K8400 dual j-head

thingiverse

I upgraded to a single head setup. 1. Create space in the heat sink by using a pile of material, it's easy to do. 2. I drilled a hole into the heat sink for an M3 screw to secure the leveling system and nozzles in their optimal position. 3. You'll need four graphite or bronze bushing bearing inserts measuring 8mm x 10mm x 10mm, or similar alternatives. 4. Seven pieces of M3 insert nuts, 4x4mm in size (or create your own mix using typical nuts) are required. 5. I replaced the stepper drivers on X/Y and S109 for extruders with TMC2208 models. 6. For reference, check out this design: https://www.thingiverse.com/thing:2868047 7. This part is also helpful: https://www.thingiverse.com/thing:2326564 8. I implemented separate fan control to optimize performance. 9. To stabilize the Z-axis, use this stabilizer: https://www.thingiverse.com/thing:2741415 Now my printer operates flawlessly, silently, quickly, and smoothly.