156B Week 8

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

• • Testing modules, iterating on print designs (HTPLA), fabricating other platforms

Accomplishments from Previous Week

• • Laser cut control board mounts + finished control board (Seb)

  • PLA design iteration warranted the purchase of HTPLA (Seb)

  • Test peristaltic pump (Alec)

  • Update Electrical schematic (Alec)

  • Started compiling arduino code into one microcontroller (Alec, Phil)

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

• • Connect all logic and power electronics to control board (ALL)

  • Set up manual override control panel (Alec)

  • Optimize HTPLA design for brewing module modularity (Seb)

  • Design and fabricate inclined platform + mount kettle, valve, and pump (Phil)

  • Finish Arduino code with manual override option (Alec, Phil)

  • Have functioning user interface with simple “start” and “stop” options (Alec, Phil)

  • Design gasket to seal 3d printed nalgene cap (Alec)

  • Update Flow diagram (Seb)

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

All comments made over the phone on 2/21/19

• • Test peristaltic pump

  • Draw out process flow diagram of cleaning cycle

  • Set goals for last few weeks of quarter

  • Decide what stretch goals - if any - are attainable

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

All comments made in person on 2/18/19

• • Valves sealing issue

    • Try reverse polarity to see if it fixes sealing problem

    • Look into ordering new valves, you may have actually gotten “cheap” ones

  • Thermocouple grounding issue

    • Use an RTD specifically designed for immersion in water to fix issue

  • Work on team website more, the home page should be a clean summary

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

• • Cleaning cycle may require a third liquid reservoir

  • HTPLA may not perform better than standard PLA

  • User interface programming can become VERY time consuming

Resources or Information Required but not Available

• • Arduino coding best practices, especially for parallel operations

Schedule

• • Wk6: made a cup of coffee

  • Wk7: report + validation of components (ex.: grinds ramp, custom QD)

  • Wk8: control board + arduino code + mounting platforms

  • Wk9: HTPLA + front panel + finish assembly + bells and whistles

  • Wk10: bells and whistles + last minute changes

Budget (list amount spent and amount remaining)

• • Spent: $416.85

  • Remaining: $3,083.15

Progress on Report and Webpage

• • Report

    • 65%

  • Website

    • "Team" page done

    • "Home" page done/improving