## Workshop #008 Delft Open Hardware:
# 3D printing

Date: 22 April 2022
Time: 13:30 - 16:30
Location: Orange room
Organizers: Jannes-Anđela
[Presentation](https://docs.google.com/presentation/d/1uc0uODKfUWTZoC64XyXLQRHfnL_K6mDkXofnGaf6S-4/edit)

### Agenda
:::info
13:30-13:40 Welcome
13:40-14:00 Quick history and theory on 3D printing
14:00-14:20 Slicer software
14:20-14:35 Exercise 1: Preparing a print
14:35-14:45 Break - intermission
14:45-15:05 Design for 3D printing
15:05-15:35 Exercise 2: Designing in TinkerCAD
15:35-15:45 Questions, help with models, break
15:45 till done Printing the models made in the exercises
16:00-16:15 Closing
:::

[**Click here to go to Q&A box or scroll down.**](https://hackmd.io/bdCYBZ2VSjeT90-NVfiX_A?both#12-QA)

## To do first:
- Download and install Cura: [link](https://ultimaker.com/nl/software/ultimaker-cura)
- Sign up to TinkerCAD: [link](https://www.tinkercad.com/join)

### Learning goals
- Basic understanding of what 3D printing is and when you can use it.
- Know how to design simple models in CAD
- Know how to prepare your design for printing
- Get some basic tips and tricks

## 1. History on 3D printing.
 There are 3D printed objects that are thousands and thousands years old. They have been printed by nature through the simple process of dripping the water. Yes those are stalagmites and it takes 100 years to make 1 cm layer (0.0007 – 0.929 mm/yr) , with this natural 3D printer.

For us humans that is too long, so we had to come up with a better solution. Dreaming about 3D printing is almost century old. There were and still are plenty mechanical tools that can cut metal, wood and other materials following the simple or more complex paths and shapes.

With the industrial revolution, all different machines came in place. Some of them were “programmable” to cut and modify wood or metal in certain way.


### 2. First attempts to 3D print
Real boom happened in ‘70 last century when computers and new materials came on the technological development stage. First 3D printers were huge

### 3. Historical moment of twist
### 4. Different 3D printing techologies
 • Stereolithography (SLA)
 • Selective Laser Sintering (SLS)
 • Digital Light Process (DLP)
 • Multi Jet Fusion (MJF)
 • PolyJet
 • Direct Metal Laser Sintering (DMLS)
 • Electron Beam Melting (EBM)
 • Fused Deposition Modeling (FDM)
### 5. What is PLA and why PLA?
### 6. Slicer software - why we need it
### 7. CURA - examples
### 8. Practical slicing exercise
- exercise 1 (#Excercises)
- advance exercise 2

### 10. Screen share, and CURA functions
### 11. Mentioning the advanced part and G-Code
## 12. Q&A

---

Just start typing here. Add a number.
1.
2.

---

### 13. **Design for 3D printing**: Design guidelines and considerations to design products that can be (FDM) printed.
### 14. **Exercises** in TinkerCAD:
- Novice: name tag
- Intermediate: cable clasp for 7 mm cable with 1 screwhole
- Intermediate to advanced: ring with intricate design
- Anywhere in between: your own project

**Critical Requirement:** printable in >10 minutes

[TinkerCAD](https://www.tinkercad.com/join)
or use the software you already have.

# Future readings
https://www.hubs.com/knowledge-base/key-design-considerations-3d-printing/
https://www.hubs.com/knowledge-base/enclosure-design-3d-printing-step-step-guide/
https://all3dp.com/1/types-of-3d-printers-3d-printing-technology/

# Free 3D objects on the internet
https://www.thingiverse.com/
https://grabcad.com/

# Video of the event
This will be added later

## Future events
20 May - Seminar: Open Hardware programme (Aug till October)
24 June - Workshop: TBD
<br>
<br>
<hr>
# Excercises
<div id="Excercises"></div>

## 1. Slicing exercise - cable holder
To prepare:
- Download and install Cura: [link](https://ultimaker.com/nl/software/ultimaker-cura)
- Download 3D object - Cable Holder: [link](https://www.thingiverse.com/thing:2798023)

Exercise: try to prepare this object for printing. Try to create as much as you can copies of the same object in one print.

## 2. Advance slicing exercise - an astronaut
To prepare:
- Download and install Cura (if you don't have it already): [link](https://ultimaker.com/nl/software/ultimaker-cura)
- Download 3D object - An Astronaut: [link](https://www.thingiverse.com/thing:230305)

Exercise: try to prepare this object for printing, and think what the additional parameters and settings you need to change in CURA to be able to get the correct and good print.

## 3. Exercise with openscad
How would you make the TU Delft sticker using a different software.
- Download openscad

You can try recreating this model by downloading openscad and running this script.

This was my label scad code:

$fn=60;

laag=0.4;
fsize=12;
d=fsize+2;
l=55;
tekst="TUDelft";
offset=l-2;
dikte=laag*3;
translate([offset,(d-fsize)/2,dikte-laag]) 
    linear_extrude(height=laag*3) 
    text(text=tekst,size=fsize,font="Arial",halign="right");
color("red") difference() {
    hull() {
        translate([-d/2,d/2,0]) cylinder(h=dikte,d=d);
        cube([l,d,dikte]);
    }
    translate([-d/2,d/2,-1]) cylinder(h=laag*10,d=d-4);

### CAD software
Here are a few links
- [FreeCAD](https://www.freecadweb.org/):oo
- [Fusion360](https://www.autodesk.eu/products/fusion-360/overview?term=1-YEAR&tab=subscription):
- [Onshape](https://www.onshape.com/en/):
- [TinkerCAD](https://www.tinkercad.com/):o
- [Vectary](https:/app.vectary.com/):
- [Sketchup](https://www.sketchup.com/):
- [Figuro](https://figuro.io//):
- [OpenSCAD](https://openscad.org/):

# Feedback

## What is your background?
Put an o next to the option bellow:

Phd:
Bachelor:
Master:
Staff: oooo
Researcher:
Other:

## What motivated you from joining the workshop?
- I've heard a lot about 3D-printing, but I did not actually know anything about it, so I thought it would be nice to see what it's about.

## Share one thing you liked about the workshop
- I liked that there was the opportunity to actually make something small and print it. It makes it more real, in a sense.

## Share what you didnt like or could be improved

# Thanks to
Andjela Tomic, Jannes Nelissen, Jerry de Vos, Santosh Ilhamparuthi, Arco Van Geest, Jose Urra,