156B Week 5

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

• • Theta stage prototype made

  • Squiggle motors are being dissected

    • (We have two squiggle motors)

  • Bearings were ordered for a potential theta stage (should be here any day)

  • First Draft of Report is being worked on

Accomplishments from Previous Week

• • Ordered more position sensors (for free)

  • First Draft of the report is being worked on

  • Squiggle motors are being dissected

  • Tom should be finished with our machined prototype this week

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

• • Finish first draft of the report (Everyone)

  • Figure out how to mount the squiggle motors (Dylan)

  • Incorporate sensors into design (Razi)

  • Ideas for other possible theta stages (James)

  • Incorporate theta stage with X and Y stage (Razi/Julie)

  • Update sponsors, update website, continue working on the report (Sean)

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

• • Individual motors (AMS)

    • Get spare, broken motors for free

  • Stamping flexure design

    • Molds and forms = long lead time

    • Send CAD to Keith for 3D printing

  • Make our own circuit board

    • Talk to Keith about this

    • Send Jim an email for a link

    • Free programs

    • Circuit board material is about 1/16 inch

    • Remind Keith to bring samples for next meeting

    • Solder bends onto the boards

    • See if chip (sensor) is available by itself

  • BGA tolerance? Depends on pogo pins

    • If you are off by a micron, it doesn't matter

    • 5 microns is not a big problem

  • Purchase bearings for theta stage

  • Projected cost?

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

• • 1st draft of report due next week

  • New squiggle motor ($556)

    • Get motor sensor and magnet (AMS) + broken parts for testing

    • Use their program

  • Machining flexure - leaf springs from shim stock

  • Spring

  • Sheet metal

    • Look at the sheet metal tool in Solidworks

    • Circuitry at the bottom

      • Simulate with 3D printing or acrylic

      • Figure out the minimum radius of curvature

    • Flexible leads

      • Contact Steve Roberts

    • Goals

      • Get broke motors

      • Look into finding a microscope to work under (USB)

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

• • Things our peers liked in the presentation:

    • our prototypes

    • they thought we did a much better job with our problem description

    • they enjoyed/appreciated the comparison tables

  • Questions our peers had:

    • What does 22 million cycles convert into (# of days)?

    • Is there a requirement on how many motors we can use?

  • Suggestions our peers had:

    • The use of flexures is a good idea.

    • Using a pivot bearing for the theta stage

*Important to note: Some of our peers liked the serial concept with the linear slides but as a group we feel we can no longer go in that direction.

Risks and Areas of Concern

• • Mounting Squiggle motors

  • Placement of sensors

  • Integrating the current X/Y stage with the new theta stage

Resources or Information Required but not Available

• • N/A

Schedule

• • Milestones:

    • Integrating the current X/Y stage with the theta stage

    • Finish the first draft of the report

  • Get a moving part by next week

Budget (list amount spent and amount remaining)

• • See Budget section of the website for an up-to-date Budget list

Progress on Report and Webpage

• • Progress reports are being updated

  • Website is being updated

  • 1st draft of the report is being worked on