9-story Marble Run Tower (8mm steel balls)

It has 10 rotating plates, 9 descent layers (1-9 tracks per layer) The run time from feeding marbles into the input layer (no more than about 40 marbles at a time, with an interval of no less than 20 seconds) until the last marble drops into the collection plate is more than 2 minutes

Of course you can print one layer (+ base) to start experiencing it, or mirror all clockwise track layers to print 18 counter-clockwise layers, or print your favorite layers, it's entirely up to you, with diverse combination methods

The overall fit of the model is very good, and it can be moved as a whole once assembled

-------------------------------------------------------------------------------------------For manual feeding, no need to read below

The lift mechanism has been added, and assembly instructions are as follows

Second step: Allow 4mm of the smooth rod or metal tube to protrude from the bottom, install the bearing, and embed it into the center hole of the base

Third step: Assemble and link the lift tower truss structure, note that the bottom section has a wire hole, the two middle sections are identical, and the top has an inclined surface

For assembly, you can use printed rods or 5mm dowels, note that one of the holes should use a hollow printed rod for easy threading

Fourth step: Assemble the feeding plate structure, as shown in the figure

During assembly, apply lubricant appropriately

Materials list

1: Motor used: Bambu Lab N20-10D-150RPM, 2 pieces (Due to low motor power, it is recommended that the number of marbles does not exceed 50)

2: Battery used: Bambu Lab 14500 7.4V 800MA, 1 piece

3: Bearings used: 10mm outer diameter, 5mm inner diameter, 4mm height, 4 pieces

4: Metal tube or smooth rod used: 5mm outer diameter, 750mm length, will be slightly trimmed during actual assembly

5: Switch used: 16mm diameter

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6: Coupler used

Result after assembly is complete