156B Finals Week

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

• • Testing in air

    • Sampler easily dispensed and cutting and mesh bag mechanisms worked well with the steel cord and modular tubing

  • Testing in pool

    • Slight tipping of sampler near the bottom of the pool

      • Could possibly be due to misalignment of the three tubes attached to the sampler that were hose clamped together

    • When tubes are unwound, easy to pull steel cord through tubing

  • Fabricated two pulleys to wind the two cutting wire & mesh bag wires

Accomplishments from Previous Week

• • Completed first draft of poster (All)

  • Completed final draft of report (All)

  • Finalized and bought action camera, GoPro camera, and GoPro housing (David)

  • Sewed mesh bag together for final prototype (Bridget)

  • Joined brass woven material and interfaced it with the steel bars and cutting wires/mesh bag (Joseph)

  • Machined pulley and pulley housing for interfacing between top an bottom cutting and mesh bag wires, respectively (Joseph)

  • Assembled steel cord, tube, and quick connect dispensing component (Tanima)

  • Updated Dr.T and Pedro on prototype progress (David & Bridget)

  • Finalized project budget form (Tanima)

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

• • N/A

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

• • We set up our poster session with Chuck and Kara for Tuesday, June 7 at 3pm

    • They want to replace the three tubes attached to the sampler for stability with rope-like material with parachord

    • Chuck is unsure about the modular tubing and thinks we can simply have the steel chords

      • But doing so could lead to higher likelihood of actuating the cutting wire/mesh bag early

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

• • Wed 6/01:

    • We told Dr. T and Pedro our concern over the large friction in the PVC green clear tubing that was hindering the steel cord to go through

      • Their suggestion was to use Teflon tubing

        • Since we did not have the time to order it on McMaster and wait for it to finish our prototype, we went to Home Depot

        • Although Home Depot did not have it, we found 20' Vinyl tubing that we found worked well with our steel cord, so we bought that instead

    • Additionally, Dr.T suggested using quick connectors to connect individual smaller pieces of tubing to get variable lengths

      • We cut the Vinyl tubing into three 5', two 2', and one 1' pieces

      • We bought a few 1/2"x1/2" quick connect unions to connect these individual tube pieces

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

• • N/A

Risks and Areas of Concern

• • N/A

Resources or Information Required but not Available

• • N/A

Schedule

• • Ensure that prototype is reliable and works efficiently

  • Tues. 6/7 SPAWAR presentation with Chuck & Kara

Budget (list amount spent and amount remaining)

• • Budget: $2700

  • Spent: $800.30

  • Remaining: $1899.70

Progress on Report and Webpage

• • Report

    • Updated final prototype design components

    • Update report based on comments/corrections from team 7

  • Website

    • Updated instructions on use of prototype

    • Updated photo of final prototype design

    • Updated final design components

    • Updated budget form