Next task was to design the movement for the laser up/down (latitudes). The laser need to have its rotation centre in the centre of the earth globe for the easiest control.

Because I couldn't find a motor with high gear reduction and right hand output with short lead time, I started to design my own with a 1000:1 motor and LEGO gears.

Unfortunately the result was not perfect and I had to order correct motors from China, that halted the project for a couple of weeks...

But the new motor was worth the wait.

The difference of the two motor designs.