Public model of a robot arm on Onshape. A great tool for 3D design and create robotic models.
This arm can be 3d printed and easily assembled. It works with four miniservos and it´s a great exercise to understand the arm movement, kinematics, geometric relations and gears.
Finnally can be programmed with an Arduino board and it can feed you, or it can take a ball and throw it away for your dog. :D

This Robot Arm is based on this model on Thingiverse.
http://www.thingiverse.com/thing:1015238

This project can be editable with different dimensions to extend his functionality with OnShape.
https://cad.onshape.com/documents/5bb...