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3D PRINTINGLou Amadio
Wahid Tanner
COVERING
•Why?• Hardware• Hopper & Binder• Cartesian & Extruder• Challenges• Software• Host• Firmware• Community
WHY• Fill Immediate needs
• Experimentation
• Teaching
• Sustainability
HARDWARE
Cartesian
Hopper
HOPPER PRINTERS
Hopper
SubstratePrintingObject
Substrate spreader
Binder
Elevation actuator
Elevator
BINDERS & HEADS• Sugar & Hot air ‘gun’
• CandyFab.org
•Dextrose, Water, Ink Jet
• Concrete, Water, Water gun
•Metal granules, Lasers
•Metal granules, Resin binder, with oven post processing
• UV curing resin, UV lamp
CARTESIAN
Elevator(z-axis)
Y axisX axis Print Head
SCREW EXTRUDER
Thermal transition
Heater Melt Chamber
Extrusion Orifice
Motor driven screw
Screw engages plastic
PULLEY EXTRUDER
Feed Rollers
Thermal transition
Heater Melt Chamber
Extrusion Orifice
REPRAP
•Replicating Rapid Prototyper
• Granddaddy of the DIY 3D Printer Revolution
• Printer that can print itself
• How do you build one if you don’t have one?
• RepStrapping - Boot strapping a RepRap
MATERIALS
• PETE
• Polyethylene terephthalate
• ABS
• Acrylonitrile butadiene styrene
• PLA
• Polylactic acid
•Derived from corn or potato starch
CHALLENGES
• Thermal Management
• Torque
• Position control
• Homing
• Firmware size
SOFTWARE
• Idea to Design• Sketchup, Art of illusion, Blender, Autocad•Design to GCode• Skeinforge,• GCode to Printer• Replicat.org• GCode interpreter• RepRap firmware
• Close your loops
• Eliminate overhangs
•Watch for thin areas
• Position large flat areas against elevator
DESIGN
Step 1 - design
Step 2 - Slice
Step 3 - Slice
Step 4 - ‘Minimize’ or simplify each slice
Step 5 - Inset outer ‘loop’
Step 6 - Fill Inner loop
FILLING
• Raft
• prevents warping
• provides a positive bond to elevator
• Top & bottom layers solid fill
•Middle layers
• Shell is created
• Fills are typically a honeycomb for stability
DEMO
COMMUNITY
•Open Source Hardware
• Commercial derived Hardware
•Open Source ‘Stuff ’
• Thingiverse.org
• ‘Crowd-sourcing’
• Caveat Emptor
CROWD SOURCING
OPEN SOURCE HARDWARE
•What’s really yours?
• How do you recoup expenses?
REFERENCES
• RepRap.org
•makerbot.com
• 8020.net
• thingiverse.com
• StoryofStuff.com