FDM vs Resin 3D Printing: Which Should You Buy?
Filament printers make strong, practical parts; resin printers make fine, fragile detail. How to tell which one your projects need, and what each costs to run.
5 October 2026 · by Nate Calder
There are two kinds of home 3D printer, and they suit almost opposite jobs.
FDM (fused deposition modelling) melts plastic filament and lays it down line by line, like a very precise hot-glue gun. Resin (MSLA) cures liquid photopolymer one layer at a time with UV light through an LCD screen.
The short version
| FDM | Resin | |
|---|---|---|
| Best at | Practical, strong parts | Fine detail and smooth surfaces |
| Typical build volume | Larger (e.g. 256 mm cube) | Smaller (e.g. 210 x 120 x 220 mm) |
| Part strength | Tough; some materials flex | Brittle unless you use tough resins |
| Surface | Visible layer lines | Near-smooth |
| Mess | Minimal | Sticky liquid, alcohol, gloves |
| Fumes | Low with PLA; more with ABS/ASA | Needs real ventilation |
| After printing | Remove supports, done | Wash, cure, remove supports |
Choose FDM if
You want things that get used: shop jigs, brackets, clips, organisers, replacement parts, enclosures, prototypes. FDM parts are tough, the materials are cheap, and there is no chemical cleanup. For a woodworker, nearly every useful print is an FDM print. See 3D-printed workshop jigs and fixtures.
Start with a Bambu A1. See the best 3D printers for beginners.
Choose resin if
You want detail that FDM cannot reach: tabletop miniatures, jewellery masters for casting, dental or small precise models. Resin reproduces features finer than an FDM nozzle can draw.
Accept the costs first:
- Safety. Uncured resin is a skin sensitiser. Wear thick nitrile gloves, not latex. It gives off fumes as it prints, so the room needs real airflow.
- Process. Every print needs washing and UV curing before it is usable.
- Waste. Used alcohol and resin must be cured and disposed of properly, never poured away.
- Strength. Standard resin parts are brittle. Tough and flexible resins exist, but cost more.
See the best resin 3D printers.
If you cannot decide
Start with FDM. It is cleaner, cheaper to run and more broadly useful. You can add a small resin printer like the Mars 5 Ultra later, once you know which detail jobs you actually have.