Ultimaker 2 Spring Replacement

youmagine

I've been struggling to achieve more consistent prints lately. One major reason my prints have failed is due to the PTFE coupler shifting during retractions, allowing tiny amounts of filament to get stuck between the hot-end and the coupler. The spring is no longer necessary since Dual Extrusion was discontinued for the Ultimaker 2. This compact tube perfectly fits over the PTFE coupler and inside the print head. If you leave a 1mm gap, it will fit snugly in place. To assemble correctly, ensure everything is aligned properly. Apply gentle pressure, but not too much! Use the 4 corner screws on top of the hot-end to secure it firmly. I've noticed a significant improvement in retraction performance and print reliability since implementing this modification.