* Week 8

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

• • Spring steel component fully designed, waiting for parts

  • Hard stops undergoing redesign

  • Puck design and placement tolerances 90% known

  • Most parts ordered - hard stop steel and other small components left

Accomplishments from Previous Week

• • Ordered screws, taps, hex nuts, 301 full hard (HRC-42) steel for spring steel components

  • Finished design of actuator-cam linkage

  • Finished design of cam

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

• • Machine spring steel components (Alex, Tai)

  • Machine plate (Sean, Alex)

  • Machine pucks (Alex)

  • Machine cam (Mike)

  • Machine actuator-cam linkage (Sean, Steven)

  • Assemble airpot (Sean, Alex)

  • Machine cylinder heads to ship to airpot for professional assembly (Sean, Alex)

  • Finish editing report (Steven + rest of team)

  • Finish editing website (Steven + rest of team)

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

• • Ernest advises against requiring assembly instruction to adjust spring steel angle to influence tension

    • We already decided to have constant angle

  • Rethink anti-backlash component to put on each puck

    • We decided the concerns with space constraints in puck and sliding parts in general made this design not feasible

  • Consider Gates as timing belt provider

  • Puck hole location and diameter of hole need precise machining (analysis proves +/-0.005" tolerance on pocket is possible)

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

• • Feedback on spring steel tapered design (email Sunday 2-24)

    • Included deflection formula for large deflections

Comments from Tom and Isaiah

• • Isaiah: Consider smooth belt sliding on smooth puck surface which moves enough to rotate each puck 2 degrees past 90 deg position.

    • Would cause wear on belt and would likely require servicing

    • Too far along our current design to consider

    • Ernest said to leave it for someone next quarter

  • Tom: Gave suggestion of feasible spring steel design not requiring water jetting

    • Could be done without spring steel

    • Would not have taper

    • Would be easier and quicker to machine; easier to install

  • Tom: Gave design suggestions on cam

    • mounting bearings with spacer, threaded rod, nut

Risks and Areas of Concern

• • Spring steel component requires precise machining.  Tom is confident and willing to machine parts, but says it will be challenging.

  • Cam requires very small bearings--support on very slim axle?

Resources or Information Required but not Available

Schedule

• • Describe upcoming milestone

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • ~$1700 spent (awaiting confirmation of shipping/tax amounts)

    • $33.15 on acrylic for Proof of Concept presentation prototype (Delivered)

    • ~$742 Boca bearings (6/8 Delivered)

    • ~$140 OnlineMetals plate and rod stock (Delivered)

    • ~$45 McMaster on timing belts (Delivered)

    • ~$150 Airpot on pneumatic actuators

    • ~$70 StockDrive Products on Pulley stock

    • ~$200 AST on small bearings

    • ~$150 McMaster on screws, spring steel, dowel pins, retaining rings

    • ~$150 Misumi on ultra low-head screws

• Remainder: $1820

Progress on Report and Webpage

• • Report halfway through writing/formatting edits; analysis, figures, appendix edits pending

  • Webpage pending further edits