FDM stands for Fused Deposition Modeling and is the best-known 3D printing process: a plastic filament is melted and built up layer by layer into a part. The basic principle is simple, but what’s possible with it today goes far beyond that. I manufacture actual parts for your project as part of Prototyping or Small-Batch Production – this page is meant to explain what FDM can do today.
How FDM has developed in recent years
A few years ago, FDM was mostly known for simple, often visibly layered models. That has changed considerably:
- Precision and surface quality have improved significantly through better mechanics, heated chambers and finer nozzles
- Material variety has grown enormously – from simple standard plastics to technical high-performance materials
- Process reliability has increased: enclosed, temperature-controlled build chambers now allow demanding materials like ABS, ASA or nylon to be printed without warping
- Multi-extruder systems make it possible to combine several materials or colors within a single print job
What used to be a pure prototyping tool has become a serious manufacturing process for functional parts.
What’s possible today
The biggest leap of the last few years is the ability to combine materials within a single part:
- Multi-material printing: several filaments are used within the same part – for example a rigid base structure combined with soft, rubber-like elements for grips or seals
- Targeted property combinations: by joining different materials in one part, you can achieve properties no single material could offer on its own – stiffness where it’s needed, flexibility elsewhere
- Fiber-reinforced filaments: carbon- or glass-fiber-reinforced plastics achieve a stiffness-to-weight ratio far beyond classic plastic parts
- Soluble support structures: support materials that dissolve in water make complex, undercut geometries possible that used to be nearly impossible to print
- Technical high-performance plastics: materials like PA-CF, PETG-CF, and even high-temperature plastics bring FDM parts closer to metal replacement in mechanical applications
Where the process is headed
Development is clearly moving toward even finer material combinations and more functional integration directly in the print: parts with deliberately varying stiffness across their geometry, embedded conductivity for simple sensing, wider availability of high-performance polymers like PEEK outside large industrial machines, and improved recyclability of the materials used. FDM keeps moving further from “prototype” toward “end-use part.”
FDM compared to SLS
SLS (Selective Laser Sintering) has its own strengths – support-free production of complex geometries and very consistent mechanical properties among them. But FDM has plenty to offer in comparison:
- Cost efficiency: no powder handling, no complex machine infrastructure – considerably more economical for single units and small batches
- Material breadth: from flexible TPU parts to fiber-reinforced high-performance plastics, FDM covers a wider material range, including multi-material combinations in a single part
- Larger parts: FDM machines often offer larger build volumes than comparable SLS systems
- Simpler post-processing: no leftover powder, no cleaning required in enclosed systems
- Shorter lead times: especially for single parts and small quantities, FDM is usually ready to start faster
- Targeted stiffness by load direction: print orientation can be aligned with a part’s main load direction – in that direction, fiber-reinforced FDM parts can achieve higher stiffness than an isotropic but, on average, more moderate SLS part
- UV-resistant materials: ASA offers a weatherable, UV-stable material for outdoor use that’s hard to match with SLS powder materials in this form
- Surface quality: fine layer heights combined with targeted post-processing can produce smoother, less porous surfaces, whereas SLS parts inherently have a slightly grainy, matte surface from the powder
- No powder aging effect: with SLS, reused powder changes color and properties over multiple build jobs – with FDM, fresh filament delivers consistent results from part to part
- No minimum wall thickness from powder removal: since FDM doesn’t require powder to be removed from cavities, delicate, fully enclosed hollow structures are possible without depowdering holes
SLS remains the better choice for certain applications – but for most projects at SMEs and start-ups, FDM is often the more economical and flexible solution today.
What this means for your project
Whether it’s a single prototype or a small batch: I’m happy to advise you on which material combination makes sense for your part. Actual production then runs through Prototyping or Small-Batch Production – just get in touch via the request form.