Compound Machine
Preliminary sketches
Finial sketches
Building process, testing results, and modifications
To begin our building process as a group we began brainstorming . we started to put machines together and one thing lead to another and we got a general idea. At first we were unsure how to hold everything together, but then we stole the big metal sheet and attached all the pieces to it using axles and end pieces to hold everything on. Our group worked really hard and we all contributed to the project. We tested our design by going over to the light switch and turned it on and off. The tests mostly work and caused us to change our design. At first we had a rubber piece attached to the gear and sprocket to turn the light on but after testing it we determined it was to flexible so we had to change it to a hard plastic piece. Other small changes were made throughout, such as changing the end pieces and adding the pulley. Overall we killed it and no one could come close to the skill our group had thanks to the power of team work and friendship.
Finial calculations
Finial picture
Finial design
Conclusion Questions
Which mechanism was the easiest to determine the mechanical advantage or drive ratio? Why?
The pulley because you only had to count the strands.
For which mechanism was it the most difficult to determine the mechanical advantage? Why?
The gear because i had to count all the tiny teeth.
At what value would you estimate the input and output forces of your compound machine? How did you arrive at your estimated values.
We put in around 2 pounds of force and our machine exerts around 3.
What modifications could you make to your compound machine to make it more mechanically efficient?
I would add a motor so that i wouldn't have to add any human force.