Digi-Fab

A Collection of Tools

Digital fabrication refers to the use of computer-controlled tools and processes to create physical objects from digital designs. It's an umbrella term that encompasses various technologies, including 3D printing, laser cutting, CNC machining, and more

3D Printer

Laser Cutter

Vinyl Cutter / Plotter

CNC Milling Machine

Waterjet Cutter

3D Printing

Why Use it? Why not?

• Enables rapid iteration with precision
• Can create very complex parts that couldn't be created through other means
• Low cost & little waste
• Huge support community

• More software experience needed to 3D model & modify parts
• Generally slower than other fabrication methods
• Post processing may be required

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3D Printing

What Is It?

3D printing is a manufacturing process where a digital model is turned into a physical object by adding material layer by layer. This process is controlled by a computer and commonly uses materials like plastic, metal, or resin to create a wide range of objects, from prototypes and tools to final products.

Key Concepts

Printer Types

3D printers come in several types: FDM extrudes melted plastic; SLA and DLP use UV light to cure resin; SLS and SLM fuse powdered materials with lasers; and and PolyJet uses jets to deposit materials, allowing for high precision and multi-material prints.

Each type is suited for different applications and materials.

Key Concepts

FDM Printers

Cartesian

Delta

Core XY

Conveyor Belt

Key Concepts

FDM Materials

Strategies

Considerations

Build Volume

Support Material

Infill Percentage

Layer Orientation & Resolution

Part Orientation

Strategies

Building by Layers

Because you are stacking melted plastic on other extruded plastic, 3D printing is like building a sand castle. Your castle shape must stack sand on other sand underneath it.

Strategies

Building by Layers

If the design you create causes the 3D printer to float melted plastic in the air, without supporting plastic layers underneath it, your print will fail.

Strategies

Overhangs

A 3D printer can generally print overhang layers to a certain angle (~45°) before the quality of the print begins to be affected.

Newer printers, with more sophisticated cooling systems, such as the Prusa MK4S can print at much steeper overhangs, up to 75° or greater

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Strategies

Support Material

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Supports can later be broken off of the completed print

If the design requires overhangs, supports can be generated by the  3D printer software to hold up the overhanging material.

Strategies

Part Orientation

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Whenever considering using supports, first question if rotating the part

on the print bed would allow a print without supports.

When printing a difficult shape, like a sphere, consider splitting the shape 

into two pieces (two domes) which would allow an easy print with no supports. 

The orientation (rotation) of a print can also affect its quality. Standing this part vertically is a better orientation.

Strategies

Infill and Layer Resolution

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3D prints are not solid. They are an outside wall of plastic with an “infill” pattern that can be set to very empty to very dense.

Similarly, 3D prints can be printed with different layer heights, leading to more refined and smooth surfaces at the cost of time.

3D Printing

Custom Models vs Downloaded Content

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Thingiverse

Custom Designed Model

Slip-Cast Ceramic

Zoom Widgets

Molded Bioplastic

Hand Drive for Wheel Chair

Polar Bear Cake

Pressed Paper Pulp

A Few Applications

MK1

MK3

MK2

MK4

Case Study

Persephone VR Headset

Case Study

Persephone VR Headset

Jade

To prepare a design for 3D printing, create a 3D model and export it as an STL or OBJ file, which can be sent to a 3D printer. Here are common software options:

1. Tinkercad (Free, very easy)
2. SketchUp – (Free or license, intermediate)
3. Fusion 360 (License needed, intermediate)
4. AutoCAD (License needed , intermediate)
5. Blender (Free, Advanced)
6. Rhino – (License needed, Advanced)
7. SolidWorks – (License needed, Advanced)

؜3D Designs

What is Tinkercad?

Tinkercad is a fun and easy-to-use computer program that helps you make 3D designs.

Check out the Tinkercad 101 deck for a step-by-step tutorial.

Resources

Resources

Tinkercad has a variety of built-in resources including a learning center with dozens of step-by-step tutorials and a collection of challenges.

3D Printing

Slicer Workflow

3D Printing Pipeline

The 3D printing workflow is a process that starts with a 3D model in a CAD software that is exported to a 3D printer slicers software, which prepares the file for the printer.

CAD Software

Online Database

Slicer Software

3D Print!

