Robo Challenge - Predator

[james...venom]

Been working on the arm mechanism this last week. All the bit have arrived including my nice little ball screw

I really wanted to work the arms off a drill motor as they are nice and easy to replace and can be put under good strain with out burning out when used at the normal voltage. Only snag was its too big to fit in the robot so I set about making the gearbox smaller.