Multijet 3D Printing vs FDM: Which Technology Is Better?

3D printing has become an important part of modern product development, prototyping and manufacturing. Among the many 3D printing technologies available today, Multijet and FDM are two popular options. Both technologies can transform digital designs into physical parts, but they use different printing processes and offer different advantages. Choosing between them depends on factors such as accuracy, surface quality, material requirements, production volume and budget.

For businesses looking for detailed prototypes, multijet 3D printing can deliver excellent accuracy, intricate features and smooth surfaces. FDM, meanwhile, is widely recognised for its affordability, material flexibility and ability to create functional components. Understanding the differences between these technologies can help businesses select the right solution for their projects.

What Is Multijet 3D Printing?

Multijet 3D printing is an additive manufacturing process that creates parts by depositing tiny droplets of photopolymer material layer by layer. The material is cured during the printing process, allowing the system to build highly detailed and complex models.

One of the biggest advantages of this technology is its ability to reproduce small features and intricate geometries with a high level of detail. It is commonly used for rapid prototyping, product design, engineering models, presentation prototypes and applications where appearance and precision are important.

Multijet systems can also produce smooth surfaces that require less post-processing compared with some traditional extrusion-based printing methods.

What Is FDM 3D Printing?

FDM, or Fused Deposition Modeling, is one of the most widely used forms of 3D printing. It works by heating a thermoplastic filament and depositing it through a nozzle in successive layers until the complete object is formed.

Common FDM materials include PLA, ABS, PETG, TPU, nylon and other engineering plastics. Because of its wide material availability and relatively low operating cost, FDM is suitable for prototypes, mechanical parts, jigs, fixtures, educational models and low-volume manufacturing.

FDM printers are available in desktop, professional and industrial configurations, making the technology accessible for businesses of different sizes.

Multijet vs FDM: Print Quality

Print quality is one of the most important differences between the two technologies. Multijet generally offers finer detail and smoother surface finishes. Its ability to deposit very small amounts of material makes it suitable for models with complex features, thin walls and detailed textures.

FDM can produce accurate parts, but visible layer lines are often present, especially on curved surfaces. Additional 3D printing post-processing, such as sanding or smoothing, may be necessary when a polished appearance is required.

Therefore, Multijet can be a better option for visual prototypes and highly detailed models, while FDM is often sufficient for functional components.

Accuracy and Complex Designs

When producing intricate components, dimensional accuracy and detail reproduction are important. Multijet technology is well suited to applications where small features and complex geometries must be represented accurately.

FDM can also handle complex designs, but its performance depends heavily on nozzle size, layer height, print orientation, material and printer settings. Support structures may also be required for certain geometries.

For highly detailed 3D printed prototypes, Multijet can therefore provide an advantage, particularly when the prototype needs to closely represent the final product design.

Material Selection

FDM has a significant advantage in terms of material variety. Users can select from numerous thermoplastics with different mechanical, chemical and thermal properties. This makes FDM particularly useful for functional prototypes and components that need to withstand everyday use.

Multijet systems generally use specialised photopolymer materials. These materials can offer different characteristics, including rigidity, flexibility, transparency and visual appearance, depending on the specific system.

The best choice therefore depends on whether the project prioritises visual quality and detail or specific engineering material properties.

Cost and Production Considerations

The overall 3D printing cost varies depending on the machine, material, part size, complexity and production volume. FDM is generally considered a cost-effective solution because filament is widely available and many FDM machines have relatively low operating costs.

Multijet printing can cost more because it uses specialised equipment and materials. However, the additional cost may be worthwhile when a project requires superior detail, smooth surfaces and reduced finishing work.

Businesses should evaluate the total project cost rather than comparing material prices alone. Faster development cycles and fewer design iterations can also provide significant savings.

Which Technology Is Better for Prototyping?

Both technologies are valuable for rapid prototyping, but their strengths are different.

Multijet is a strong choice for:

• High-detail prototypes

• Smooth and professional surfaces

• Complex product designs

• Presentation models

• Fine features and intricate components

• Product design validation

  
  

FDM is better suited for:

• Affordable prototypes

• Functional components

• Larger parts

• Mechanical testing

• Jigs and fixtures

• Low-cost design iterations

  
  

The intended purpose of the prototype should therefore guide the technology selection.

Multijet vs FDM for Manufacturing

FDM is often preferred for low-volume manufacturing when durable thermoplastic parts are required. Industrial FDM systems can produce strong components from engineering-grade materials and are useful for custom manufacturing applications.

Multijet is more suitable when manufacturing requirements focus on fine details, complex shapes and appearance. It can be particularly useful during product development before transitioning to injection moulding or another traditional manufacturing method.

Companies using additive manufacturing should consider factors such as production volume, part function, required tolerances, material properties and finishing requirements before selecting a process.

Conclusion

So, which technology is better: Multijet or FDM? There is no universal answer. Multijet is generally the better choice for highly detailed prototypes, smooth surfaces and complex designs. FDM is often the more practical option for affordable functional parts, larger components and applications requiring a broad range of thermoplastic materials.

The right choice ultimately depends on your project's requirements. By considering accuracy, surface finish, materials, cost, part size and intended application, businesses can select the most suitable 3D printing service for their product development and manufacturing goals.