FDM

Also known as: Fused Deposition Modeling, FFF, Fused Filament Fabrication

beginner General

The most common 3D printing method, where plastic filament is melted and deposited layer by layer.

FDM (Fused Deposition Modeling), also called FFF (Fused Filament Fabrication), is the most common type of consumer 3D printing. Plastic filament is melted and deposited in layers to create objects.

How FDM Works

  1. Filament fed into heated nozzle
  2. Plastic melts
  3. Nozzle deposits thin line of plastic
  4. Layer builds up
  5. Repeat for each layer

Advantages

  • Affordable - Cheapest printers and materials
  • Easy to use - Minimal post-processing
  • Wide material choice - Many filament types
  • Large build volumes - Available at reasonable cost

Limitations

  • Visible layer lines
  • Limited resolution vs. resin
  • Support removal can be difficult
  • Overhangs need support

FDM vs. SLA

FeatureFDMSLA
ResolutionLowerHigher
SpeedFasterSlower
CostLowerHigher
Post-processingMinimalRequired
MaterialsManyLimited