Week 10

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

• • Design

    • Design of unit is finished

  • Fabrication

    • Fabrication of structure finished last week

    • Attached the brackets to the base of the structure

  • Tests

    • Code seems to work when motors are not connected

    • Problem with power source

Accomplishments from Previous Week

• • Finished structure

  • Finished creating mattress

  • Cured three different skin layers

    • Rebound 25 (pink)

    • Oomoo 30 (lavender)

    • Dragonskin (peach)

  • Able to move motors with 12V 3A power source

  • Force sensing resistor works

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

• • Tie up loose ends

    • Interface

      • Buttons (Daniel)

      • LCD screen (Johnson, Daniel)

    • Motion of motors (Johnson)

    • Heaters (Stephanie, Allen)

    • Power source (Daniel)

  • Website (Allen)

  • Report (Johnson, Daniel, Allen, Stephanie)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments

• • Get mechanics working for prototype, if we have time, we could find a way to reduce noise

    • Working on motors and heater

  • Make the presentation with the intention  that a few of the people will know nothing of the project

    • Used some of our earlier material from presentations

  • Want to also have the device be a warmer with no mechanical response

    • Incorporating a switch such that no mechanical response takes place

  • Any sharp edges is not good

    • Filleted all the top edges

  • Rather have mattress fully sealed

    • Made skin layer larger to encompass other layers

  • Test Rebound on sharp corner

    • Rebound performs fine

Instructor Comments from Last Meeting and Actions Taken to Address these Comments

• • Delrin is better than acrylic

    • Found it was expensive

    • Will look into further for report

  • If need more money for quality, ask sponsor

    • Told sponsor, and he agreed on an additional 100 dollars

    • Purchased a bigger power supply

  • Nice to see in poster the different pieces we made

    • Took a picture of our different samples

      • Placed in poster

      • Placed in presentation

Risks and Areas of Concern

• • Air bubbles within mattress

  • Acrylic pieces that hold nuts might not be a long term solution

  • Motor drivers are overheating

  • Bigger power supply might not work

    • Might need to splice multiple 3A power supplies instead

Resources or Information Required but not Available

• • None at this moment

Schedule

• • Describe upcoming milestone

    • Have mattress working

    • Have motors working

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • Memory Foam Pad - $10.78

  • Oomoo - $21.89

  • Remaining Budget = $389.28 - 32.67 = $356.61

Progress on Report and Webpage

• • Report

    • Added to the Appendix

  • Webpage

    • Added Week 10 Report