Introduction to 3D-Printing

Introduction to 3D-Printing

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  Introduction to 3D-Printing By:Yeo Kheng Meng ([email protected])Friday Huddle at NUS Enterprise (4 Sept 2015) 1
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  Lets start printingto get things going
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  About me • NUSComputer Science Class of 2015 • Currently working in Algo Access 11 July 2015
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  So what is? • Med-tech startup aimed at optometrists 1. Information retrieval from optical machines 2. Provide clinical assistance to aid diagnosis
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  5 How things work? OD,OS, CYL… OD, OS, CYL…
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  So why doesAlgoaccess need a 3D Printer? • Casing for our hardware product • >$10K for a mould • Still iterating Hardware Design
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  So what is3D Printing? • An additive manufacturing process that turns a 3D-design into a real object • Object is usually built layer by layer
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  Additive (Recent) Reductive(Traditional) GIF 3D-Printing CNC router Speed Slower (Hours) Faster (Minutes) Machine Cost Lower (~4 figures) Higher (~5 figures) Waste None Very wasteful. Requires post-cleanup Typ Build Size Smaller (~ 20x20x20cm) Larger (~ 1m x 1m x 1m) Additive vs Reductive Additive: http://www.geek.com/science/3d-printing-gifs-clearly-demonstrate-the-future-of-manufacturing-1587928/#gallery=0/wooden-yoda Reductive: http://giphy.com/gifs/london-3d-printing-3dps-AJvMW3HmcIPq8 Reliability Lower Higher
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  Types of Additive/3DPrinting • Fused deposition modelling (FDM) • Most common • Extrusion-based • Melt plastic and deposit on a platform • Stereolithography (SLA) • Shine UV light into photo-sensitive resin to solidify it • Selective Laser Sintering (SLS) • Powder-based • Use laser to melt and solidify metal/ceramic/plastic powders SLA: https://makeagif.com/SH74Kk SLS: http://makeagif.com/CPJTEl Stereolithography Selective Laser Sintering
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  Common FDM Materials Usuallycomes in spool form 1.75mm/3mm/2.85mm diameter PLA (Polylactic acid) ABS (Acrylonitrile butadiene styrene) Source Lactic acid (Plant products) Crude Oil Biodegradable Yes No Melting temperature 180 – 220 C 230C Glass transition temperature (rubber) 60 – 65 C 105 C Heated bed/platform Not required but good to have Must have Safety (Release of fine particles) Not required but recommended to have filters Should use filters or print in well- ventilated area • Exotics: Ninjaflex, t-glass, wood-based, conductive
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  From design toactual object (Live Demo) Design Object Slice Object (Slicer) Print Object STL file Gcode file via SD card or USB • Chop design into layers • Define print quality 123D Design Fusion 360 Designspark Mechanical Solidworks Sketchup … Cura Repetier Host Simplify3D … Ultimaker 2 Printrbot MakerBot Pirate3D … Software used Use your imagination Watch your imagination come to “life”
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  Quality (layer-height difference) Layerheight: 0.06mm 0.1mm 0.2mm Approx print time: 30mins 18mins 9mins
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  Drawbacks of 3D-Printing (comparedto injection-mould) • May be too slow for some use cases • Not scalable • Poor finish • Requires additional touch-up • Not strong • Weak between layers
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  Music by 3DPrinter Singapore National Anthem by Ultimaker 2 https://www.youtube.com/watch?v=4op7vfobDcA Singapore National Anthem by Printrbot Simple Metal https://www.youtube.com/watch?v=PI1DXdU53Ps Still Alive (Portal) by Printrbot Simple Metal https://www.youtube.com/watch?v=rh3QHoTB2Ts Fringe by Printrbot Simple Metal https://www.youtube.com/watch?v=en3cRWAqXwg