156B Week 6

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • Analysis Overview

    • We looked into material properties of aluminum and steel

    • Additionally more analysis was done into the centripetal brake

  • Design Overview

    • The design was refined and further fleshed out. Drawings were made for some parts of fabrication

  • Test Overview

    • Further testing is awaiting the prototype construction.

Accomplishments from Previous Week

• • More research was done into the specific mechanisms on the cart such as wheels, bearings, materials, and fabrication methods.

  • Met with Keith and rest of the main CAEP team and went over our next course of action for the cart

  • setting dates for final tests as well as design review

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • We would like to have all the engineering drawings finished and buttoned up for any of us to either purchase or manufacture the components when we have time.

  • Nail down a rough estimate and BOM for the finished cart

  • Finalize all of the off the shelf components that we are looking to include in our design

  • We would like to measure the rotational speed of the cart in the wash

    • may use arduino encased in temperature resistant material as our sensor. 

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • Notes from last week:

    • use extruded aluminum mesh

    • the cost of the current cart prototype is fine ($1500)

      • they are sill hoping to find ways to reduce this cost for after 156B project where they would go into production

    • Presenting week 7 to CAEP leadership

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

• • Notes from last week

    • talk to Tom about straightening out the basket

    • do not use galvanized steel

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• • suggested we use the card in the spoke trick 

    • this is a good idea since we could then hear the speed of the cart in the wash

Risks and Areas of Concern

• • The main area of concern is the centripetal brake

    • this would require some accurate calculations of our speeds in the washer with the finalized design

      • this is difficult since we do not have the final prototype with the pole diameters and securing hardware, thus finding the actual speed of the cart will be difficult

Resources or Information Required but not Available

• • Centripetal Brake calculations / knowledge

Schedule

• • Weekly meeting with sponsor to present our new cart design present testing results (03/1)

  • Begin machining parts for tier one of final cart prototype (02/21)

Budget (list amount spent and amount remaining)

• • Purchases made haven't been reimbursed yet:

    • Aluminum rods (IMS): $21 + $42.59 +$27.69

    • Small aluminum rod: $13.13

    • Galvanized cable: $5

    • Crimping tool for cable: $42.59

    • Wire baskets (2):$100

  • Amount Spent: $287.44

  • Remaining: $1712.56

Progress on Report and Webpage

• • Report is being updated with design changes and sponsor feedback

  • Rough draft to be ready by end of this week