Looped marble run for the 7mm steel ball used in the MMU3.
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updated February 9, 2026

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Looped marble run for the 7mm steel ball used in the MMU3.

Printed in 0.25mm nozzle, at 0.12mm layer height, but can be printed with a 0.4mm nozzle as well.

A mid print pause was used to allow the insertion of the metal ball. If oriented as in the 3mf, it should not interfere with printing at all. 

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The author marked this model as their own original creation.

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