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Bowden pushed out printing head (UM2)

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The bowden tube gets pushed out of the UM2's printing head.

This little white "ring" (whatever this might me called) can't secure it

anymore. Every few seconds, mostly during retractions, it gets pushed

up a few millimeters.

What are the best short- and long-time options to fix this?

Maybe completely removing the tube, cutting 2..3mm off and putting

it back in?

Roughing the tube?

Is there any (better) replacement available?

I appreciate any of your ideas :)

 

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when the bowden is damaged at the gripping point cutting of a few mm will do the trick.

you can also loosen the 4 main screws of the head assembly a bit, then place the bowden, and tighten the 4 screws again... but do not tighten to much as you will put to much pressure on the white PTFE piece which in turn might wear out sooner.

 

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Take it out.

Cut 3-7mm

Put back!

Now: it can be really fiddly to get it back INSIDE the top of the teflon coupler.

Make sure you do! Move it up and down while holding the collett down.

Then, when it is inserted into the teflon, WHILE holding it down firmly, raise the collet, and insert the horseshoe.

You may consider a thicker horseshoe, make it from here:

https://www.youmagine.com/designs/bowden-locking-clamp-clip

https://www.youmagine.com/designs/ultimaker-bowden-clip-thicker-version

I prefer the lower one.

 

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