1) Fixing the pico program
So when our car drives across the rod, it will go a longer distance forward than it goes backwards. This is because we had it on time. We changed our program to be based on distance with a count. This made the distances forward and back match better but they still don't match perfectly.
2)Wheels
When we built our initial vehicle with two wheels that are the same radius but they were different firmnesses- one was super squishy and the other was very tough. Since the distance forward and backward was still off, it was time to address the wheels. We found 2 firm wheels and tested them out (they slipped). We also switched the motor out and used squishy wheels. It drove across the rod very well with good speed and the distance it went was pretty consistent.
3) Weight
To perfect our vehicle we had to get the balance right. I brought in a 'bag of nature' (rocks) to hang from the lighter side to get the balance. Over the weekend we used balloons filled with water. We found a nice, but not perfect balance with the rocks. It's good enough for now. This is something we can easily tweak later.
4) The Stand
Since this is meant to open a window curtain, we need a fake window frame for the exhibition. Here is what the design looked like:
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