FDM vs. Resin Printing

Attribute	FDM	Resin Printing
Technology	Fused Deposition Modeling	Stereolithography
Material	Thermoplastic filaments	Photopolymer resin
Layer Resolution	Lower resolution	Higher resolution
Speed	Slower printing speed	Faster printing speed
Post-processing	Requires support structures	Requires UV curing

Introduction

When it comes to 3D printing, there are several different technologies available, each with its own set of advantages and disadvantages. Two popular methods are Fused Deposition Modeling (FDM) and Resin Printing. Both techniques have their own unique characteristics that make them suitable for different applications. In this article, we will compare the attributes of FDM and Resin Printing to help you understand which method may be best for your specific needs.

Cost

One of the key factors to consider when choosing between FDM and Resin Printing is the cost. FDM printers are generally more affordable than resin printers, both in terms of the initial purchase price and ongoing maintenance costs. FDM printers use thermoplastic filaments, which are relatively inexpensive compared to the liquid resin used in resin printers. Additionally, FDM printers do not require specialized equipment such as UV curing chambers, which can add to the overall cost of resin printing.

Print Quality

Print quality is another important consideration when comparing FDM and Resin Printing. Resin printers typically produce higher resolution prints with smoother surfaces and finer details compared to FDM printers. This is because resin printers use a liquid resin that is cured by UV light, resulting in more precise and accurate prints. FDM printers, on the other hand, extrude molten plastic layer by layer, which can result in visible layer lines and rougher surfaces.

Speed

When it comes to speed, FDM printers have the advantage over resin printers. FDM printers can typically print objects faster than resin printers, especially when printing larger objects. This is because FDM printers extrude material continuously, while resin printers cure each layer individually, which can take longer. However, resin printers are catching up in terms of speed with advancements in technology, so this difference may become less significant in the future.

Materials

Another important factor to consider is the range of materials that can be used with FDM and Resin Printing. FDM printers are more versatile in terms of materials, as they can use a wide variety of thermoplastic filaments such as PLA, ABS, PETG, and more. Resin printers, on the other hand, are limited to using liquid resin, which may have specific properties such as being brittle or flexible. However, resin printers are starting to offer more options in terms of resin types, including flexible and tough resins.

Post-Processing

Post-processing is an essential step in 3D printing to achieve the desired finish and functionality of the printed object. FDM prints typically require more post-processing compared to resin prints. FDM prints may need to be sanded, primed, and painted to achieve a smooth finish, while resin prints may only require minimal post-processing such as removing supports and curing under UV light. However, resin prints may be more fragile and require additional post-curing to strengthen the final object.

Applications

Both FDM and Resin Printing have their own set of applications where they excel. FDM printing is well-suited for functional prototypes, architectural models, and large-scale objects due to its speed and cost-effectiveness. Resin printing, on the other hand, is ideal for producing high-detail models, jewelry, and dental applications where precision and smooth surfaces are essential. Each method has its strengths and weaknesses, so the choice of printing technology will depend on the specific requirements of the project.

Conclusion

In conclusion, FDM and Resin Printing are two popular 3D printing technologies with their own unique attributes. FDM printing is more cost-effective and versatile in terms of materials, while resin printing offers higher resolution prints with smoother surfaces. The choice between FDM and Resin Printing will depend on factors such as cost, print quality, speed, materials, post-processing requirements, and the specific application. Both methods have their own strengths and weaknesses, so it is essential to consider these factors carefully when choosing the right 3D printing technology for your needs.