how to 3d print... right now!
TRANSCRIPT
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Calling all Coders, Designers, Makers, Engineers, Hackers, and Thinkers.
Merging innovators from the fashion and tech industries, the result will be awesome!
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What is 3D Printing?
Subtractive
manufacturing
Additive
manufacturing
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Types of 3D Printing
Fused Deposition Modeling
(FDM)
Stereolithography
(SLA)
Selective Laser Sintering,
Selective Laser Melting
(SLS, SLM, DMLS)
PolyJet (PJ)
Reliable Smooth
Powder
Color
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Costs of 3D Printing
FDM
SLA
PJ
SLS, SLM, DMLS
High
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Types of 3D Printing
FDM
SLA
PJSLS,
SLM
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• Designing FDM parts for Strength
• Designing FDM parts for Fit
• Designing FDM parts for SPEED
What we’ll cover today:
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Designing for Strength
FDM print nozzle
Previously printed
layers
X
Y
Z
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X
Y
Z
WEAKER
STRONGER
Designing for Strength
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X
Y
Z
PULL
PULL
Von
Mises
Stress
Designing for Strength
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X
Y
Z
PULL
PULL
Principal Stress Vectors
Designing for Strength
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X
Y
Z
PULL
PULL Build Envelope
Designing for Strength
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WEAKER
STRONGER
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X
Y
Z
PULL
PULL
Designing for Strength
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1. Run a static simulation of
your model
2. View stress vectors
3. Print so that largest stress
doesn’t pull LAYERS apart
Designing for Strength: Workflow
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• Designing FDM parts for Strength
• Designing FDM parts for Fit
• Designing FDM parts for SPEED
What we’ll cover today:
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Designing for FIT
Do you:
A. Design the parts to FIT PERFECTLY together
(because printing tolerances are symmetric)
B. Design the parts with a GAP between them
(to be on the safe side)
C. Design the parts to OVERLAP
(because 3D parts shrink over time)
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Designing for FIT
The edge of your CAD model
The beads of FDM
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Designing for FIT
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Designing for FIT: Crowd participation!
Option 1:
NO Clearance,
NO Draft
Option 2: 0.010” gap
Option 3: 0.020” gap
Option 4: 0.030” gap
Option 4: 0.010” gap
+ sanding
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Designing for FIT
0.010”
(0.0254 cm)
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Designing for FIT
One bead
thickness gap
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Designing for FIT
Wall
0.010”
(0.0254 cm)
0.020” ?
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0.010”
thick0.020”
thick0.030”
thick0.040”
thick0.050”
thick
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Designing for FIT
One Bead:
Two Bead:
Squish! Z
XX = 2*Z
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• Designing FDM parts for Strength
• Designing FDM parts for Fit
• Designing FDM parts for SPEED
What we’ll cover today:
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OBZ Design sample partScreen
Nubs
Front
Back
Rubber Button
Designing for FIT
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0.003” Clearance for
paper
0.002” Clearance, to let screws have bite
5° of draft, 0.001” clearance5° of
draft,
0.005”
clearance
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• Designing FDM parts for Strength
• Designing FDM parts for Fit
• Designing FDM parts for SPEED
What we’ll cover today:
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Printing for SPEED
How long does this part take to print?
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Printing for SPEED
PrintingPrep the files Post-processing
1hr 54min
• Choosing color/thickness
• Laying out your tray
• Waiting in line
• Operator actually starts
your print!
• Removing from tray
• Removing support materials
• Sanding
• Painting
• Metal inserts
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Printing for SPEED
Bad 2: PrintingPrep Post
PrintingPrep PostBad 1:
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PrintingPrep Post
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PrintingPrep Post
8 hours 8 DAYS
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Painting FDM parts
1. Sanding
2. Primer
3. Paint
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PrintingPrep Post
8 hours 8 DAYS
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PrintingPrep Post
“On some parts, we go through 7, 8 iterations just trying to
get the shape right. Other teams have to try to modify off-
the-shelf parts. Not us- we can custom build for our exact
need!”-Daniel Hoyos Failach, Team Lead
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PrintingPrep Post
“That’s not ‘Rapid Prototyping’!”
-Daniel Hoyos Failach, Team Lead
8 hours2 WEEKS
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PrintingPrep Post
PrintingPrep Post
“Now we prep and
print ourselves, and
have the parts in the
morning!”
-Daniel Hoyos Failach,
Team Lead
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How crazy would it be if only one person in
a building could print Word documents?
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Prepare: Schedule:
CAD Input: FREE!
