3D printing vs CNC routing
The maker world treats these as rival answers to one question. They are not: the geometry each can produce barely overlaps, and the honest way to choose is to look at what you want to make rather than at the specifications. A great many people who agonise over this end up owning both, and the ones who are happiest bought the one that suited their first ten projects.
The decision this settles: You have decided to buy a machine that turns a drawing into an object, you have somewhere to put one, and you are choosing which. The two look like alternatives and are better understood as opposites.
Where they genuinely differ
Marked per row rather than overall — “better” only means something relative to a specific dimension.
| Point of difference | 3D printing | CNC routing |
|---|---|---|
| What it can physically makeThe single largest difference and the one that decides most projects. A printer can make a shape with a cavity inside it; a router cannot, at any price. | Almost any geometry, including hollow, internal and overhanging shapesAdvantage here | Anything a spinning cutter can reach from above — no undercuts, no enclosed voids |
| Materials | Plastics, and resin. Strong enough for a great deal and not for everything | Wood, plywood, MDF, acrylic, soft metals. Real structural materialAdvantage here |
| SpeedPeople consistently underestimate this. A router removes material orders of magnitude faster than a printer deposits it. | Hours to days for one part | Minutes to an hourAdvantage here |
| Space and messThis decides it for a lot of people living in flats, and it should. A router is not a spare-bedroom machine. | A desk. Quiet, and the waste is a spool and some supportsAdvantage here | A workshop. Loud, and it fills the room with dust that has published exposure limits |
| Can you leave it running? | Yes, and most people do — overnight prints are normal with sensible fire precautionsAdvantage here | No. Never. A cutter can break, work can come loose, and dust can ignite |
| Cost to a usable resultCheap printers have become genuinely good. Cheap routers flex, and flex cannot be fixed in software. | £200–£500 gets a genuinely good machineAdvantage here | £1,500+ for one rigid enough not to frustrate you |
| How hard the software is | Slicing is largely solved — sensible defaults produce good resultsAdvantage here | CAM is a real skill, and it is where the craft and most of the failures live |
| Risk while running | Hot end and bed, resin chemistry on the resin side. ManageableAdvantage here | Unguarded spinning cutter, thrown workpieces, carcinogenic dust, serious noise |
| Finish straight off the machine | Layer lines, almost always needing work if appearance matters | Often ready to sand and finish as woodworkAdvantage here |
3D printing
Somebody in a flat or a spare room, making functional parts, prototypes, models or anything with complex internal geometry — and anybody who wants to start this month for £300
A printer is quiet, tolerable indoors, cheap enough to be a low-risk decision, and capable of shapes no subtractive process can produce at all. It is also the far easier machine to get a good first result from, because slicing software has largely absorbed the expertise that CAM still demands of you.
More on 3D printingCNC routing
Somebody with a garage or workshop who wants to make things out of wood — furniture parts, signs, jigs, templates, boxes — at a size and in a material a printer cannot touch
A router cuts real material fast and produces parts that are structural rather than representative. The price is a genuine workshop: extraction that works, hearing protection, a machine you cannot leave alone, and CAM skills that take months rather than an afternoon. Nobody should buy one for a bedroom.
More on CNC routingBoth are the same workflow — draw it, tell the machine how to make it, run it — and the CAD half is identical and transferable. That is worth knowing before buying either, because the drawing skill is free to learn, is most of what stops beginners, and tells you fairly quickly whether you enjoy the thinking that both machines require.
Both also share a software culture that came out of the same open-source convergence, and both punish the same habit: copying settings from a forum without understanding which machine they came from. And in both, the people who get the most out of the machine are the ones who make things for a reason rather than the ones who bought it to see what it could do.
Sources for this section
- Wood dust (opens in a new tab) — Health and Safety Executive · Governing body · read — supports the claim
Last reviewed 2026-08-14. HobbyHQ does not declare a winner in comparisons — why.