This document describes the TinyBoy 3D printer project, which aims to create an affordable and small 3D printer for students. It summarizes the origins of 3D printing from the RepRap project in 2005. The TinyBoy printer is much smaller than typical RepRap printers, addressing issues like limited class time for students to print designs. Its specifications include a print size of 8.5x8.5x8.5 cm and use of 1.75mm plastic filament. The goal is for the open source TinyBoy design to be easily built and used by students to support hands-on design and creativity learning.

1. TinyBoy
Project
A 3D Printer for Student
by: Wan Leung Wong
2014

2. From the Beginning
Everything is started from
RepRap
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3. RepRap
short for “Replicating Rapid-prototyper“
http://reprap.org

4. RepRap was founded in 2005 by
Dr. Adrian Bowyer
Senior Lecturer in mechanical engineering at the University of Bath (UK)

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

6. RepRap’s Goal
▪ Everyone can replicate RepRap their own
▪ Cheaply distribute RepRap units to people and
communities
▪ Everyone can create complex products without
industrial support

7. How 3D printing works?
Design your
own 3D
model
Use toolchain
convert 3D
model into G
code
Send G
code to
control
board
Extrude
plastics by
layers until
print done
Control X/
Y/Z
Platform
and Extrude

8. RepRap
RepRap’s hardware structure
X/Y/Z
moving
platform
Filament
extruder
+
Hot nozzle
Control
boards
+
Motor
driver
Heat bed

9. RepRap’s hardware structure
X - axis
Y - axis
Z - axis
Control board
+
Motor Driver
Extruder
+
Hot Nozzle
Heat bed

10. “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

11. Plastic Filament Extruding

13. Something more about 3D printing
▪“Support” printing are required if
printing parts with hollow or
invert slopes > 45°
▪Need to remove “Support”
manually after the print done

14. Something more about 3D Printing
▪Use heat bed to keep warm
during printing to prevent
object warp by cool down

15. Design your own 3D model
▪ 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.
Blender
OpenSCAD

16. Toolchains to generate G code
RepRap Host Skeinforge RepSnapper

17. “RepRap Host” VS “Skeinforge”
G code generation print test result
RepRap Host Skeinforge

18. Create with David 3D scanner
配合3D立體素描來創作
We can scan any objects and replicate by RepRap
David 3D Scanner
is a software can
be download freely.
Hardware BOM:
■ Arduino
■ Motor Drive
■ Stepper Motor
■ Web Cam
■ Line Laser

19. ▪ Use for teaching, on teaching Design and
Creativity
Why Tiny Boy?
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20. 20

21. RepRap
2.5 Generation

23. Why TinyBoy?
▪ It’s Too Large!!!
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24. 24

25. Why TinyBoy?
▪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.
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26. Why TinyBoy?
▪So, Parker Leung, a high school teacher, started
this project in 2012.
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27. TINYBOY

28. 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.

31. Why TinyBoy?
▪Quality is no important
▪The most Important is everyone could have one
▪Then people can learn by themselves.
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33. ▪ Smaller
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34. FIT INTO THE GAP

35. Cheaper and Faster
in Production
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37. STUDENTS COULD BUILD IT BY THEMSELVES

39. STUDENTS’ WORKS

42. 42

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46. Thanks
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