156B Week 4

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

• • Machined jig inserts for current jig

    • Simplifying process by using current jig that clamps to micrometer setup

  • Performing bone sample testing tonight with jig inserts

    • Attempting to test effectiveness of inserts; Are samples dimensionally consistent? Is the process more efficient and less time consuming?

  • Desiccator design may need to be readjusted

    • Acrylic may not be suitable for .9 MPa vacuum pressure

    • 3-point intersection of dessicator components at corners may not provide a good seal

Accomplishments from Previous Week

• • Machined jig inserts for current jig

    • Simplifying process by using current jig that clamps to micrometer setup

  • Desiccator components have been cut

    • LaserCamm utilized to cut components for 1st compartment prototype

    • May assemble (not sure if acrylic is a viable option still)

  • Spoke to Tom Chalfant and Ian

    • Showed us a metal cylinder vacuum compartment we could potentially use for dessicator

    • Contemplating creating a base for current dessicators in order to provide stability

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

• • Continue to work on jig inserts  (Ivan & Chris)

  • Continue to test samples (if pig bone is available) (Brandon & Salem)

  • Speak more in depth with Ian & Tom about dessicator design (Team)

  • Assemble Current Dessicator Prototype (may still be beneficial to test) (Chris)

  • Adjust Gantt Chart (Salem)

  • Research Applicable Standards for our Project (Team)

  • Designate Slides for Proof of Concept Presentation (Team)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (4-15-16; In-Person)

• • Still waiting for verification that more bone can be ordered for testing

    • Looking into materials with similar elastic modulus as bone for testing

  • Like the idea of potentially using a positioning system on the outside of the diamond saw system with an arm that extends toward the diamond saw, holding the jig/bone sample

    • Would need to consider force of saw feed, potential deflection (Can provide us with a book containing this info)

Instructor Comments from Last Meeting and Actions Taken to Address these Comments (4-14-15; In-Person)

• • Professors were concerned about the vibrations in the jig affecting the grip of the Slide Panel. As a result a T-Slot was suggested and incorporated it in the Slide Panel design.

  • Feedback from last presentation is being taken into account for upcoming Proof of Concept presentation.  

Risks and Areas of Concern

• • Constructing a design that can maintain vacuum in the desiccator and has fewest penetrations in the acrylic

  • Visibility of samples with transparent material

  • How to assure prevention of damaging samples within dessicator

Resources or Information Required but not Available

• • N/A

Schedule

• • Rethink Dessicator Design

  • Continue Sample Testing

Budget

• • Amount spent: $37.05

  • Amount remaining: $962.95

Progress on Report and Webpage

Report

• • Continual Revisions of current sections

Website

• • Uploaded CAD files of current jig design

  • Budget Sheet updated

• Gantt Chart transferred (still needs updating)