This week, we focused on building the horizontal rotation system for our solar tracking platform — the part that allows the entire structure to turn and follow the sun throughout the day.
To achieve this, we’re using a Lazy Susan bearing, which allows smooth and stable rotation with low friction. On top of this bearing sits the entire structure: the box, the tilt mechanism, and the solar panel.
To rotate everything, we designed a pair of 3D-printed gears:
- A large 14 cm gear will be mounted around the Lazy Susan, fixed to the rotating upper part.
- A small 4 cm gear, attached to a stepper motor, will be positioned at the edge.
When the motor turns the small gear, it drives the larger gear, rotating the whole structure slowly and with control.
This gear-based approach gives us more torque and precision, making it easier for the motor to move the structure even under load.
We already have the Lazy Susan bearing and finished the 3D model of the gears. The next step is to 3D print the parts and begin testing the system.
Here are some preview images of our setup!
