Mini Kossel Frame Brace

thingiverse

A lot of you are looking for a new design to suit 2020 extrusion, but I don't have one on hand and I need precise measurements to model it accurately, specifically when the nozzle is at Z0 and X,Z at maximum width (this will give me the lowest point a carriage can go down). If you're willing to share measurements in a comment or private message below, I'll adapt the design to fit your 2020 system. To provide what I need, reply with the following details: the maximum build volume in millimeters, the height of the y or z carriage when the effector is homed in front of the tower, and a link to the motor bracket using 2020. It's essential that you note whether 2020 extrusion uses M4 screws. The Kossel design has been great for many users, but high towers and large 15mm extrusions cause twisting issues within the structure, making adjustments difficult when tightening the belt. I've designed this small brace to mitigate this effect by adding extra support once your Kossel is fully assembled (I recommend temporarily relieving tension from the top frame and re-doing manual calibration afterwards). Please feel free to share a 3D model created based on this design. To print, use settings similar to what you would for standard Kossel parts. I've printed mine with a 0.3mm layer height, 3 shells, and 40% infill; lower settings might not be worth the effort due to printing difficulties. If using the "framebrace_v1" version, note that it slightly reduces build platform diameter (e.g., with a 40x40x20 fan installed, I have clearance issues during maximum object printing). The first time you use this brace, verify adequate movement but V1 offers superior strength compared to v2.