yep, i was just thinking to myself "i need an actuated ball joint" ...for animatronic/robot hip & shoulder

try the abeenics 3DOF gear. its an amazing design

Thanks for the question. I wanted to try a few things with it, but now don't think it will really be suitable for any of them. I did design a smaller one to try as an eyeball mechanism. The thinking being that the heads of robots are usually rammed to the brim with electronics, so it could save valuable space compared to the usual animatronic eye configuration, however this doesn't have eyelids, so would need additional servos outside anyway. Another idea wanted to try is attaching strong neodymium magnet where the 4 bolts are, and then the yellow layer would be covered completely by the black outer shell..this was looking to try and make a megabot from the movie big hero 6, but all sorts of problems with that. What inspired originally though was when came across this, grabcad.com/library/jarde-dummy-1, and just thought could make some nice looking robots with a spherical joint, but all existing ones are very complicated/expensive. I am working on an improved version with more powerful/accurate motors, and making a robot arm to see if it will work. cheers

thanks, will do!

@@AuroraOB and he never did the end.

If you open up the fusion 360 file he provides it petty simple to understand

@@zopzapzoopflap8628 It doesnt show the bolts used....