Coca cola bottle hourglass marble run

Coca cola bottle hourglass marble run 

500ml Coca cola sells in 200 countries so I hope yours will fit, print the test.stl and see for yourself, if top part protrudes on the top of the bottle, you can still use it, just alight tops and then cut the bottle to correct length.

Balls can sometimes stuck on the floors, but it's just a toy. I have used 20 stainless steel balls

BOM:

2x 500ml Coca cola bottles

6mm steel balls

Super glue 

Printing:

No supports needed, all parts are oriented in printing orientation, just floor3B.stl can benefit from some standard supports for the bottom slot, it's printable without supports, but you need to clean holes near the bottom slot with knife.

Print most parts on your favourite profile, floor parts can benefit from lower layer height or adaptive layer height 

Use 6+ walls on bolts( if they ends up tight, reprint them with negative xy contour compensation, just don't force them)

Don't use silk filament for bolts, even standard pla have better layer adhesion and stiffness.

You will need

2x bottom

2x floor pieces

3x pole

6x bolt

Test and connector 

Assembly:

Open yourself a coca cola and then another one ;)

Cut the bottom  10mm bellow the label, insert test print and cut the bottle to the size, small scissors works great.

Glue floors together, pay attention to the hole alignment.

Screw poles to the one bottom, screw bottles together using the connector, build your marble run on the bottom of the hourglass, close is with bottles and insert second run from the top. Fill it with balls, close if with second bottom and secure if with screws 

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Do you like what we do ? Give us download and like. We burn a lot of plastic in prototypes so you don't have too. Thx :)