Let’s make a marble run!
Each of you will design a segment of a marble wall track.
The marble will need to successfully travel from one segment to another.
That means you need to work with the person above and below your run to design a smooth transition from one segment to the next.
What you know:
1. The marble is a 12.7mm in diameter steel ball bearing.
2. Your track will attach to the whiteboard with magnets. Make sure you design has space for the magnets.
3. Each track segment should be no longer than 150mm from end to end.
4. Each track segment will need to be angled so the ball travels down to the next segment.
5. Each segment will attach with three magnets that are 1.5 mm thick and 30mm in diameter.
6. Each segment needs have guardrails or a tube to keep the marble in place. A flat ramp won’t work.
7. Include something unique that shows your creativity and design skill. This means don’t just make a tube.
Examples:
-a shape to catch the marble
-a hole to drop to the next segment
-steps
-a spinner
-????
What you need to do:
1. Check out the list below and meet your neighbors.
2. Talk with your neighbors to figure out:
>how the marble will drop
>which end will catch the marble
>which end will drop the marble
3. Then draw your design on the handout. Click here for some examples.
What do you turn in? Complete step 1 and step 2.
1. Canvas: a screenshot from Tinkercad of your finished design. How to take a screenshot in Windows.
2. For printing: upload the STL file of your design to this Google Form.
Here’s how to convert files to STL:
-in Tinkercad click the EXPORT button in the top right hand corner. Choose STL as the file format. Pay attention to where the file downloads on your computer. -make sure that the file has your last name (like milsteadcompleteshape.svg). No name=no 3d print.
When you are done click here to submit your design.
What if I am at the top or bottom of the run?
The segment in the top position will need to hold the six marbles so that they can drop one at a time.
The segment at the bottom of the stack needs to be able to catch marbles as they arrive.
Here’s the order of the track segments:
