I really like the astrolabicon puzzle by MakeAnything ( https://www.myminifactory.com/object/3d-print-astrolabicon-puzzle-72019 ), but I have slightly larger magnets (8mm x 3mm) and didn't want to buy new ones, so I designed an astrolabicon from scratch where my magnets fit. Still it's the same principle and a pretty close design, so all credits go to Devin Montes from Make Anything.
As 8x3 is a pretty common size for those small neodymium magnets I wanted to share this version with you.
Print 2 of the large pieces and one center piece.
You will also need 12 8x3 magnets and 24 14mm marbles in different colors.
You can print the included printable spheres (print 2 hemispheres and a connector) or use some glass marbles or similar.
I have these magnets, but there are lots of sources:
I might play around with tolerances and add different sizes later, let me know in the comments what sizes you need.
- Embedded the rings deeper to provide better fit and keep marbles from falling out
- Added printable spheres
Known problems: The smaller rings seem to be a bit too small/short now to fit all marbles. Will tune the sizes and update soon.
Print as fine as you like. Variable layer heights help a lot to smooth out the top. Supports can help at the outer rings but quality is also ok without supports.
- Glue the magnets into the according slots - all poles facing in the same direction: on one half have the north poles facing outwards, on the other one the south poles
- If you like you can glue the center piece to one of the halfes
- put the marbles sorted into the rings
- snap the halfes together, they are hold by the magnets
Remixing for different sizes
I have included the fully parametrized Fusion 360 file, so you should easyliy be able to adjust this astrolabicon to match your magnets and marbles
To change the main parameters open the file and go to
Modify -> Change Parameters. There are the sizes and tolerances for the marbles and magnets. Adjust them to your needs. For large ones you might need to enlarge the whole thing, the sizes are all in the first sketch.