technologybriefs
9:10in productionCh. 1 · Not FFF at first/ 9:10 · ceiling 15 min
Hardware · Tech history

Fused filament fabrication

Crump

Crump’s 1988 invention became a public utility only after its patent died—and only because RepRap renamed it.

Fused filament fabrication is fused deposition modeling repackaged: same thermoplastic extrusion mechanism, same 1988 origin, same patent. RepRap renamed it to escape Stratasys’ trademark. Its real impact arrived only after the 2009 patent expiry enabled open hardware development. It delivers functional prototypes—not precision parts. It trades repeatability for accessibility.

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Chapters & takeaways4
  1. 0:50
    Not FFF at first

    Crump invented fused deposition modeling in 1988—not fused filament fabrication.

  2. 2:48
    A name to bypass law

    RepRap coined 'fused filament fabrication' solely to avoid trademark restrictions on 'FDM'.

  3. 4:20
    Freedom began in 2009

    The 2009 FDM patent expiry triggered unrestricted adoption—especially in open-source contexts.

  4. 5:44
    Same process, new name, no licence

    FFF is not a technical evolution of FDM—it is the same mechanism, rebranded and liberated.

Worth your time?

Yes. Study the whole thing.

4/ 5
What works
  • low-cost prototyping
  • rapid design iteration
  • community-driven firmware and toolchain development
What does not
  • achieve industrial-grade repeatability
  • eliminate thermal distortion without enclosure or substrate prep
  • support high-temperature or engineering-grade polymers without modification
Study it if
  • hobbyists
  • educators
  • early-stage product designers
Skip it if
  • aerospace component engineers
  • medical device manufacturers
  • high-volume injection moulding shops
The written brief1 min read

What it is and the problem it solves

Fused filament fabrication is a thermoplastic extrusion-based 3D printing process. It solves the problem of affordable, desktop-scale rapid prototyping for non-industrial users.

How it works

It heats thermoplastic filament to melting point and extrudes it layer by layer through a moving nozzle onto a build platform.

What works

Open-source firmware, community-driven hardware iteration, and plug-and-play filament compatibility work reliably across thousands of consumer and prosumer printers.

What does not

It does not achieve dimensional accuracy comparable to industrial subtractive methods. It does not eliminate warping, stringing, or layer adhesion failures without careful calibration and environmental control.

What it changes

It changed access to physical prototyping by decoupling 3D printing from proprietary hardware and licensing after the 2009 FDM patent expiry.

Is it worth your time

Yes—if you need low-cost, open-source prototyping with moderate precision and material flexibility. No—if you require tight tolerances, high strength, or production-grade surface finish.

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