3D Printing

How FDM 3D printing works, in plain words

10 Oct 2026 · 8 views
How FDM 3D printing works, in plain words

FDM stands for fused deposition modelling. It is the most common type of 3D printing, and the one used for most keychains, name plates and prototypes.

The process

  1. A 3D model is cut into thin horizontal layers by software, called slicing.
  2. A printer melts plastic filament and pushes it through a small nozzle.
  3. It draws one layer, moves up slightly, and draws the next on top.

Layer height

Thinner layers give a smoother surface and finer detail, but take longer. Thicker layers print faster and are fine for functional parts.

Strength has a direction

Parts are strongest along the layers and weaker between them, so the way a part is placed on the bed matters. A hook that must bear load should be printed so the layers do not peel apart.

Supports

Overhanging parts need temporary supports, which are removed afterwards and can leave small marks. A good design reduces how many supports are needed.

What it is good for

  • Keychains, name signs and personalised gifts
  • Prototypes and test fits
  • Custom brackets, clips and holders
  • Display models

What it is not for

Very fine, glossy, injection-moulded looking surfaces need finishing work, and parts for heat or heavy load need the right material. Tell us the use and we will advise.

See upload your file for a quote or read about materials.

#3D printing #FDM #additive manufacturing #PLA
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