During our robot building, there were many problems encountered. Since, for many of us, it's our first time to really make a robot, we had a lot of difficulties.
One of these was with the wheels and the motors. We had trouble making axles for the wheels that fit both the wheel's hub and the motors at the same time. But, because of this, we ended up buying different metal rods and hubs. After doing this, our task got a lot easier to do.
Another problem we had was with the motors. At first, we were using motors with a ratio of 256:1, but we soon realized that these were too slow for this year's competition. So, we searched in our materials and found motors that had a 64:1 ratio. This was a lot better, but our difficulties weren't over. The inside of the gearboxes weren't the same. So, the metal rods that we shaved to fit in our previous piece didn't fit in this new one. Because of this, we decided to use the 256:1 motors' pieces in order to modify the 64:1 motors.
Lastly, the main problem we encountered was with the arm. Even to this day, we still don't have a clear idea of how to make it or how to make it work. This is still a question we need to answer...