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![Page 1: Rapid Assemblers: From Analog to Digital Additive Manufacturing Computational Synthesis Lab Hod Lipson, Jonathan Hiller Mechanical & Aerospace Engineering.](https://reader035.fdocuments.net/reader035/viewer/2022062518/56649f3d5503460f94c5cc0c/html5/thumbnails/1.jpg)
Rapid Assemblers:From Analog to Digital Additive
Manufacturing
ComputationalComputationalSynthesis LabSynthesis Lab
Hod Lipson, Jonathan HillerMechanical & Aerospace EngineeringComputing & Information ScienceCornell University
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Conclusions
• Digital Materials– Comprise lattice of physical voxels– High precision, work with incompatible materials – Tunable properties
• Rapid Assemblers– Assembles millions of prefabricated components into a
integrated active structure– Parallel (laser printer)– Serial (inkjet printer)
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Printable Robots
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Fab@home Model 1
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Fab@home Model 2
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With Max Lobovsky
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With Larry Bonassar, Daniel Cohen
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Zinc-air Batteries
Zinc-Air
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IPMC Actuators
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With Evan Malone
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Gershenfeld, 2005
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Digital Materials
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70010,00025,00080,000187,000363,0001,000,0004,500,000
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• Challenges• How to make voxels • How to assemble billions of voxels• How to simulate and design voxel-based systems
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Key Challenges
• How to fabricate voxels
• How to assemble billions of voxels
• How to simulate and design in voxel space
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Printing Digital Materials
Parallel Assembly
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Material Feeder
Build Chamber
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Fabricator
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With Jonathan Hiller
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Spheres
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3D Circuits
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3D Circuits
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Printing Digital Materials
Rapid Serial Assembly
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VoxJet
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Accelerated x4
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Voxels
Tunable Material Properties
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Tiles
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Modeling - COMSOL
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Simulating: Relaxation
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Tile Precision
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Dithering Materials
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Tuning Elastic modulus
Acrylic / Aluminum Dithering
0
500
1000
1500
2000
2500
3000
3500
4000
4500
0 0.2 0.4 0.6 0.8 1
% Aluminum
Ela
stic
mo
du
lus
(MP
a)
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Tuning CTE
CTE, Aluminum/Zirconium Tungstate
-1.00E-02
-5.00E-03
0.00E+00
5.00E-03
1.00E-02
1.50E-02
2.00E-02
25 30 35 40 45 50 55 60 65 70 75 80 85 90 95
Temperater (C)
Elo
ng
atio
n (
mm
)
100% Al
0% Al
15% Al
43%Al
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Auxetic Materials
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Spheres
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Precision
x 0.5 x 0.1
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Smart Voxels
Future Directions
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500 µm
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500µm
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Electrical conductivity
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3D Micro-fluidics
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Heterogeneous Tissue Engineering
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Gershenfeld, 2005
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From Analog to Digital
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Conclusions
• Digital Materials– Comprise lattice of physical voxels– High precision, work with incompatible materials – Tunable properties
• Rapid Assemblers– Assembles millions of prefabricated components into a integrated
active structure– Parallel (laser printer)– Serial (inkjet printer)
• New functionality– Desktop manufacturing of complex, 3D integrated active devices,
without special tooling
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Jeff I. Lipton
Daniel L. Cohen Evan Malone
Jonathan Hiller