A 3D Printer for Student

by: Wan Leung Wong

2014

TinyBoy Project

Everything is started from RepRap

From the Beginning

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RepRap

short for “Replicating Rapid-prototyper“

http://reprap.org

RepRap was founded in 2005 by

Dr. Adrian Bowyer Senior Lecturer in mechanical engineering at the University of Bath (UK)

▪ 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?

▪ 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

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?

RepRap

X/Y/Z moving

platform

Filament extruder

+ Hot nozzle

Control boards

+ Motor driver

Heat bed

RepRap’s hardware structure

RepRap’s hardware structure

X - axis

Y - axis

Z - axis

Control board +

Motor Driver

Extruder +

Hot Nozzle

Heat bed

“Put creams on cake” by Layers

FDM (Fused Deposition Modeling) / FFF (Fused Filament Fabrication)

1. Thermoplastics filament are liquefied anddeposited by an extrusion head

2. Follows a tool-path defined by the CAD fileand materials deposited in layers in 0.3 mm

3. Part is built from the bottom up by layers

Plastic Filament Extruding

▪“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

▪Use heat bed to keep warm

during printing to prevent

object warp by cool down

Something more about 3D Printing

▪ 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

Toolchains to generate G code

RepRap Host Skeinforge RepSnapper

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

RepRap Host Skeinforge

Create with David 3D scanner 配合3D立體素描來創作

David 3D Scanneris 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

▪ Use for teaching, on teaching Design and Creativity

Why Tiny Boy?

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RepRap

2.5 Generation

▪ It’s Too Large!!!

Why TinyBoy?

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▪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?

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▪So, Parker Leung, a high school teacher, started this project in 2012.

Why TinyBoy?

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TINYBOY

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.

▪Quality is no important ▪The most Important is everyone could have one ▪Then people can learn by themselves.

Why TinyBoy?

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▪ Smaller

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FIT INTO THE GAP

Cheaper and Faster in Production

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STUDENTS COULD BUILD IT BY THEMSELVES

STUDENTS’ WORKS

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Thanks

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