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Introducing RepRap 3D printer
 

Introducing RepRap 3D printer

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    Introducing RepRap 3D printer Introducing RepRap 3D printer Presentation Transcript

    • Sept 17, 2011, Hong Kong Open source 3D printer開放源設計的 3D 立體打印機 Prepared by: Parker Leung, College Teacher 梁志宏, 中學教師 (CAD電腦輔助設計科) MSc Enterprise Tech. & Mgt. (CityU, HK)
    • Rep Rap 複製 快速成形
    •  3D printer (Print REAL plastics parts) Can self-replicate parts (For repairing or build a new one)  Open source hardware (GNU general public license)  3D立體打印 (印製塑膠成品) 可自行複製自身的塑膠零件 (後備用途或製作新一台)  開放源設計 (GNU 通用公眾特許條款)
    •  Everyone can replicate RepRap their own  Cheaply distribute RepRap units to people and communities  Everyone can create complex products without industrial support  所有人都可以自行複製 RepRap  向社會大眾提供造價低廉的 RepRap 所有人都可以利用 RepRap 生產自己的創作,不用依賴工業作自家生產
    • Design your own 3D model 設計你自己的 3D 模形Extrude plastics by layers until print done Use toolchain convert 3D model into G code 續層擠出塑膠,直到打印完成 將 3D 模形轉成 G code Control X/Y/Z Platform and Extruder Send G code to control board 控制 X/Y/Z 移動工作台及擠膠噴頭 將 G code 傳送到控制板
    • Extruder + Hot NozzleZ - axis X - axis Heat bed Control board + Motor Driver Y - axis
    • FDM (Fused Deposition Modeling) / FFF (Fused Filament Fabrication) 熱溶解積層法 1. Thermoplastics filament are liquefied and deposited by an extrusion head 2. Follows a tool-path defined by the CAD file and materials deposited in layers in 0.3 mm 3. Part is built from the bottom up by layers 將熱塑性塑膠加熱液化,按計算好的刀路移 動,將塑膠擠出 (幼至 0.3mm),由最底層開 續層填滿
    •  “Support” printing are required if printing parts with hollow or invert slopes > 45° Need to remove “Support” manually after the print done 如果要打印的零件有凌空或倒斜 > 45° 的話, 則要打印額外的”支撐” 完成打印後,需要人手去移除額外的 ”支撐”
    •  Use heat bed to keep warm during printing to prevent object warp by cool down 為避免打印期間的冷縮引起的彎曲,過 程中建議使用電熱床保持相當的溫度
    • Darwin(March 2007) Mendel (October 2009)
    • Gen 3 Gen 6(Control board + Motor drivers) (Single board solution)
    • Arduino Mega RAMPS 1.2Homemade PCB
    • Blender Design your 3D model in any commercial CAD software (Inventor, Solidworks…) or any free 3D modeling software (Blender, OpenSCAD…) Save the 3D model as STL file format. OpenSCAD 先利用不同的3D建模軟件設計出自己的3D模型 將設計好的3D模型儲存成STL檔案格式
    • • Reading in 3D objects 讀取3D模型檔案 (STL)1 • Slicing the objects to make each build layer 將3D模型水平切割成多層平面2 • Evaluating 2D geometry outlines 計算出每層平面的外框刀路3 • Generating cross-hatch infill 計算出每層平面內的填充刀路45 • Arc compensation 計算所有走弧線刀路的補償刀路 • Translate the tool path to G code 將刀路結果轉譯成 G code 控制碼6
    • RepRap Host Skeinforge RepSnapper
    • RepRap Host Skeinforge
    •  Buy a complete set and assembly yourself, or Get printing parts from other RepRappers, and buy other mechanical parts and electronic parts from shop 於網上直接購買一台完整的套件,或 從 RepRap 的朋友處打印一份膠件,之後到五金 / 電子店鋪購買其他零件
    • ?Chocolate Printer / Laser Cutting PCB Maker / Think your own use Food Printer Machine Soldering Machine朱古力 / 食物打印 激光切割 電路板 + 焊接 你的創新用途?
    • Industrial Commercial Hobbyist Educational 工業用途 商業價值 業餘玩家 教學用途• 小型工廠可以 • 可代客少量生 • 玩具模型及首 • 印製出學生自用極低成本作 產獨一無二的 辦製作 己的設計,協試辦,亦可加 紀念品和禮物 • 可製作自己設 助他們發揮及快開發速度 計的零件 實踐創意
    • We can scan any objects and replicate by RepRap 透過立體掃瞄,我們可以將實物複製及生產David 3D Scanner David 立體掃瞄is a software can 是一個可以免費be download freely. 下載使用的軟件Hardware BOM: 配合硬件: Arduino  Arduino板 Motor Drive  電機驅動板 Stepper Motor  步進電機 Web Cam  視像鏡頭 Line Laser  Line Laser
    •  Teaching college student design and drawing 3D creations Students make use of RepRap to print out their design and use it in REAL life Currently redesign a simpler RepStrap which can be cheaper (< US$200) 於中學任教電腦輔助設計科,教授學生設計及繪製立體創作 學生利用 RepRap 打印出自己設計的作品,可以應用於現實世界 近來重新設計一台平價的 RepStrap,期望可推廣於其他中學使用 (< US$200)