Define a problem
Generate Concepts
Develop a Solution
Construct and test prototype
Effort is applied at the wheel
Evaluate solution
My VEX lab experience for this project was much better then my experience the first time, I was with people who were willing to let my do some of the project, we moved a moderate pace. Last time, my group members just went very fast and did all the work and if I were to step in I would be too slow for them. Our test results for this machine was that it was able to lift the textbook 12 inches off the ground and hold it there. We were able to accomplish a IMA greater than 1. The IMA was 1.44. One mistake that we did have was not stabilizing one of the support pillars enough, it ended up bending due to the mass of the text book. We were able to make modifications to fix it though and keep the device stable. Some skills that I learned from this project are working with my hands with very tiny materials. Also, I learned to be patient with people and let them do their thing and not frick out if something goes wrong.
Our IMA's were expected and we were able to lift the book. The IMA did not affect our our test results.
Present Solution
Here we are installing the extended arm that will house the pulley system
At this stage we are installing gears to make the sprocket system.
Here we are installing a stability pole to house the gears for the sprocket system and keep things from bending due to the weight of the text book.
Conclusion
The easiest machine to find the IMA was the fixed pulley because the IMA is just the amount of string acting in the opposite way of the resistance and that was 1.
The wheel and axle was the hardest to find the IMA for because we had to measure the diameters for the wheel and axle and divide them and that took more time.
I would make smaller gears on the sprocket so that the gears would turn quicker and the pulley would lift quicker.
The wheel and axle was the hardest to find the IMA for because we had to measure the diameters for the wheel and axle and divide them and that took more time.
I would make smaller gears on the sprocket so that the gears would turn quicker and the pulley would lift quicker.