156B Week 5
Overview of Status of Analysis, Design, Fabrication, Tests, etc.
FBD analysis has been completed
Initial Parts have been ordered
Accomplishments from Previous Week
Made a big design change shifting from our previous gas spring design to our jack design. Both Dr. T and our sponsor approve of this new design.
PO's were sent out for our aluminum, cart, suctions cups, and square jack.
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Begin cart fabrication/prototyping - All
Research and prepare PO for locking casters - Albert
Design/Find brackets - Max
Finish report draft 1, executive summary, website - All/Zach
Decide on which bearings to use, prepare PO - Nate
Create PO for rotation lock mechanism on suction cups - Nick
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
(4/22/15 | In Person) - "I like the new design that you gentlemen came up with. Once the machine has secured the window, have you guys thought of anyway to support the window in some way so we can reduce the risk of the window slipping off?"
Response: Although the suction cups we have selected have a visual and audio warning system built into them, we have also thought about the issue you have presented. We might have some kind of stool-like object that is separate from the cart that one could easily slip under the window and act as a rest.
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
(4/22/15 | In Person) - "I like your jack design much better than the gas spring design. Will your cart wheels have locking capabilities?"
Response: The stock cart is fitted with 2 rigid wheels in the front and 2 swiveling wheels in the rear. These wheels don't have locking capabilities, so we have already looked into purchasing new casters that will have brakes and also be able to lock the swiveling motion. This will ensure that our cart will be easy to maneuver and control.
(4/22/15 | In Person) - "Don't you think that the jack you chose with a 5000 lb load capacity seem excessive? From what I know, there is a locking mechanism in trailer jacks that work well under large loads. Because you are dealing with a much lighter load, the locking mechanism may not work as effectively. Your design probably will still work, but understand the parts you are selecting and what they were designed to handle."
Response: We understand that 5000 lb is much more than what we need, but we will definitely look into more jacks to see if there are jacks with lower load capacities. Our jack was only $65, so it's not a huge loss. If the $65 jack works, then great, but we can always find something else that can suit our needs better.
(4/22/15 | In Person) - "How much force is required to tilt the window using the pull bar on your design? Maybe you should incorporate some mechanical advantage into that motion."
Response: We have not quantified the exact force, so we will make sure to come up with an FBD of the entire assembly and figure out how much force is required to pull that bar.
(4/22/15 | In Person) - "The cart won't damage anything right?"
Response: We came up with the dimensions so that the arm would reach the window before the base of the cart could run into the heater along the wall. Regardless, we will look to fit some bumpers on the front of the cart as a precaution because we definitely don't want to damage anything.
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
No comments from others students have been made at this time.
Risks and Areas of Concern
Machining some of the parts will take a good amount of time, we should probably consult with Tom to determine the most efficient method
Resources or Information Required but not Available
N/A
Schedule
Begin fabricating prototype - Thursday
Order next set of parts - Friday
Budget (list amount spent and amount remaining)
Amount spent: $953.02
Amount remaining: $3546.98
Progress on Report and Webpage
The first draft of the report and webpage are being prepared for submission this Friday.