3D Printing FoundationsUnderstanding Overhangs
9 / 14In progressIn progress

3D Printing Foundations

Course progress0/14
1Understanding 3D Printing
  • Introduction to 3D Printing
  • Understanding Scale
  • Your First Print-Sized Model
  • Checking Print Dimensions
2Build Plate & Wall Thickness
  • The Build Plate
  • Positioning Objects
  • Wall Thickness
  • Creating Thick-Walled Objects
3Overhangs & Supports
  • Understanding Overhangs
  • Self-Supporting Shapes
  • When to Use Supports
  • Optimizing for Minimal Supports
4Your First Print
  • Print Readiness Checklist
  • Project: Simple Keychain

3D Printing Foundations

Course progress0/14
1Understanding 3D Printing
  • Introduction to 3D Printing
  • Understanding Scale
  • Your First Print-Sized Model
  • Checking Print Dimensions
2Build Plate & Wall Thickness
  • The Build Plate
  • Positioning Objects
  • Wall Thickness
  • Creating Thick-Walled Objects
3Overhangs & Supports
  • Understanding Overhangs
  • Self-Supporting Shapes
  • When to Use Supports
  • Optimizing for Minimal Supports
4Your First Print
  • Print Readiness Checklist
  • Project: Simple Keychain

Overhangs: Fighting Gravity

Staircase demonstrating support concept
Like stairs - each step needs support below

Each layer needs something below it!

Info
FDM printing works by laying down molten plastic layer by layer. Each layer must have something to stick to - it can't print in mid-air!

The 45° Rule

Angle from VerticalResult
0-45°✅ Self-supporting
45-60°⚠️ May droop
60-90°❌ Needs support!
Tip
Imagine each layer as a row of bricks - each brick needs at least half of it resting on the layer below to stay up.

Self-Supporting Shapes

  • Domes and arches (gradual curves)
  • Chamfers instead of sharp overhangs
  • Cones with tip pointing up
Important
Best Practice: Design to minimize overhangs! It saves time, material, and produces cleaner results.