156B Week 8

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

• • Newest 9 coil Prototype Created and Tested (Works Well for 4 positions, still decouples at high speeds, doesn't reach 1500 RPM yet)

  • Tested ABS Dissolving method in which a coil was spooled on an ABS bobbin while being coated with gorilla glue and was then dissolved in acetone leaving only the coil

    • This method would shave off 1mm off of the total height of the coil, allowing us either 1mm off the height of the module or 1mm of extra coil for a stronger magnetic field

  • Finally got Hiperco 50 super alloy annealed

Accomplishments from Previous Week

• • Water Jet Cut new Magnetic Core plates out of 1018 Low-Carbon Steel

  • Had Bobbins Lathed out of Soft Magnetic Iron

  • Created New 9 Coil Prototype

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

• • Get Final Design 9 Coil Array Reamed, press fitted and wired - Nick, Edward

  • Get Final Designs of Housings 3D Printed and Ready to house the internal electronics- Siddarth

  • Get Electronics and Coils Wired Up - Jordan

  • Work on Final Report Draft 2 - Chris

  • Create Bluetooth Code for the Raspberry Pi Module - Siddarth, Edward

  • Get More Magnetic Cores Manufactured By CRMS - Nick

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

17 May 2017 - In Person

• • Bobbin flexing during spooling

    • Print on a Projet with stiffer material

    • Print thick bobbins with a break away material or sand down after spooling

  • Go with a symmetrical design

  • Battery powered module can be 8 mm thick

  • Any space in housing that doesn't have a component should be solid

    • Design channels through that solid space for cables

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

15 May 2017 - In Person

• • Report

    • Clarify language

      • Anneal, not heat treat

      • Differentiate Si & C alloys

    • Recommendation section

      • Document limitations of injection molding

      • ESD specs for static prevention

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

• • None

Risks and Areas of Concern

• • Concerned that we may not be able to get enough magnetic field using the 5V available on the Microcontroller boards

  • Battery Life - Should be enough to get 8 hours of life, if we can generate enough magnetic field with only 260mA. 

Resources or Information Required but not Available

• • None

Schedule

• • Preliminary Design Review due tomorrow

  • Have final design complete by end of next week

Budget (list amount spent and amount remaining)

• • Spent: $1434.82

  • Remaining: $3565.18

Progress on Report and Webpage

• • Updated Draft Submitted

  • Webpage as before