<https://community.ultimaker.com/topic/16124-why-is-retraction-distance-set-to-65mm-in-cura-231/#comment-165155>
<http://schema.org/text>
"On um3. If you observe the material on the top of the cores where they have a gab, and you see what happens when it retracts 2mm you will see that it doesn't move. Because that 2mm are just to release the pressure from the filament onto the cores. So from 2mm to X you actually move filament. I been doing tests with my workingprogress 1.75 cores and I can retract 3mm and actually move filament and stop dripping. But if you change the retraction value, remember to compensate the toolchange retraction distance or you will have increased the chances of dripping while changing tools.  \nSo, just a note. If you change one, remember to adjust the other. "
<https://community.ultimaker.com/topic/16124-why-is-retraction-distance-set-to-65mm-in-cura-231/?tab=comments#comment-165155>