Main axle

This picture shows how the main axle at the side of the arm is constructed. It consists of two parts. The first part has pinions #26 at both ends. The left one is driven from the motor by a worm-wheel #32, the right one drives another #26 on the second part of the main axle. A worm-wheel in the middle of the first part is driving the short vertical axis as already described above. De division of the main axle and the gearing used, ensures correct movements of earth and moon with respect to the sun.