156B Week 7

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

• • There are some design modifications that need to be implemented by the request of sponsor

    • Microscope head must be 64 um from sample to take proper measurements

    • Current design has no clearance for micro

  • We stopped machining parts due to needed change in the design of the clamps/blocks

    • Grips must be changed, so stationary and moving blocks must be redesigned

Accomplishments from Previous Week

• • Motor mount block was machined and it is ready to be used 

  • GUI options explored

    • Microsoft Visual Studio 2015 (Formerly Visual Basic) will be used for serial communications with Arduino

      • Sponsor only needs Arduino libraries/code, and appropriate Microsoft .NET Framework

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

• • Finalize and confirm the new design - all

  • Finalize the CAD model - Nathan

  • Machine the new blocks/parts to be ready for CNC - Javad

    • Stationary block, moving block, and grips

  • CNC the moving/stationary blocks - Clint

  • Continue with interface/GUI research - Andrew

    • Confirm serial communication with Arduino, and obtain potentiometer feedback in Visual Basic Form.

  • Start researching and implementing the analog low-pass filter - all

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

• Meeting over Skype with sponsor on 5/4, no comments

• Email from sponsor's colleague in Taiwan regarding load frame model and spectrometer fit (5/9)

  • Microscope head (10mm diameter) needs to be 64 um from sample

  • Current 10mm grip gauge is too small

    • Either expand minimum grip gauge or redesign grips to allow for lens clearance

    • Can expand grip gauge to 22mm while maintaining 2mm overall strain without overextending potentiometer

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

• • Make a Low-pass filter according to diagram on website

  • Report Feedback

    • Page numbers, final date

    • In abstract: why do they want to characterize electrical properties

    • Photo of SEMtester

    • Background on website is better than background on report

    • FRs before deliverables

    • Exploded view of design

    • Show data for performance results (take 1000 steps

    • DS = Double Stack

    • Brief paragraph about linear actuator (whats it for, what will it do, etc)

    • For individual components, add pictures of chosen components in sections, reference others in appendix

    • electrically insulated grips

    • Theoretical predictions - ergonomics, etc.

    • Include software in component analysis section

    • Executive Summary in 3rd person

  • Don't need computational power of MATLAB or LabVIEW, can just use Visual C, or Processing

  • Use delrin insert instead of bearing with larger clearance hole - added slots on one side of block to accommodate some lateral motion 

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

• • Clamps/blocks need to be redesigned to accommodate for the distance of sample to lens (requested by Taiwan lab)

  • Method of verification (potentiometer) needs a high-precision device to calibrate.

    • +/-1.5% nonlinearity may impact precise measurements even after calibration

  • Slightly behind on the GUI/Interface part of the project

Resources or Information Required but not Available

• • N/A

Schedule

• • Describe upcoming milestone

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • $641.49 spent

  • $858.51 remaining

Progress on Report and Webpage

• • Corrections to the first draft of the report will be implemented this week

  • Website will be updated with new graphics/details once the CAD model is finalized