COMPOUND MACHINE
Design Brief
Gantt Chart
Decision Matrix
Brainstorming
Preliminary Sketches
Final Sketches
Building Process, Testing Results, Modifications
To begin our building process as a group we began brainstorming and putting pieces together along with the ideas. As more ideas were added the design we created was formed. At first we were unsure how to hold everything together, but then we found the big metal sheet and attached everything to it using axles and end pieces to hold everything on. Our group worked well together and shared the work equally throughout the project. We frequently tested our design by going over to the light switch and attempting to turn it on and off. The tests did not always work and caused us to modify our design. At first we had a rubber piece attached to the chain to turn the light on but after testing it we determined it was not strong enough so we changed it to a hard plastic piece. Other small modifications were made throughout, such as changing the end pieces and adding the pulley. Overall we are happy with our design and it completes the task we were assigned.
Final Design Picture
Final Calculations
Conclusion Questions
1. For which mechanism was it the easiest to determine the mechanical advantage or drive ratio? Why was it the easiest?
The pulley had the easiest mechanical advantage to calculate because all that was required was to count the number of strands.
2. For which mechanism was it the most difficult to determine the mechanical advantage or drive ratio? Why was it the most difficult?
The chain and sprocket had the most difficult mechanical advantage to determine because it has the most steps required.
3. At what value would you estimate the input and output forces of your compound machine? How did you arrive at your estimated values?
I would estimate the input force as 2 lbs of force, which causes the out put of force to be approximately 4 lbs of force. I arrived at my estimate by making educated guesses.
4. What modifications could you make to your compound machine to make it more mechanically efficient?
To make our machine more mechanically efficient we could add more pulleys to the pulley system giving it a bigger mechanical advantage, increasing the overall mechanical advantage.
The pulley had the easiest mechanical advantage to calculate because all that was required was to count the number of strands.
2. For which mechanism was it the most difficult to determine the mechanical advantage or drive ratio? Why was it the most difficult?
The chain and sprocket had the most difficult mechanical advantage to determine because it has the most steps required.
3. At what value would you estimate the input and output forces of your compound machine? How did you arrive at your estimated values?
I would estimate the input force as 2 lbs of force, which causes the out put of force to be approximately 4 lbs of force. I arrived at my estimate by making educated guesses.
4. What modifications could you make to your compound machine to make it more mechanically efficient?
To make our machine more mechanically efficient we could add more pulleys to the pulley system giving it a bigger mechanical advantage, increasing the overall mechanical advantage.