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