Redsalamander's Extruder

thingiverse

I began with a QUBD extruder and printed various upgrades for it. The extruder I based this on was dependable, and I used it until about a year ago as a direct drive. On my newer printers, I modified the design so that instead of a heatsink and fan mounted to a small cooling block on the motor, I created a large heatsink with fan that the barrel screwed into, and the motor and mount were placed on top. Later, I changed this to a bowden design, and this design can still be used as both a direct drive and a bowden. The arm has undergone significant changes from the original. The biggest change is that the bearing mount now requires an 8mm shaft for the bearing, approximately 15mm long. I use a larger diameter spring, sourced from RC model car suspension shock absorbers; smaller springs can still be used, but you may need to add a cutout to the arm. The frame mount is designed to attach it to a 25mm frame - I use 25mm square tube aluminum frames on my machines - you may need to design your own to meet your requirements. If you do, please feel free to send them and I will include them in the files. The pictures attached show; the evolution of the design over time the assembled extruder close-up and entire setup the bearing groove for reference If you want to see more and how I create prints and 3D designs like this, check out my YouTube channel at https://www.youtube.com/channel/UCSHUc93NXGwBacoIDDqPU2w.