156B Week 3

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

• • 1 Squiggle motor has been purchased

  • The design proposal presentation went well on Tuesday

  • An Action Plan is in the works (aka what we are going to do/what direction we are going)

  • More prototypes are being made

Accomplishments from Previous Week

• • Successful prototypes for flexures and serial motion (linear slides) were created

  • Our sponsors like the progress we have made

  • Theta stage concepts have been drawn.

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

• • Send flexure design DXF files to Wire EDM machine shop for manufacturing (Razi & Sean)

  • Update the website (Sean)

  • Dissect squiggle motors (Dylan & Julie)

  • Theta Stage Design/Prototypes (Everyone)

  • Squiggle motor application/mounting (James)

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

• • Pursue the option with the least cost

    • Flexures are hard to beat cost wise

  • The sensor is placed 0.28 mm away from the motor

  • Presentation

    • Change cost

    • Change lifetime of flexures - flexures might actually last longer

  • How to attach the motor? Use a clamp?

  • Do not mention the circuit board design in the presentation

  • Do not mention passing current through the flexures

  • Change theta to +/- 0.5 degrees and +/- 0.5 mm

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

• • Comments from Doctor Delson on our presentation:

    • Excellent early CAD and delivery

    • I did not understand L flexure design and parallel mechanism approach

      • are motors mounted to stationary base?

      • Is there sliding between squiggle motors?

    • What about material choice of flexure?

      • Discuss

*GET other notes from Julie?

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

• • Cost of Squiggle motors

  • Cost of serial motion design (linear slides)

  • Theta stage movement

Resources or Information Required but not Available

• • N/A

Schedule

• • Milestones:

    • Obtaining Squiggle motors and learning how to control them

    • Mounting/Implementing squiggle motors

    • Machining flexure design

    • Theta stage implementation

Budget (list amount spent and amount remaining)

• • See the Budget form in the reports section of the website

Progress on Report and Webpage

• • Progress reports are being updated every week

  • Website is undergoing construction