156B Week 7

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

• • Design of rig structure finalized; Waiting on 80/20 and PVC components to all come in

  • Biteplate design progressed to a nearly completed state

    • Springs sourced

    • Hall effect sensor ordered

Accomplishments from Previous Week

• • 80/20 bars picked up

    • Hardware from McMaster arrived

    • Connectors and Brackets on the way (arriving Thursday)

  • Got a quote for bite plate

    • Much out of our price range, looking for alternatives

      • Potentially machining ourselves (consulting Ian)

      • Polyethylene instead of metal

      • Potentially a 3 part component for increased manufacturability

  • Updated CAD

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

• • Assemble Rig (everyone)

  • Source springs for paddle (Aryo)

  • Talk to Ian/Tom about machining ourselves (Nicole)

    • Use polyethylene

  • Make CAD modifications to biteplate if necessary (Julia)

  • Investigate velcro possibility for neoprene and poly on portions of biteplate (Tristan)

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

• • Plastidipping ends of 80/20 sounds okay

  • Tentative 2/29 site visit

  • Marine grade velcro plausible

    • Sponsor will pick up some from West Marine

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

• • No need for inserts to hold springs

    • Modified CAD accordingly

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

• • Biteplate   

    • Got quote from machine shop: $1888 for aluminum, $2951 for SS

    • Unreasonable for what it is, looking into alternatives to make it ourselves

      • Considering polyethylene instead of metal

      • Possibility of multi-piece part for ease of machining

Resources or Information Required but not Available

• • Waiting on purchased components to come in in order to assemble rig

  • Deflection values of paddles currently in use

Schedule

• • Receiving remaining 80/20 pieces from F&L (2/22)

  • Rig assembled (2/24-2/27)

  • Input from Tom or Ian on possibility of help with machining biteplate (by 2/23)

Budget (list amount spent and amount remaining)

• • $890.08 spent

  • $109.92 remaining

Note: $1000 budget not strict.

Progress on Report and Webpage

• • Rewriting bulk of first draft, taking into account instructor comments