Hey everyone,
I saw a video a while back of a motoman robot cycling through some movements. One of the things it did was stick its arms out straight, and then begun to 360 degree rotate a middle section of its arm, while the adjacent sections stayed put. How did it accomplish this without twisting the wires inside? Heres a pic to help describe what i'm talking about:
In doing some research, the only thing that i could come up with is that something like a slew ring was used:
Is there a "hobby" version of this device that can be used?
The application that i am thinking of is like a tree or cactus. I would want to add branch segments from time to time, and i just want to stick them into the mix, and have them rotate, while the rest of the contraption remains still. Here's a rough mock-up of what i'm trying to do. Also, dynamixel servos are too expensive. Perhaps i can just use an encoder wheel and some type of motor to get the position?
