1. Eric Hettler - ME William Gallagher - ISE Christopher Mieney - ME Gregory Ryan - ME Joseph Cole - EE FAB AMERICA

2. Design Review Agenda Project Description System Architecture Final Design Specifications Project Status Summary of Test Results Going Forward Questions

3. Project Overview Fab@Home open-source architecture Modify an existing Fab@Home deposition system to mix materials and deposit layer by layer on print surface. A UV curable resin will be dyed to serve as a medium to demonstrate the printing of multiple materials. Interface with software http://fabathome.org

4. Key Engineering Specifications SpecificationDescription of MetricUnit of MeasureAcceptable ValueDesired Value Can Print MulticolorNumber of Base Colors#33 Can Print Viscous MaterialViscosity of resincP> 165> 300 XY Repeatability Mean/standard deviation of XY locations of deposited materials mmTBD Z RepeatabilityMean/standard deviation of layer thicknessesmmTBD Part Size (XYZ) Mean/standard deviation of Error length/length of desired part mm/mmTBD Printable areaMaximum printable areamm x mm> 50 x 50> 100 x 100 Minimum Feature SizeResolution in XY planemm< 0.10.0158 Minimum Feature SizeCombined Cured Droplet Diametermm< 0.5< 0.1 Color VariabilityUncombined Uncured Droplet VolumenL< 25< 10 Color VariabilityUncombined Uncured Droplet Volume PrecisionnLTBD Low CostTotal Budget$< 3,000 - Parts Curing TimeTime to cure a layer of epoxysec< 180< 60

5. Project Development MSD IIMSD I 12345 Phase 1: Development Engineering Specifications Concept Development Phase 2: Design Systems Level Detailed Design Phase 3: Design Confirmation Design Analysis Formulate BOM Phase 4: Fabrication Order Parts Fabricate Parts Phase 5: Testing Characterize Capabilities

6. Systems Overview

7. Final Design Concept

8. Budget Total cost must be below $3000 dollars. Preferred cost is below $1000 dollars to better align with the Fab@Home mindset Outcome:

9. System Testing Results Deposition similar to fountain pen. When multiple colors are printed in same layer, toothpaste like effect. Edges tend to run over. Thickness is relatively repeatable.

10. Project Status (Specs Met) SpecificationDescription of MetricResultAcceptable ValueDesired ValueSpec Met? Can Print MulticolorNumber of Base Colors333Yes Can Print Viscous MaterialViscosity of resin260cP> 165> 300Yes Z RepeatabilityMean of layer thicknesses.24mmTBD - Printable areaMaximum printable area230mmx150mm> 50 x 50> 100 x 100Yes Minimum Feature SizeResolution in XY planeTip Dependent< 0.10.0158- Minimum Feature SizeStream WidthTip Dependent--- Minimum Feature SizeCombined Cured Droplet Diameter N/A< 0.5< 0.1N/A Color VariabilityUncombined Uncured Droplet VolumeN/A< 25< 10N/A Color VariabilityUncombined Uncured Droplet Volume PrecisionN/ATBD N/A Low CostTotal Budget$707.58< 3,000 - Parts Yes Curing TimeTime to cure a layer of colored epoxy240 seconds< 180< 60No

11. Going Forward Further design on mixer/manifold Modification of Fab@Home Software More modular setup Modify paths More Robust Electronics Limit switches, wiring panels, motors, interfaces, etc. Closed Loop Z –axis positioning

12. Questions?