156A Week 10

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

• • Mechanical advantage ideas are being compiled

  • Bearing solutions are in the process of being compiled

  • CAD models are in the works for various configurations

Accomplishments from Previous Week

• • Met with Delta Design (again)

  • Met with the professor

  • Basic CAD models produced

  • Learned more information on the squiggle motor itself

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

• • PUT TOGETHER PRESENTATION (whole team)

  • Mechanical advantage ideas (Razi & James)

  • Bearing solutions (Sean & Dylan & Julie)

  • Paperwork finalized (Julie)

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

• • Monday (3/11), In person with Keith Emery and Jim Babcock, at Delta Design

    • Logistics

      • agreed to skip meeting finals week and spring break

      • need to password protect website

      • Delta would like for us to send the final presentation to them to look over first

      • Jim is taking care of the budget form

      • Keith sent out a solidworks email to the team with squiggle motor and stage CAD

    • Design Concepting

      • Delta will check the 50 lb force requirement for the device and see if that is still a realistic design consideration

      • flexures will be an option for moving the stages around.  The team discussed and looked at another flexure design that Delta has patented.

      • flexures are useful in overcoming friction, setting a home position

      • Keith and Jim will check on the desired force output from the mechanical advantage

      • Jim verified that the shaft through the motor spins as it is translated by the motor.  This will play into or potentially limit our design for mechanical advantage

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

• • Tuesday (3/12) in person with Professor Delson at UCSD

  •    Finals Week Presentation

  • Progress - form online - emailed by Thursday

  • Webpage due next week

  • Budget form - contact

  • Risk reduction

    • CAD models

    • bearing solutions

    • Mechanical advantage

      • pros vs. cons

      • overview of ball grid array

      • multiple concepts

      • flexures ±1 mm? should work

  • Ask Tom about EDM machine shop

  • Block and Tackle 

  • Lever Arm

  • Gear-backlash

  • friction drive

  • flexure + mechanical advantage

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

• • 50 lb of force: is this realistic, overstated, or understated?

  • Configuring spacing and wall thickness with the motors and mechanical advantage

Resources or Information Required but not Available

• • Inquiry about wire EDM machining on campus; can we use this method to make flexures?

Schedule

• • Final presentation next Tuesday: the group will need to come together and pick out the best ideas for mechanical advantage.  We will then need to see if these ideas can be shrunk down and fit in to the 52 square mm space that Delta requires

  • Updated Gantt chart.

Budget (list amount spent and amount remaining)

• • Budget was set by Jim at $3500

Progress on Report and Webpage

• • Weekly sections have been updated, inquiry about password protection sent to Isaiah, team contact information updated and accurate.