156B Week 7

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

• • Force Test Fixture

    • Finalizing the mount variations for different SLK heads

    • Base Plate

      • Design and Analysis - work in progress

• DUT

  • Adapter being altered 

  • Temperature Controller 

Accomplishments from Previous Week

• Found Temperature Controller that Team 2 was using

  • Would work for a Pt-100 RTD

  • Clarified essential questions and concerns with sponsor

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

• • Sam

    • Cartridge Heater Mounting - Heat Sink Compound

    • RTD Mounting - RTV

    • Look into PLCs vs Temperature Controllers

      • Thermal switches vs relays in controllers

  • Damon

    • Creating new design iteration for DUT mount

    • Look into possible rectangular type RTD's that would work with our requirements

  • Daniel

    • Improve DUT Mounts with newer iterations

  • Looking into cylindrical type RTD's

  • Richard

    • Finalize 3 force adapter designs

      • Ready to be sent out for fabrication if needed

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

• Don't custom make captive screws (Cost)

  • Look for off the shelf ones

• Standard Factor of Safety should be at least 3

  • For the threads of standoffs on baseplate

    • M8 threads

• CAD Models should be kept nominal in assembly

  • The part drawings should include the tolerances

• DUT

  • x16 head gives 28 lb.

  • x1 and x2 heads give 87 lb.

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

• • Perform heat analysis for DUT

    • Show that if the heater is positioned higher that there will be hotspots, and if the heater is positioned lower, the time taken to heat will be too long

• Look into ANSI Fits

  • For Tolerances for different pins and screws

• Research design guidelines for Heaters and RTDs in regards to thermal expansion

  • The hole in which the components sit will expand under heating; will this effect the RTV or thermal grease by creating air gaps when thermally expanded?

• Thermal expansion from heater block to ultem adapter

• Record the thermal non uniformity by a number of degrees

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

• • N/A (No presentation this week)

Risks and Areas of Concern

• • DUT

    • Safety Risk

      • Thermal Fuse

    • Ensure mounting doesn't conduct heat generated from DUT

      • Don't let the SLK head heat up from generated heat

Resources or Information Required but not Available

• • N/A

Schedule

• • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • N/A

Progress on Report and Webpage

• • Updating Webpages

  • Drafting Report