Here is another robotic arm you can use for 3D printing, soldering, and other tasks. The Hitbot Z-Arm is a 4-axis collaborative robotic arm that can be programmed to take on almost any task. Simply move it manually to create repeatable motions.
You can use this robot to try 3D printing, laser engraving, soldering, and games. It has a camera for sorting and organizing tasks. The Z-Arm is capable of handling fragile items. It has 0.02mm repeatability and 400mm reach.