https://www.youtube.com/watch?v=CjzSeOg8oTs(I would like to embed the video, but doesn't seem to work properly):
[youtube=425,350]CjzSeOg8oTs[/youtube]
AHRobot is an air hockey robot player build using standard RepRap 3D printer parts: electronics, motors, drivers, bearings, belts... and a DIY air hockey table.
JJROBOTS is a website for robotic projects, online shop, documentation, build instructions, "how it work", forums...
Project blog (english) :
http://jjrobots.com/air-hockey-robot-a-3d-printer-hack/