Planning & Execution II
Table of Contents
Website should document your journey through MSD, so include work-in-progress as well as latest results. Use pdf's for display whenever possible so that information is easily viewable without the need to download files and open applications. (Your EDGE file repository should still contain original files).
Build, Test, and Integrate
The initial plan when the second semester of Senior Design began was to set milestones for when each of the subsystems should be completed. The group decided to first work on only the first subsystem so we gained an understanding of what to expect regarding unanticipated risks, struggles purchasing materials, personal availabilities within the group and how efficient we would be working. Once we had one subsystem 95% complete we decided to work on 2-3 subsystems simultaneously in order to finish on time and be more efficient.
We began to realize that this schedule would not be easy to follow as perfectly as we had thought and started to make scheduling changes on the fly. We hit certain roadblocks throughout the duration of the quarter which we skipped, brainstormed alternatives, and collectively came to a decision to minimize the risk and complete the task. We found ourselves getting way ahead of schedule on some tasks while others lagged behind.
Each week our MSD II Schedule was updated to reflect our progress and to make any changes for the work we needed to accomplish in the following week.
The test calculations we've shown in our educational pages as well as our Electromagnet Force Calculator and our Mass Flow Calculations for our water wheel began to were tested in reality and compared to the theory.
Particular areas which cause us to struggle were the:
- Electromagnet - due to improper amperage coming from our power source.
- Robot - due to difficulties finding a sufficient wire that is both flexible and sturdy enough to be reliable
- Projectile - due to difficulty creating a launching mechanism powerful enough to launch the weight of the steel ball the desired distance
Test Plans & Test Results
Our testing results can be found on youtube! We've taken several videos displaying many mechanisms fully operational and some in the works.
Spring launcher video:
Instructions on how each individual subsystem can be found in the Assembly Instructions Document. Once the subsystems have been assembled individually, they were then disassembled and glued together permanently. The bases for each of these subsystems was painted brown except for the first two which were painted to compliment the theme.
Underneath the subsystem we've place 2" x 4" planks in order to elevate each subsystem so wires could be out of the way and organized accordingly. These planks were bolted down onto the table to ensure there would be no movement. The subsystems were then screwed down onto the planks also to ensure no movement.
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The subsystem frames were squared up and held together to stability and in order for the lexan case to fit perfectly on the outside. Once all the framework has been secured it was then sanded smooth to make sure all edges were flush with each other. Once this step was completed the frames were stained for aesthetics.
User Operation Instructions
The only user interaction in the Rube Goldberg Machine is the initial pinball-like plunger which launches the ball through all seven subsystems. Everything else is fully automated including each subsystem resetting either mechanically or electronically controlled by an Arduino.
|MSD I||MSD II||Subsystem Educational Information|