks, and happy holidays!

Answered! View the answer I have this problem too

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Found it on the website, when I was just scrolling around the e-shop, ya know, like you always do :)

Thanks anyways!

Also, yeah, if you’re going to try the Carbonbased/0Calvin setup for the orange PTFE tube, I suggest getting a better coupling than the one he had an amazon link to. Or at least, make it so your filament tips are always perfect and never cause resistance in the pulleys.

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Mathieu will be eternally grateful.
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