This page is about building new robotic arms for Robot X so that it can be dressed as more serious robotic characters. Check out the main
project index for the rest.
There are some YouTube videos about this section, or scroll down for pictures and words.
I 3D printed gears from modified CAD I got from
KHK Gears – they are free to download in a variety of formats. I used bevel gears for the main arm rotation and spur gears for the arm lift-outwards.
For upper arm rotation and the elbow I’ve used Hitec Jumbo servos which are geared down 2:1, they are 20Kg-cm servos so this is plenty of torque.
The robot can do a number of poses, I’ve attached temporary forearms, but these will be replaced with character parts for the next Sci-Fi robot.
Arm controllers are fitted – each arm is an i2c slave device from the main Arduino Due. I’ve also designed a new remote – check out the video above to see it in action.