Design Brief
Gannt Chart
Decision Matrix
Brainstorming List
- A 2nd class lever moving a gear moving a chain and sprocket system using another 2nd class lever to turn the light on and off
- A 2nd class lever moving a pulley that turns a wedge to turn on and off a light
- A lever cranking a complex gear system moving a wedge up and down
Preliminary Sketches
Final Sketch
Building process, Testing Results, Modifications
The first day went into this project optimistic and confident in our group's capability to finish this project. But as we got closer to the due date more and more problems came up. But our confidence proved to be our downfall as we were so confident that we ended up not having enough time to finish rebuilding when we realized that we have problems. We ended up changing the gear system but that was really it. It failed both times with the updates.
Final Design Picture
Final Calculations
Gear Ratio: 75out/36in = 2.08
IMA of the main sprocket system = 2
IMA of the lever = 3in-8 1/2 in = .35
Conclusion Questions
- The gear ratio was the easiest to calculate. The formula is simple, and there isn't much that you need to calculate, as its basically just plugging in numbers.
- The hardest to calculate the lever MA; It wasn't easy to measure them, so that was the most challenging.
- Estimated at about 15 pounds of effort force. Because in one hand you are holding the machine, and in the other you are providing the effort, so you are trying to keep the machine stable, but also providing a lot of effort. The gears are not easy to turn, so we have to add more effort for that reason
- .To have gears that fit better together because we don't have a good amount of torque.