Transcript P10551 - Nano-ink Deposition System Week 2 Update

FAB AMERICA
Eric Hettler - ME
William Gallagher - ISE
Christopher Mieney - ME
Gregory Ryan - ME
Joseph Cole - EE
Design Review Agenda
 Project Description
 System Architecture
 Final Design Specifications
 Project Status
 Summary of Test Results
 Going Forward
 Questions
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
Key Engineering Specifications
Specification
Description of Metric
Unit of Measure
Acceptable Value
Desired Value
Can Print Multicolor
Number of Base Colors
#
3
3
Can Print Viscous Material
Viscosity of resin
cP
> 165
> 300
XY Repeatability
Mean/standard deviation of XY locations of deposited
materials
mm
TBD
TBD
Z Repeatability
Mean/standard deviation of layer thicknesses
mm
TBD
TBD
Part Size (XYZ)
Mean/standard deviation of Error length/length of
desired part
mm/mm
TBD
TBD
Printable area
Maximum printable area
mm x mm
> 50 x 50
> 100 x 100
Minimum Feature Size
Resolution in XY plane
mm
< 0.1
0.0158
Minimum Feature Size
Combined Cured Droplet Diameter
mm
< 0.5
< 0.1
Color Variability
Uncombined Uncured Droplet Volume
nL
< 25
< 10
Color Variability
Uncombined Uncured Droplet Volume Precision
nL
TBD
TBD
Low Cost
Total Budget
$
< 3,000 - Parts
< 3,000 - Parts
Curing Time
Time to cure a layer of epoxy
sec
< 180
< 60
Project Development
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
1
2
MSD I
3
4
5
MSD II
Systems Overview
3D Printer
Curing
Light Source
Motion Control
Computer
Software
Commands
Z Motor
Lead
Screw
XY Motors
Lead
Screws
Controller
Material Delivery Carriage
Controller
Micro Valves
Material
Deposition
Platform
Uncured
Part
Cured
Part
Final Design Concept
Budget
 Total cost must be below $3000 dollars.
 Preferred cost is below $1000 dollars to better align
with the Fab@Home mindset
 Outcome:
Category
Material and Color
Delivery
Curing
Electronics
Total
Cost
$638.19
$55.68
$13.71
$707.58
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.
Project Status (Specs Met)
Specification
Description of Metric
Result
Acceptable Value Desired Value
Can Print Multicolor
Number of Base Colors
3
3
3
Yes
Can Print Viscous Material
Viscosity of resin
260cP
> 165
> 300
Yes
Z Repeatability
Mean of layer thicknesses
.24mm
TBD
TBD
-
Printable area
Maximum printable area
230mmx150mm
> 50 x 50
> 100 x 100
Yes
Minimum Feature Size
Resolution in XY plane
Tip Dependent
< 0.1
0.0158
-
Minimum Feature Size
Stream Width
Tip Dependent
-
-
-
Minimum Feature Size
Combined Cured Droplet Diameter
N/A
< 0.5
< 0.1
N/A
Color Variability
Uncombined Uncured Droplet Volume
N/A
< 25
< 10
N/A
Color Variability
Uncombined Uncured Droplet Volume Precision
N/A
TBD
TBD
N/A
Low Cost
Total Budget
$707.58
Curing Time
Time to cure a layer of colored epoxy
240 seconds
< 3,000 - Parts < 3,000 - Parts
< 180
< 60
Spec Met?
Yes
No
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
Questions?