CAD Model

Fusion 360

Rhino

Tinkercad

Onshape

Thingiverse

Myminifactory

Printables

GrabCAD

Cura

Prusa Slicer

Simplify 3D

Chitubox

Prusa

Bambu Lab

Creality

Anycubic

1. 3D Printing

• Export your 3d design as STL file

Open Your Slicer

1. Prusa: Use PrusaSlicer
2. Bambu: Use Bambu Studio
3. Ultimaker: Cura or Prusaslicer

1. Open your slicer software.

Import your 3D work

Click “Add/Import Model” or drag the STL file into the workspace.

Position & Scale

1. Check the model’s orientation – the flattest side should face the build plate.
2. Scale the model if needed.
3. Move the model so it sits on the build plate (z=0).

Move

Scale

Rotation

Use this tool to cut the object into 2 parts

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Bambu Studio

Prusa

Cura

Choose Print Settings

Infill is how much you want the object to be filled from the inside

1. Material: PLA, PETG, etc.
2. Layer Height: 0.2 mm (standard)
3. Infill: 15–20% for decorative parts, 50%+ for strong parts.

Select Your Printer

1. Look for “Printer” or “Select Printer” in the menu.
2. Choose your printer from the list:
3. PrusaSlicer: e.g., Prusa i3 MK4, MINI+
4. Bambu Studio: e.g., Bambu Lab X1, X1 Carbon
5. The slicer will automatically set the build volume, nozzle size, and default settings for that printer.
6. If your printer isn’t listed, you can add a custom printer using its specs (build size, nozzle, filament type).

Bambu Studio

Prusa

Cura

Next step is adding supports so overhangs print correctly. ؜Only add supports where needed to save filament and make removal easier. For simple models, you might not need any.

Add Supports

Add Supports

؜PrusaSlicer

1. Go to the “Print Settings” panel.
2. Find “Support material” → check “Generate support material”.
3. Choose the support type:
4. Everywhere → supports under all overhangs
5. Build plate only → only supports that touch the build plate
6. Adjust overhang threshold (default ~45°; higher = fewer supports).
7. Preview your model to see where supports will be added.

؜Cura

1. Open the Print Setup panel.
2. Scroll to “Support” → enable Generate Support.
3. Choose “Support Placement”:
4. Everywhere or Touching Buildplate
5. Set Overhang Angle (default 45°).
6. Use Preview mode to verify placement.

؜Bambu Studio

1. After importing your STL, go to “Supports”.
2. Turn “Auto Supports” ON. Bambu Studio automatically calculates needed supports.
3. You can also manually add/remove supports if necessary.
4. Preview to confirm everything is supported properly.

Slider to check print

؜You can drag the slider to see printing time and the process of printing.

1. Shows how the machine will cut or print step-by-step.
2. Lets you check mistakes before starting.
3. Helps you see which layer or path happens first or last.

Slider to check print

Click “Preview” at the top of the screen (after slicing). The vertical slider appears on the right side of the screen.

Drag slider up/down to move through layers. Shows supports, infill, and print order.

CURA

Click "Slice". The layer slider appears on the right side. There is also a play button to watch the print animation.

You can also toggle toolpaths and speed visualization.

BAMBU

PRUSA

؜Click "Slice" . The layer slider appears on the right side of the workspace.

1. Right-click (or click the + icon) on a layer
2. Select Add Color Change / Pause
3. The printer will stop at that layer, letting you change filament

Choose how detailed you want your model to be, keep in mind;

more details = more printing time

Finally, Export G-code which is sent to the Printer

1. Via SD card / USB / Wi-Fi / cloud (depends on printer). This is for Ultimakers and Prusas.

Most Bambu printers don’t use an SD card like traditional Prusas. They are designed to work with Bambu Studio or the Bambu app for sending prints.

Print Settings

Export G-Code

That's it!



