I hope to have the battery no more than about one meter away from the motor. I have NO experience with electrisity, so if i say one meter of wire (2 meters there and back again), to have enought power to keep the motor at 1rpm, what size wire would you use to minimize drop? I think the weight it has to push will be around 3 kg, but that's 3 kg if i would lift it. I don't know what it will be since the motor is turning a screw that ends on a smooth surface... Hard to explain but hope you understood some of it...

Hello. I should probably have been a bit more detailed. The "barn door" i want to move is a device designed to move a camera so that it tracks the stars in the sky so i can get pictures without startrails. With the right screw it should move 1 mm/min, the same rate as the sky move.