FDM vs Resin 3D Printing: How to Choose (And Why Most Beginners Start with FDM)
Published: April 23, 2026
The single most common first question I get is “should I buy an FDM or a resin 3D printer”. It’s the right question to ask - they look similar in photos but they’re two genuinely different hobbies. Pick wrong and the machine ends up on a shelf.
Here’s the short version: most beginners should buy FDM. The rest of this article is the long version, so you can tell whether you’re one of the exceptions.
What each process actually does
FDM (Fused Deposition Modelling) melts plastic filament through a nozzle and draws each layer as a tiny bead of plastic. Everything visible on the machine is mechanical - a gantry moves the nozzle, the bed heats, motors whine. If you’ve seen a 3D printer in the wild, it was almost certainly an FDM.
Resin (MSLA, SLA, DLP are all variations) shines UV light through a mask onto a vat of liquid photopolymer, hardening one full layer at a time. The machine itself is almost silent - no moving nozzle, just a bed that rises a fraction of a millimetre between each exposure. When you open one mid-print, a print plate emerges upside-down from a pool of goo. It looks like science.
Both build parts layer by layer. Everything else about them is different.
Where FDM wins
Material flexibility. An FDM printer happily switches between PLA, PETG, TPU, ABS, ASA, nylon and carbon-fibre-filled engineering plastics - with the hardware support. That’s an enormous range of functional properties: flexible phone cases in TPU, heat-resistant car parts in ABS, load-bearing brackets in PA-CF. Resin printers only print resin, and while resin formulations vary (tough, rigid, castable, dental), none of it behaves like a real engineering thermoplastic.
Running costs. PLA filament is roughly £15-20 per kilo. Resin is £20-30 per litre, plus you need IPA for washing, replacement LCD screens every 1500-2500 print hours, nitrile gloves, filters and consumables. Over a year of regular printing the gap is real money.
Build volume. FDM machines at £300 offer 250x250x250 mm build areas - easily enough for full-scale cosplay helmets in pieces, functional brackets, household parts. Resin at the same budget gives you a build area closer to 218x123x230 mm, which suits a tray of miniatures but not a phone cradle.
Easier workflow. Slice, load filament, press print, come back later. That’s it. The part comes out solid and ready. No washing, no curing, no gloves.
Less hazardous. Uncured resin is a skin irritant and some formulations are sensitisers. Cured resin and finished parts are inert, but the workflow involves nitrile gloves and careful waste handling. FDM just has a hot nozzle and a spool of plastic. Keep fingers away and you’re fine.
Where resin wins
Fine detail. This is the headline advantage and it’s not subtle. A current 8K resin printer has an XY pixel size of about 22 µm - roughly 10-15x finer than an FDM nozzle can resolve. On a painted tabletop miniature or a jewellery prototype, the gap is the difference between “that looks amazing” and “let’s not talk about it”. If you print figures at 28 mm or 32 mm scale, or anything with sub-millimetre surface detail, resin is the right answer.
Surface quality on small parts. Even without painting, resin parts come off the printer with smooth walls. FDM leaves visible layer lines unless you specifically work around them (ironing, variable layer heights, post-processing). For dental crowns, jewellery moulds, small prototypes and anything shown in close-up, that matters.
Speed-per-batch on small parts. Resin prints a full plate at once, regardless of how many objects are on it. One mini takes the same time as twenty minis. FDM is linear - ten copies takes ten times as long as one.
The workflow gap is the real decision
On paper, you could build a list of features and pick whichever printer “wins”. In practice, the workflow differences dominate.
FDM workflow:
- Slice your model, send to the printer.
- Come back when it’s done. Pop it off the bed.
Resin workflow:
- Slice with careful support generation (gravity matters here in a way it doesn’t for FDM).
- Print.
- Put on nitrile gloves.
- Wash the print in IPA (ideally in a wash-and-cure station, roughly £80-130 on top of the printer).
- Cure under UV for 2-10 minutes.
- Remove supports with snips or a hobby knife.
- Dispose of used IPA responsibly. It’s a controlled waste, not something you pour down the sink.
Both workflows are fine once you’re used to them. But be honest with yourself about how much faff you’ll tolerate. I’ve watched more than one friend buy a resin printer, print two things, get the urge to do gloves-and-IPA again approximately never, and quietly sell the machine six months later.
Budget realities
You can start in either category under £250. That’s genuinely new to the hobby - five years ago serious resin machines cost £400+ and “cheap” FDM was a kit build.
For FDM in 2026, £200-£350 is the honest sweet spot. You get auto-levelling, a competent motion system, PEI-coated beds and a community that has documented every failure mode. See best 3D printers under $300 and best 3D printers under $500 for live shortlists.
For resin at the same budget, you’re buying an 8K mono-LCD machine - Elegoo Mars, Anycubic Photon Mono, Phrozen Sonic Mini class. See best resin 3D printers under $300.
Remember that resin’s effective budget is higher than the printer alone. Budget another £100-150 for a wash-and-cure station, gloves, IPA, a funnel with filter, and proper ventilation. FDM’s effective budget is basically the printer plus filament.
Who should buy FDM
- First printer, any purpose. The workflow is simpler and the hobby is easier to abandon cleanly if it’s not for you.
- Functional parts. Brackets, adapters, replacement parts, jigs, fixtures. FDM eats these for breakfast.
- Cosplay props and helmets. FDM’s larger build volume and lower running cost make it right for anything you could hold in two hands.
- Printing in the family room. No fumes, no IPA, no nitrile gloves. A quiet enclosed FDM is a perfectly reasonable thing to run in a home office or even a kitchen.
- Educational settings. See my best 3D printers for schools and classrooms shortlist - classrooms want enclosed, auto-levelling, easy-to-supervise machines. That’s FDM.
If any of these describe you, start with FDM. Head to the best for beginners shortlist and pick whichever is cheapest with modern auto-levelling.
Who should buy resin
- Tabletop miniatures. 28 mm or 32 mm scale minis are the killer use case for resin. FDM simply cannot match the detail. See my best 3D printers for miniatures shortlist.
- Jewellery and small prototyping. Castable resins let you print direct-to-cast patterns. Nothing in FDM touches this.
- Dental work. A specific vertical with its own resins, machines and certifications. Usually in the £1,000+ tier.
- High-detail display models. Busts, figurines, model ship or aircraft kits. Anything where the finish is the point.
- You have a dedicated space to print in. A garage, shed, workshop or even a well-ventilated hobby room. Not a kitchen, not a bedroom.
If any of these are your primary use case, buy resin. If you also want to print functional or large parts, you’ll end up with both machines eventually.
The honest summary
FDM is the broader tool. Resin is the sharper tool. Most hobbyists start with FDM because the first year of 3D printing is mostly about figuring out what you actually want to print. FDM lets you explore without being locked into one use case.
If you already know you want minis, buy resin first and don’t let anyone talk you out of it. If you’re genuinely unsure, buy FDM and let the second printer be informed by a year of experience.
If you’re stuck, these two shortlists will get you to a printer in ten minutes:
- Best 3D printers under $500 - FDM sweet-spot.
- Best resin 3D printers under $300 - resin entry tier.
Both shortlists update from live Amazon prices on every page load. No cached “best of 2024” nonsense.