Infinite double Marble run

This model cost me a lot of effort, finally after many modifications I am satisfied with it. I hope you will like it too.

The model has two types of drive - manual or electric. The N20 motor is used with low speed, 50/min.

Replacing the drive is easy, just change the cover for a specific sub. The other parts are identical for both types.

You can glue the elevator body and track parts together

For the spiral and tracks parts, use a wide brim when printing!!!

I optimized the model for steel balls with a diameter of 8mm. They can be purchased in a regular Armyshop as ammunition for a slingshot.

It's a good idea to put at least 12-15 balls on each side so that the ones at the bottom keep pressing on the ones at the beginning of the elevator.

Two types of drive

Two types of drive

Instructions:

Detail of drive

Prototypes - cca 300g filament