156B Week 3
Overview of Status of Analysis, Design, Fabrication, Tests, etc.
We finalized that we will go with an aluminum cart.
We finalized that we will use aluminum because it's lightweight and easier to machine than steel.
We finalized that we will use POWRGRIP suctions cups that we introduced in our design proposal presentation.
We are researching swiveling casters with locking capabilities, but no further actions will be made until the cart comes in.
We are planning to stick with using gas pistons for our assisted motion, so further research will be done to find the appropriate gas pistons for our machine.
Accomplishments from Previous Week
Presented design proposal presentation to sponsor and maintenance staff
Completed draft report sections that were assigned
Came to a few conclusions about components that were most likely going to be used in the final design
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Email Dr. T and get approval on purchases - Max
Prepare purchase orders - Max
Order aluminum cart - Max
Order suction cups - Max
Order aluminum material - Max
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
(4/8/15 | In Person) - "Great job on your design proposal presentation. Regarding the cart, what kind of wheels will be used? Pneumatic?"
Response: Pneumatic wheels were definitely an option, but considering that they have the possibly of resulting in the cart getting a flat, we decided to consider either polyurethane or rubber wheels. They are less likely to result in the cart being completely unusable if they get slightly damaged in the long run. Also, these wheel materials still allow for ease of rolling on the surfaces in and around the apartment.
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
(4/6/15 | In Person) - "As far as fastening vs. welding, I think welding the large support arms to the base of the cart and fastening everything else would be the way to go."
Response: We agree with this. We will consult Tom Chalfant further as we get closer to actually welding and fastening things to our cart.
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
(4/6/15 | Online Feedback) - Many students are concerned with possible tipping of the cart and how much force is actually required for those gas pistons to work the way we want them too.
Response: From the beginning, we were also concerned about possible tipping, but after doing a moment calculation, we calculated approximately how much of a counterweight we would need to balance the system. As far as how the gas pistons will work in our system, we are still looking up information and are going to seek Dr. T for help with this component in our system.
Risks and Areas of Concern
We are still concerned on how exactly the gas pistons will work mechanically on our machine.
Resources or Information Required but not Available
N/A
Schedule
Describe upcoming milestone
Update Gantt chart.
Budget (list amount spent and amount remaining)
Amount spent: $0
Amount remaining: $4500
Progress on Report and Webpage
Assigned draft report sections from the previous week have been completed
Links to the components we plan to order will be added to the webpage soon