Intro to 3D Printing with Bambu Printers

Day 3: Designing for 3D Printing — File Types and Tinkercad

Day 3: Designing for 3D Printing — File Types and Tinkercad

🎯 Learning Objectives

  • Explain the difference between STL, 3MF, and G-code in plain language
  • Create an original 3D design in Tinkercad
  • Export your design from Tinkercad and bring it into Bambu Studio
  • Trace the full path from idea to printed object

⏱️ Time Guide

PartActivityTime
1File Types10 min
2Workflow5 min
3Intro to Tinkercad15 min
4Design Activity40 min
5Export & Bambu Studio10 min
6Exit Ticket5 min
7Submit5 min

🚀 Goal

Today you go from using someone else's designs to building your own. You'll learn the file types behind 3D printing, create an original model in Tinkercad, and see it move one step closer to becoming real.

📖 How to Use This Page

  • Work through one part at a time — top to bottom
  • Complete every activity before clicking Mark Complete
  • Pause when the teacher asks you to
  • Your progress saves on this device — refresh won't lose your work

✅ Success Criteria

  • I can explain STL, 3MF, and G-code in my own words
  • I created a Tinkercad design I'm proud of
  • I exported my design and can see it in Bambu Studio
  • I answered the exit ticket honestly and completely

📚 Day 3 Vocabulary — Tinkercad & Design

Review these terms before you start. You'll see most of them in today's activities. 📖 Open Full Glossary

Workplane — The flat surface in Tinkercad where you build your 3D designs. All shapes are placed on the workplane.
Shape — A basic 3D building block in Tinkercad (cube, cylinder, sphere, etc.) that you combine or subtract to create your design.
Hole — In Tinkercad, a "hole" is a transparent shape used to cut into other shapes. When grouped with a solid shape, it creates a void or cutout.
Group — Combining two or more Tinkercad shapes into one object. Grouping a hole with a solid cuts the hole shape out of the solid.
STL — Standard Tessellation Language. A file format that stores the 3D shape of a model as a mesh of triangles. No color or settings included.
3MF — 3D Manufacturing Format. A newer file format that stores shape plus color, materials, orientation, and print settings in one file.
Export — Saving your Tinkercad design as a file (like STL or 3MF) that can be opened in Bambu Studio or other software.
Design Iteration — The process of making, reviewing, and improving a design multiple times to get a better result.
Step 1 of 7 Active File Types: STL, 3MF, and G-code
📌 Instructions: Read through the file type cards and vocabulary, then take the quick quiz before moving on.

🗂️ Common 3D Printing File Types

Before you design, you need to know what kinds of files are used in the 3D printing process. Here are the three you will encounter most often.

📐

STL

The Shape

STL (Standard Tessellation Language) is one of the most common 3D printing file types. It stores the shape of an object as a mesh of triangles. STL files do not include color, materials, or print settings — just the geometry.

✨

3MF

Smarter Design File

3MF (3D Manufacturing Format) is a newer, smarter format. In addition to shape, it can store color, materials, scale, orientation, and print settings. Bambu Studio uses 3MF files to save your full project.

🤖

G-code

Printer Instructions

G-code is the machine language created by your slicer (Bambu Studio). It tells the printer exactly where to move, how fast to go, and when to heat up. G-code is what actually runs the printer.

💡 Keep it simple:  STL = the shape  |  3MF = smarter design file  |  G-code = printer instructions

📚 Vocabulary

STL — Stores only the shape of a 3D model as a mesh of triangles.
3MF — A newer file format that stores shape plus color, materials, and settings.
G-code — Machine instructions created by the slicer that tell the printer exactly what to do.
Slicer — Software (like Bambu Studio) that converts a 3D model into G-code layers.
Workplane — The flat surface in Tinkercad where you build your 3D designs.

🧠 Knowledge Check

Question 1 of 3

Step 2 of 7 Locked The 3D Printing Workflow
📌 Instructions: Study the workflow, then match each step to what it means. You need at least 3 out of 4 correct to continue.

🔄 Design → Export → Slice → Print

Every 3D print you'll ever make follows this same path. Knowing what each step does makes it easier to catch problems before they waste your time — or a whole roll of filament.

1

Design

Create your 3D model using a tool like Tinkercad — or generate one from an image using a tool like the Keychain Generator on Day 4.

2

Export

Save your design as an STL or 3MF file. This gives you a file you can bring into your slicer.

3

Slice

Import your file into Bambu Studio. The slicer converts it into G-code — layer-by-layer printer instructions.

4

Print

Send the G-code to the 3D printer and watch your design become a real object — one layer at a time.

🔗 Matching Activity

Match each workflow step to the correct description.

Step 3 of 7 Locked Intro to Tinkercad
📌 Instructions: Watch the video, answer the quiz, then join your class in Tinkercad using the link for your session.

🎥 Watch: TinkerCad Introductory Video

🧠 Check for Understanding

Question 1 of 5

🔗 Join Your Class in Tinkercad

Use the link for your session to join your class in Tinkercad:

✅ Before you continue, check all three boxes:

Step 4 of 7 Locked Tinkercad Advanced Project
📌 Instructions: Browse the Tinkercad Designs page, choose a project that matches your experience level, and work through it in Tinkercad. You're in charge of what you make — pick something that excites you.
🎨 This is your first original 3D design. The collection covers everything from animals and jewelry to architecture and gadgets — find something that sparks your curiosity and go for it.

🔗 Browse & Choose a Project

Visit the Tinkercad Designs page and choose one project to complete — pick based on your experience with Tinkercad prior to this class:

https://www.tinkercad.com/learn/designs

💡 How to choose:
  • 🟢 New to Tinkercad? Look for Starter or Easy projects — something simple you can complete in class.
  • 🟡 Used Tinkercad a few times? Try a Medium difficulty project that uses shapes, holes, and grouping.
  • 🔴 Comfortable with Tinkercad basics? Challenge yourself with a Hard project that pushes your skills.

📋 Project Requirements

  • Browse the designs page and pick a project that matches your experience and interests you
  • Follow the steps for your chosen project in Tinkercad
  • Name your design clearly: Day3_AdvancedProject_YourName
  • Tinkercad saves automatically — make sure your design is saved before moving on

✅ Project Checklist — check all five before continuing:

Step 5 of 7 Locked Export & Bambu Studio Preview
📌 Instructions: Export your design from Tinkercad and bring it into Bambu Studio. You're not printing today — just previewing what your print would look like.
🔁 This is the handoff. Your design moves from Tinkercad to Bambu Studio — like handing a blueprint to the factory. You're just previewing today, but this is exactly what printing day will look like.

📤 Export from Tinkercad

  1. In Tinkercad, click the Export button in the top-right corner.
  2. Choose STL format. Tinkercad will download the file to your computer.
  3. Rename the file clearly: Day3_AdvancedProject_YourName.stl

🖥️ Import into Bambu Studio

  1. Open Bambu Studio on your computer.
  2. Drag your STL file onto the print bed, or use File → Import.
  3. Check that your model appears correctly on the print bed — it should look like your design in Tinkercad.
  4. Look at the size indicator to confirm your design is small and would print reasonably quickly. No need to slice today — just preview!

✅ Export Checklist — check all four before continuing:

Step 6 of 7 Locked Exit Ticket
📌 Instructions: Answer all three in your own words. There are no wrong answers — just be honest and specific. This helps your teacher plan what comes next.
Step 7 of 7 Locked Submit Your Work
📌 Instructions: You designed something original today. Click Generate My Responses to collect everything you wrote and paste it into your Digital Notebook in Google Classroom.