Now you can take your SD card to the 3d printer

Next Slide

Prusa Machine

Jump to next session for either the Ultimaker or Bambu

؜Turn on your machine

1. Power switch ON
2. Wait for the screen to load

Load Filament

1. On the screen: Filament → Load Filament
2. Select filament type (PLA, PETG, etc.)
3. Printer heats nozzle
4. Insert filament until it feeds
5. Confirm when filament comes out clean

Prepare the Bed

Make sure build plate is:

1. Clean (no glue blobs / fingerprints)
2. Correct side (smooth vs textured)

Place plate properly on magnets

Insert SD Card / USB

1. Insert the SD card into the 3D printer's SD card slot on the left side.
2. Print → Select file

Printer will:

1. Home axes
2. Heat bed & nozzle
3. Auto bed level
4. Start printing

Nozzle temperature

Bed temperature

the process of printing in percentage

File's name

To edit the setting you can go to "Tune"

Printing speed 40–60 mm/s

Nozzle temperature 200–210 °C

Bed temperature 55–60 °C

Edit Settings

Fan speed 255

Material Flow 95

To edit the setting you can go to "Tune"

Edit Settings

During the Print

It will start by getting rid of a the plastic in the nozzle

Watch first layer

If needed:

1. Adjust Live Z
2. Pause / Stop from screen

After Print Finishes

Let bed cool

Remove print

Turn printer OFF

Next Slides

Bambu Machine

Jump to next session for either the Ultimaker

؜Turn on your machine

1. Power switch ON
2. Wait for the screen to load

Prepare the Bed

Make sure build plate is:

1. Clean (no glue blobs / fingerprints)
2. Correct side (smooth vs textured)

Place plate properly on magnets

Load Filament

With AMS (Automatic Multi-Material System)

1. Load each filament spool into the AMS slots.
2. In Bambu Studio, make sure each filament is assigned to the correct AMS slot before slicing.
3. The printer will pull filament automatically during printing.

Without AMS (Manual Loading)

1. On the touchscreen → Filament → Load.
2. Heat nozzle if prompted.
3. Insert filament into the feeder until it starts extruding cleanly.

Use the Preview Slider

As we have already sliced our file, we will now go to Preview.

Use the layer slider to check:

1. Layer order
2. Supports
3. Where filament changes or pauses occur

Click a layer in the slider → Add Pause / Filament Change.

Assign AMS slot or plan manual change.

Add Pauses / Color Changes (Optional)

Click a layer in the slider → Add Pause / Filament Change.

Assign AMS slot or plan manual change.

Bambu Studio — Standard Print Settings (PLA)

1. Nozzle Temp 205 °C
2. Bed Temp 60 °C
3. Print Speed 50 mm/s
4. Layer Height 0.2 mm
5. Material Flow 100%
6. Fan Speed 0% for first 2 layers → 100% rest
7. Supports As needed
8. Retraction Default (4–6 mm)
9. Brim/Raft - Optional -Only if first layer adhesion is tricky

Start the Print

Click Print in Bambu Studio.

Printer will:

1. Home all axes
2. Heat bed and nozzle
3. Check filament
4. Auto-level bed
5. Begin printing

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Start the Print

Watch the first layer carefully, it’s crucial for adhesion.

If needed:

1. Pause → adjust filament / fix small issues
2. Monitor print progress using live slider in Studio or touchscreen

Finish the Print

Printer signals when finished.

Let bed cool.

Remove print carefully.

1. If done for the day, turn OFF the printer.

Next Slides

Ultimaker

؜Turn on your machine

1. Power switch ON
2. Wait for the screen to load

Prepare the Bed

Make sure build plate is:

1. Clean (no glue blobs / fingerprints)
2. Correct side (smooth vs textured)
3. Some Ultimakers have removable flexible plates — snap them in place.

Load Filament

1. From touchscreen: Material → Load
2. Select the filament type and color
3. Printer heats nozzle automatically
4. Insert filament until it feeds cleanly through the nozzle
5. Confirm when the printer detects proper extrusion

Send File to Start

Options:

1. USB stick → insert into printer
2. Wi-Fi / Ethernet → send directly from Cura
3. Ultimaker App / Cloud → optional

On printer touchscreen → select file

1. Printer will:
2. Home axes
3. Heat nozzle & bed
4. Level bed automatically (if auto-leveling)
5. Begin printing

After Print Finishes

Let bed cool

Remove print

Turn printer OFF

Leverage curiosity of your students!

Make the machines accessible - lower barrier to entry for beginners

Encourage a balance of downloaded content with custom models

Catalog and discuss failures - they will happen!

Set clear guidelines are print-time and material use

Encourage peer to peer training with students

Use 3D printing to support other fabrication workflows

Insights on supporting

3D Printing in your makerspace

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