Aeropic's equatorial table driven by wire

I changed the drive system of my 3D printed equatorial table. Previous concept was with a lead screw, it had some drawbacks mainly backlash and software complexity. This new concept uses: - a planetary geared stepper motor (1:51) which provides plenty of torque - a wire - a spring - a cylindrical North sector only used to guide the wire Pros of this option are: - a much more stable platform with no backlash. There is a very minor springy effect due to the wire and the spring, but this is not visible during imagery - return to home is much faster - observation can be started whatever the initial table position as the motion is fully linear - firmware is greatly simplified ! more details on previous concept here: https://www.youtube.com/watch?v=ka9uXJvbwiM see the results on the Moon and Jupiter: https://www.youtube.com/watch?v=I6fJBA_TYC4 you want to build yours? Go here https://www.thingiverse.com/thing:6362263