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This is a design for the esso design challenge on my mini factory
rollercoaster that can be build with drinking cans 250ml in combination with 3d printing.
for a working view see the youtube link.
you can start printing with the track en can connectors. Build it all together and than take a 3mm filament for the rail. It will click in to the rail parts.
The rail is connected with parts that can be adjusted in the right direction.
the cars can be joint together by the car to car connector. you can place this by the bearings that are on the top op the track. Leave a little room so they can move with the track when the cars go down the track.
i used bold and nuts of M5, M8 and spacer ring M8. M8 and spacer ring for the bearings (608zz) and for the other connections M5.
Best print and fit is with a ,35 nozzle ,2 layer height.
for the track you can select different lengths. The track part 3 is a flexible part that allows you to twist the track. This part you can also cut it to the right length.
the track parts slides together with al little pressure. It is designed to fit tight. so it is possible you will need to sand it down al little bit for a good connection.
I added some pictures so you can see how everything comes together.
enjoy printing and building your own rollercoaster.