Why Choose SLS 3D Printing Over FDM 3D Printing?
Selective laser sintering (SLS) and fused deposition modeling (FDM) are two types of additive manufacturing (AM), otherwise known as 3D printing. Both are regularly employed for rapid prototyping and low-to-medium-volume production. SLS machines methodically fire a laser to sinter the particles of a polymer-based powder to build parts layer-by-layer. On the other hand, FDM machines melt and extrude a polymer filament through a nozzle, depositing it along a prescribed path to form parts layer by layer. While the two types of AM have many similarities, their differences will determine whether SLS vs. FDM is better for you.
Primarily, their operational variances set them apart. SLS machines function by selectively fusing layers from a bed of powder. This unique approach obviates the need for dedicated support structures, as the powder base inherently sustains part features during the printing process. Consequently, SLS facilitates the fabrication of intricate geometries, interior features, and undercuts with commendable precision. Post-processing for SLS remains relatively straightforward, typically involving a brief cleaning step subsequent to removal from the build chamber. Notably, SLS-produced parts boast excellent mechanical properties akin to those of plastic-injected parts. However, these advantages come at a substantial cost, with even entry-level SLS machines commanding significant investment. Conversely, FDM presents a more economically viable option, particularly for the fabrication of larger parts. Despite potential disparities in resolution and detail, FDM can still achieve comparable production speeds.
The choice between SLS and FDM hinges on various factors, including desired part intricacy, material properties, and budgetary considerations. While SLS excels in producing intricate parts with exceptional mechanical properties, FDM offers a more accessible entry point to additive manufacturing, especially for projects prioritizing cost-effectiveness and scalability.
