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Air Hockey Robot (an OPEN SOURCE 3D printer hack)
Take a look to http://jjrobots.com/air-hockey-robot-a-3d-printer-hack/
You will find there the Bill of materials and instructions about how to create your own AIR HOCKEY ROBOTIC TABLE (I will give you an advise... it is not easy to beat!) :-D
ENJOY IT! (and if you need a helping hand go to the JJROBOTS forum http://jjrobots.com/forum/)