156B Week 4
Overview of Status of Analysis, Design, Fabrication, Tests, etc.
After a lot of discussion, we decided to pursue a new square jack design at this time over our previous gas spring design
Our cart, suction cups, aluminum, and square jack have been ordered and we expect them to come in this week
We plan to start fabricating this Saturday
We will conduct a hardware test on our given square jack to evaluate its performance of having a load offset from the jack.
Accomplishments from Previous Week
The week 3 report draft has been completed and uploaded to the webpage
We made the decision to run with our square jack design at this time
We prepared our PO's for approval and submission for the following Monday
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Complete first draft of webpage (Zachary and Albert)
Complete/revise first draft of report (All)
Complete square jack offset load test (All)
Start/continue prototype fabrication (All)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Our sponsor was out of town, so we were unable to meet last week. However, we notified our sponsor of the PO's we were preparing. Also, because we have a new design concept since the last time we met with our sponsor, we plan to present the new concept to them on 4/22.
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
(4/15/15) | In Person - "Why don't you consider using some sort of crank as a mechanical advantage to help pull your gas springs back down 1 inch?"
Response: With our original gas spring design, we had trouble figuring out how to bring the gas spring back down seeing that it would be very difficult to overcome such a strong force. After asking Dr. T for help, it was suggested that we should consider integrating a crank into our design as a mechanical advantage to help us bring the gas springs back to their starting position. However, in the brainstorming phase early in the quarter, we were deciding on using some sort of crank or gas springs to assist us in our lifting motion. Because implementation of a crank in our gas piston design would essentially only serve as a corrector and nothing else, we proposed another design concept that would use only use an square jack to complete our lifting motion. The square jack is inexpensive, the other supporting design components are simple and easy to implement, the movements are much simpler and easier to understand than our gas spring design, and given the time constraints, it would be easier to start building our square jack prototype once we have the materials.
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
No new comments have been made by other students in the class at this time.
Risks and Areas of Concern
The performance of our square jack with an offset load
Resources or Information Required but not Available
N/A
Schedule
Receive initial set of parts
Conduct Moment Risk Reduction tests with square jack
Begin fabricating prototype
Budget (list amount spent and amount remaining)
20ft Square Aluminum tubing: $213.15
2 suctions cups: $270.00
Aluminum cart: $383.89
Square jack: $85.98
AMOUNT SPENT: $953.02
AMOUNT REMAINING: $4046.98
Progress on Report and Webpage
Week 3 report draft has been completed and uploaded last Friday
The first draft of the report and webpage will be worked on immediately for submission on the Friday of week 5