Basicly you connect 2 objects and most of the time one of them is fixed (not moveable)
There must be at least 1 moveable object.
Then you have to set the speed it is rotating at.
The next one is is the strenght (the heavier the moveable obj the stronger it has to be)
Next one is upper and lower rotation (or how it`s called). Set these both to 0 if you want it to spin a full circle and keep spinng.
Then the axis the rotation is going around. I suggest to put 1 of them to 1 and the others to 0. And play around with them.
And don`t forget the coords of the joints (If you don`t know where to put it, put it to the fixed object).
If you have got any more specific questions i will try to answer them ;)
Last edited by Ukephile; Sep 24, 2015 at 08:00 AM.