Creality K2 Plus TPU Extruder Modification

This is a How to video on how to swap the original Creality K2 Plus' exturder spring with a softer spring, and then install a 3D printed spring perch that will allow the Creality K2 Plus to print TPU filament. This design builds off of the spring perch made by Stranula over at Printables https://www.printables.com/model/1152328-k2-plus-extruder-manual-tensioner/files, and the work done by "Lost in Tech" on Youtube and his work with TPU where he showed that flexible filament requires lighter extruder tension versus harder materials. I designed my own spring perch that uses a square design so that it fits together more easily in the extruder body. With this design, I was able to print TPU up to 7mm3/s on the volumetric speed.

My spring perch:

https://www.thingiverse.com/thing:7003979


Links to Thumbscrews

https://a.co/d/dmcGKCe

Link to Springs

https://a.co/d/5BKdhKS



How to video: https://youtu.be/E1VaU-Txenw