define the problem
generate concepts
sketches
develop a solution
FINISHED SKETCH
construct and test a prototype
Our original prototype was a machine that had two gears, a wheel and axle, and a pulley system. After we started to build, we had to make that modification because it didn't work.
evaluate the solution
We had to make a couple modifications during this build.
1. We changed the design from 2 gears, wheel and axle, and a pulley to gears, a pulley, and a chain and spocket system.
2. We also needed to put more tools on the other side of the machine to balance the weight out.
1. We changed the design from 2 gears, wheel and axle, and a pulley to gears, a pulley, and a chain and spocket system.
2. We also needed to put more tools on the other side of the machine to balance the weight out.
present the solution
conclusion questions
1. For which mechanism was it the easiest to determine the MA or drive ratio? Why was it the easiest?
I think that the easiest mechanism to determine the MA of was the pulley system because you just needed to see how many strands were opposing the force, and in our case it was only one.
2. For which mechanism was it the hardest to determine the MA or drive ratio? Why was it the hardest?
The most difficult one to calculate the MA of was the chain and sprocket because you either had to count how many teeth were on each gear, which would be very time consuming, or determine the diameter of each gear, and divide the out/in.
3. At what value would you estimate the input and output forces of your compound machine? How did you arrive at your estimates?
I would estimate the input value at around 1 lb because it could be greater or less. I would estimate the output forcesomewhere between 1.3 and 1.7 lbs.
4. What modifications would you make to your compound machine to make it more mechanically efficient?
I would change the top gear of the chain and sprocket in order that it would have a greater amount of effort so it would lift the ping pong ball fatser.
I think that the easiest mechanism to determine the MA of was the pulley system because you just needed to see how many strands were opposing the force, and in our case it was only one.
2. For which mechanism was it the hardest to determine the MA or drive ratio? Why was it the hardest?
The most difficult one to calculate the MA of was the chain and sprocket because you either had to count how many teeth were on each gear, which would be very time consuming, or determine the diameter of each gear, and divide the out/in.
3. At what value would you estimate the input and output forces of your compound machine? How did you arrive at your estimates?
I would estimate the input value at around 1 lb because it could be greater or less. I would estimate the output forcesomewhere between 1.3 and 1.7 lbs.
4. What modifications would you make to your compound machine to make it more mechanically efficient?
I would change the top gear of the chain and sprocket in order that it would have a greater amount of effort so it would lift the ping pong ball fatser.