Kossel Mechanical + Magnetic Ball joint effector and carriage

thingiverse

I don't think I'm the only one who's experienced a "flying" magnetic effector. I've scoured the web for solutions and all I found were comments on the strength of the magnet. To mitigate the issue, I added a "safety belt" similar to this - https://www.youtube.com/watch?v=RM1ytIyH6BQ, but it only reduced the severity of the disaster. I believe it can be completely avoided if the magnet's strength surpasses that of the stepper motor. However, this may then drastically shorten the magnet's lifespan due to friction. Therefore, I designed a combination of mechanical and magnetic ball joint. Print Settings Printer: MicroMake Rafts: Yes Supports: No Infill: 75 How I Designed This The metallic ball is encased in plastic more than half its size. You must press it firmly for it to hold the arms securely, even without magnets. Adding magnets turns it into a zero-backlash mechanism. With this structure, the effector will not "fly away" and the magnet's requirements are significantly reduced. This was my first design using FreeCAD. Bill of Materials: Metallic Ball x 12 Carbon fibre arms x 6 Countersink magnet M12x3