Clean the Bowden tubes
Particles in the Bowden tubes can impede smooth movement of the filament or mix
colors. To clean them, the Bowden tubes have to be removed from the printer.
1. Remove the material by navigating to
Material/PrintCore > Material [x] > Unload
. After
this, turn off the printer
2. Place the print head in the front-right corner
3. Use a fingernail to remove the clamp clips from the tube coupling collets at the print
head and feeders
4. Press down on the tube coupling collet in the print head and at the same time, pull
the Bowden tube upwards, out of the print head. Repeat these steps for the feeder
5. Cut off a small piece of sponge or ball up a piece of tissue
6. Insert this into the feeder end of the Bowden tube and push it all the way through the
tube with a length of filament. Do this for both Bowden tubes, using a clean piece of
sponge or tissue for each
7. Insert the Bowden tube into the feeder by pressing down on the tube coupling collet
Cleaning the Ultimaker 3 – Ultimaker Support
https://support.ultimaker.com/hc/en-us/articles/...
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