Yet Another Kossel Magnetic Carriage

thingiverse

This remix of the Kossel Magnetic Ball Stud Carriage, created by Tim Watson (aka wittmason), is itself a remake of Forerunnert's Kossel Mini Spring String Effector and Carriage. This revised version introduces several key changes: * **Ball stud distance**: Unlike Tim Watson's original design, which placed the magnetic ball studs 48.4mm apart, this remix offers three alternative .stl files with distances of 48mm, 51mm (to match my Ugly Parametric Magnetic Effector), and 55mm (to align with Duet3D's Delta Smart Effector). You can easily adjust these settings in OpenSCAD if needed. * **Mounting hole location**: Two sets of mounting hole locations are provided: the standard 20x20 arrangement used by Tim Watson, which should work with most sliders, and a customized 20x16 setup tailored for the DB Delta Printer 2020 Slider. If you require different locations or Y spacings, see below. * **Stud nuts**: Slots have been added to securely hold stud nuts, eliminating reliance on plastic retention, which can be unreliable in my experience. * **More parametric control**: Some hardcoded values have been converted into variables that can be easily located and adjusted in the self_locaking_carriage-v3.scad source file. These include ball stud distance (rodSeparation) and mounting hole Y locations (bottomScrewY and topScrewY). After making changes, re-render the design (F6 in OpenSCAD) and export a fresh .stl file. A total of six .stl files are included: 20x20 and 20x16 variants for the 48mm, 51mm, and 55mm designs. The 51mm and 55mm versions have been personally tested, but the 48mm version is also provided as it appears to be a popular rod spacing choice for effectors. Forerunnert's original design aimed to support a spring-based redundant/emergency magnetic arm spring via the top center hole in the carriage. This feature has been left intact as it may prove useful in future experiments, such as implementing a flying extruder. To utilize this design, you will need: * **2x magnetic balls with stud mounts**: These are available from Ultibots, Filastruder, and other sources. * **4x M3 screws**: Three of these should be 7mm plus the required extra length to grip the slider; the remaining one must be 14mm plus that extra length. * **2x or 6x M3 nuts**: 2x for the ball studs and 4x for the screws (assuming the slider design requires them).