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Printing for SPEED
Bad 2: PrintingPrep Post
PrintingPrep PostBad 1:
Bad 3: PrintingPrep Post
Less Support, Less Sanding & Painting
Better Software, Prep part yourself!
Print in Sparse mode, lower density
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Bad 3: PrintingPrep Post
Printing for SPEED
Functional Parts
under high stress
Fit or feel
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Printing for SPEED
Bad 2: PrintingPrep Post
PrintingPrep PostBad 1:
Bad 3: PrintingPrep Post
EASIEST TO FIX!
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• Designing FDM parts for Strength
• Designing FDM parts for Fit
• Designing FDM parts for SPEED
What we’ll cover today:
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How to 3D print RIGHT NOW:
If you are a UML student:
One time print:
Makerspace on North Campus
Supervised use:
• Safety training
• Printing & laser cutting training (Mon. 5-7)
Unsupervised use:
• Show lab manager you deserve it
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How to 3D print RIGHT NOW:
If you are a UML student: • [email protected]
iHub members get access to
THIS makerspace
• Extra fee
If you are an inventor/start-up:
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How to 3D print RIGHT NOW:
If you are a UML student: • [email protected]
Join iHub!If you are an inventor/start-up:
If you already have a Stratasys
Printer:Download GrabCAD Print
for free today!
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Printing for Strength:
X
Y
Z
Your print is weakest:
WEAKER
STRONGER
PULLING YOUR
LAYERS APART
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Printing for Fit:
For gaps between
moving parts, leave:
(One Bead)
Make your smallest
walls at least:(Two Bead)
(Squish!)Z
X
And horizontially,
account for:
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Printing for SPEED:
PrintingPrep the files Post- processing
The easiest section to cut time in is:
PREPARATION!
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Design for Manufacturing
(DFM) says:
“Avoid flat-bottom holes. Make sure the
bottom angles of holes conform to
standard drill bits.”
3D Printing
says:
Either way is fine.
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“Only design parts that
can be made.”
Design what does
the job best.(Traditional GE Engine Mount Bracket) (Redesigned bracket by GrabCAD user Charlie
Pyott)
3D Printing
says:
Design for Manufacturing
(DFM) says:
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● 2 pieces
● Complex, better
fuel mixing built-in
● 10 days
3D Printing
says:
● 150 pieces
● Simple fuel mixing
● 6-9 months to
make
DMLS printed fuel injector nozzle for
NASA’s Marshall Space Flight Center
Design for Manufacturing
(DFM) says:
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Design for Additive
Manufacturing (DFAM)
Design for
Manufacturing (DFM)
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Optimizing for Speed
Actual
modelSupport
material
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Optimizing for Speed
Model material
Support material
Build Time
0.46 cubic inches
0.11 cubic inches
35 min
0.46 cubic inches
0.31 cubic inches
2h 18 min
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Optimizing for Speed: Tips
1. Minimize use of Model and Support
material
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Optimizing for Speed
Build Time 35 min2h 18 min
Minutes/Cubic Inch 61179
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Optimizing for Speed
Build Time 35 min2h 18 min
Minutes/Cubic Inch 61179
FEWMANY Material Changes
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Optimizing for Speed: Tips
1. Minimize use of Model and Support
material
2. Minimize times the printer
head has to CHANGE from
Model to Support material
3. TEST, TEST, TEST!
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Agenda
● Optimizing for strength
● Optimizing for speed of print
● Optimizing for humans
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What if only one person at your company could print
Word documents?
Optimizing for Humans
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Optimizing for Humans
CAD Designer/Engineer
CAD Designer/Engineer
CAD Designer/Engineer
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Optimizing for Humans
CAD Designer/Engineer
CAD Designer/Engineer
CAD Designer/Engineer
Printer
Operator
15th 16th 17th
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Optimizing for Humans
CAD Designer/Engineer
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Optimizing for Humans
Prepare: Share:
CAD input
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Optimizing for Humans
.STL
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Optimizing for Humans
Prepare: Share:
No STLs!
FREE!
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What if only one person at your company could print
Word documents?
Optimizing for Humans
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Optimizing for Humans
What if EVERYONE at your company could 3D print?
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Agenda
● Optimizing for strength
● Optimizing for speed of print
● Optimizing for humans
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Optimizing for Humans
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Which of these statements is true?
• 3D Printing is faster than
other manufacturing
methods.
• 3D Printing is cheaper than
other manufacturing
methods.
• 3D Printed parts are
stronger than those
made other ways.
• 3D Printing is more
efficient than other
manufacturing methods.
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Injection Molding:
CNC Machining:
3D Printed: