Andre FaroniRory Timar Josh Stroud
ME 102B Final Presentation:
Building a 3D Metal Printer
4/29
Overview
Design Process
What + WhyOvervie
wWrapup Q+A
Goal: explore printing metal parts
with weldingResult: Lots of trial and
error
Here’s what we learned…
Why a 3D Metal Printer?
Design Process
What + WhyOvervie
wWrapup Q+A
?
First Prototype Doesn’t Work
What + WhyOvervie
wWrapup Q+A
Design Process
Focus on learning about + prototyping TIG welding
circuitry
Tackle the
riskiest part first!
Iterating on Power Circuit
Car Ignition
Coil
Factory HV Caps
DIY Transformer to Spec
Flyback Transform
er
DIY Capacitor
Salvaged Transform
er
High Voltage Arc Ignition
What + WhyOvervie
wWrapup Q+A
Design Process
Iterating on Power CircuitHF Current
Control
`
Continuous Current Power Supply
HV Capacitor “Zap” Array
Jewelry Micro-Tig Welding
Insight!
What + WhyOvervie
wWrapup Q+A
Design Process
Beefier Microcontroller Powers Closed-Loop Control
What + WhyOvervie
wWrapup Q+A
Design Process
Arduino Uno16 MHz
ARM Cortex M-4168 MHz
HF Current Control
PI current control
Capacitor Charging
P voltage control
Misadventures in Startup Land
Free Ventures
What + WhyOvervie
wWrapup Q+A
Design Process
We want this!
Final Prototype
Overview
Wrapup Q+ADesign Process
What + Why
System Overview
What + WhyOvervie
wWrapup Q+A
Design Process
System Operation
Overview
Wrapup Q+ADesign Process
What + Why
1 2 3
System Operation
Design Process
Overview
Wrapup Q+AWhat +
Why
1 2 3
System Operation
Design Process
Overview
Wrapup Q+AWhat +
Why
2 31
Microcontroller Control
Design Process
Overview
Wrapup Q+AWhat +
Why
Experimental Data
Design Process
Overview
Wrapup Q+AWhat +
Why
Lessons Learned
• Know when to model, know when to build
• Invention = SMART trial and error.
Design Process
What + WhyOvervie
wQ+A
Wrapup
WrapupGoal: a 3D metal printer for the masses
Insight: Combine TIG welding practice with existing 3D printer tech
Final Result: an experimental platform to test + tune our welding process
Design Process
What + WhyOvervie
wWrapu
pQ+A
Biggest Lesson: Even when the work you set for yourself wasn’t finished, you’ve come too far to
say it’s worth coming back
Timeline in Janurary
Design Process
What + WhyOvervie
wWrapup Q+A
Image sources
Tig welder: http://cfnewsads.thomasnet.com/images/large/025/25335.jpg
Microtig welder: http://www.millerwelds.com/education/articles/images/Fig.-7-Micro-TIG1lr.jpg
Arduino: http://arduino.cc/en/pub/skins/arduinoWide_SSO/slider_home/h_01.jpg
ARM: http://d3dpuk1s8nsuve.cloudfront.net/wp-content/uploads/2012/05/STM32-F0-microcontroller-series.jpg
Thomas edison: http://2.bp.blogspot.com/--wbqi2ucw14/UhoodohiWiI/AAAAAAABxOk/KxVcgjYLeiY/s320/Entrepreneur%E2%80%99s+Curse.jpg
Misadventures in Startup Land
Free Ventures
What + WhyOvervie
wWrapup Q+A
Design Process
We want this!
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