Robot Legs Parts List
For those who are interested in where I found the parts to build my biped legs.
I’ve used a combination of Lynx Motion Servo Erector set parts, MicroRax aluminum beams, screws and washers from OSH, and the Dynamixel AX-12 servos. There is a bit of improvising to get everything to fit together. If you try to screw down the Servo Horn Bracket into the MicroRax Aluminum beam, there will be a small but significant gap, so a washer to fill that gap is necessary to keep everything tight and snug. I also had to make a custom part to fit the servos to the aluminum beam. Some may say that is overkill, and prefer to drill into the existing servo brackets. I found my approach more precise and neat, even though its more expensive.
Parts list:
Aluminum Interconnect / Servo Horn Bracket
Aluminum “C” Servo Bracket with Ball Bearings
Aluminum Robot Foot (Pair) (Brushed)
And I just found more here
Ax-12 Servos (These make the project expensive)
And I’m using the Arbotix Micro Controller as the brain for now. (More info on using this controller)
The shocks you see on the knees and ankles are there mostly for stability, the amount of resistance they offer will probably be an issue, and I might have to remove the spring itself. I really just need some friction.
That’s the quick list of details, without getting into quantities. My background is in Arts and Animation, that is my approach to this project. I’m not thinking things through like an engineer would, which means I am probably making many errors, and this design is very inefficient. I welcome all feedback on how I’m doing it wrong. Take my advice with a grain of salt!