There two major mechanisms of the modular self assembling robot that I want to add motion to, the grabber and the self locking join. I decided to use the cheap and cheerful servos mechanisms to move all the parts, they are easy to replace and attach.
I designed these robotic fingers to fit the Rubber Finger Tips for better grips.
The mechanisms is fairly simple, using 2 servos to grab and release the objects.
Metal contact connector for pogo pins. GND, VCC, 2 signal wires. I milled the boards on Roland modela mdx-20.
I glued them in position. I probably should make them a bit more flexible next time.
The clear box allows me to see the locking mechanism in action and pogo pins in contact.
The grabbing function could be improved by adding pressure sensors on the tip of the robotics finger or adding current sensing circuits for the servos.