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Kossel Plus Magnetic Carriage
This is a simple carriage which works with magnetic ball joints and Delrin or POM wheels. You can get the wheels inexpensively from DeltaPrintr.com
This works nicely with my magnetic effector: https://www.youmagine.com/designs/kossel-plus-magnetic-effector
And with my magnetic ball joint rod ends:
It is based on my more universal Kossel carriage:
Contact me at firstname.lastname@example.org if you need an inexpensive source for the ball studs and/or magnets.
2014-08-17: Slightly improved the design. Added a lip to better trigger the endstop switches. Made the ball stud nut traps shallower. Changed the angle for the ball studs from 30° to 45° to optimize the amount of freedom they offer.