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3D Printing Workshop


Hong Kong Open Source Conference 2014 …

Hong Kong Open Source Conference 2014
3D Printing Workshop

A brief talk about TinyBoy, a 3D printing used in High School Education

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  • 1. TinyBoy Dissection ! ! by: Wan Leung Wong FOSSASIA 2014 3D Printing Workshop
  • 2. Everything is started from RepRap From the Beginning 2
  • 3. RepRap 
 short for “Replicating Rapid-prototyper“
  • 4. RepRap was founded in 2005 by
 Dr. Adrian Bowyer
 Senior Lecturer in mechanical engineering at the University of Bath (UK)

  • 5. ▪ 3D printer (Print REAL plastics parts) ▪ Can self-replicate parts (For repairing or build a new one) ▪ Open source hardware (GNU general public license) ! What is RepRap? 

  • 6. ▪ Everyone can replicate RepRap their own ▪ Cheaply distribute RepRap units to people and communities ▪ Everyone can create complex products without industrial support RepRap’s Goal
  • 7. RepRap X/Y/Z moving platform Filament extruder 
 Hot nozzle Control boards + Motor driver Heat bed RepRap’s hardware structure
  • 8. RepRap’s hardware structure X - axis Y - axis Z - axis Control board
 + Motor Driver Extruder + Hot Nozzle Heat bed
  • 9. ▪ Use for teaching, on teaching Design and Creativity Why Tiny Boy? 9
  • 10. 10
  • 11. RepRap 2.5 Generation
  • 12. ▪ It’s Too Large!!! Why TinyBoy? 13
  • 13. 14
  • 14. ▪A class has 35 students ▪Only 2 hours for the design class ▪1 3D model has to use at least 1 hour to print ▪Students will be easy to lost interest on modelling design if they can’t get their product in a reasonable time. Why TinyBoy? 15
  • 15. ▪So, Parker Leung, a high school teacher, started this project in 2012. Why TinyBoy? 16
  • 16. TINYBOY

  • 17. TINYBOY SPEC • Size: 15 cm x 15cm x 22cm ! • printing size: 8.5cm x 8.5cm x 8.5cm ! • 1.75mm filament / 0.4mm hotend ! • same as RepRap ! • will be Open Source after fine tuning.
  • 18. ▪Quality of the product is not important on learning ▪The most Important is everyone could have one ▪Then people can learn by themselves. Why TinyBoy? 21
  • 19. ▪ Smaller 23
  • 21. Cheaper and Faster in Production 25
  • 24. Design your own 3D model Use toolchain convert 3D model into G code Send G code to control board Control X/ Y/Z Platform and Extrude Extrude plastics by layers until print done How 3D printing works?
  • 25. ▪ 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. Design your own 3D model Blender OpenSCAD
  • 26. Create with David 3D scanner
 配合3D立體素描來創作 David 3D Scanner
 is a software can
 be download freely. ! Hardware BOM: ■ Arduino ■ Motor Drive ■ Stepper Motor ■ Web Cam ■ Line Laser We can scan any objects and replicate by RepRap
  • 27. “Put creams on cake” by Layers FDM (Fused Deposition Modeling) / FFF (Fused Filament Fabrication) 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
  • 28. Plastic Filament Extruding
  • 29. From 3D model to G code 1 Reading in 3D objects 2 Slicing the objects to make each build layer 3 Evaluating 2D geometry outlines 4 Generating cross-hatch infill 5 Arc compensation 6 Translate the tool path to G code
  • 30. Toolchains to generate G code RepRap Host Skeinforge RepSnapper
  • 31. “RepRap Host” VS “Skeinforge”
 G code generation print test result RepRap Host Skeinforge
  • 32. ▪“Support” printing are required if printing parts with hollow or invert slopes > 45° ▪Need to remove “Support” manually after the print done Something more about 3D Printing
  • 33. ▪Use heat bed to keep warm during printing to prevent object warp by cool down Something more about 3D Printing
  • 34. Thanks 43