Kossel Mechanical + Magnetic Ball joint effector and carriage

thingiverse

I don't think I am the only one who experienced "flying" magnetic effector. I search the web and only found comments on the strength of the magnet. I've also added a "safety belt" like this - https://www.youtube.com/watch?v=RM1ytIyH6BQ, but it only decrease the severity of the disaster. I think it can be completely avoid only if the strength of the magnet is greater than the force of the stepper motor. However, it may then drastically reduce the life of the magnet due to friction, I think. Therefore, I design 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 surrounded by the plastic more than a half by a little bit. You need to press it in with force. It can hold the arms even without the magnets. By adding the magnets, it then becomes zero back lash mechanism. With such structure, the effector will not "fly away" and the requirement of the magnet will not be so stringent. It is my first design with FreeCAD. Any comments are welcome. Bill of Materials: Metallic Ball x 12 Carbon fibre arms x 6 Countersink magnet M12x3