• 3D PRINTING TECHNOLOGIES •
FUSED DEPOSITION MODELING (FDM)
FDM is the most common type of 3D modeling in used today because it is the cheapest and most user friendly. It uses a heated nozzle to extrude filament materials layer-by-layer until a model forms inside the bed chamber. It can produce some of the hardest models (depending on material used) that in some cases can match in strength the original parts that were manufactured traditionally. However the downside of FDM is it does not produce the most refine or best-looking models coming straight out of the printer, and it may require some light post-processing work to remove some of the rough surfaces or occasional blobs.
STEREOLITHOGRAPHY (SLA)
SLA is the 2nd most common type of 3D modeling in used today. Unlike FDM, SLA produces the smoothest and very detailed 3D models like similar to traditional mold manufacturing process. SLA uses UV laser to cure and form the 3D model inside the liquid vat of resin. But the downside is that it requires post-processing cleaning which is done by a post-processing machine filled with isopropyl alcohol. And, currently the materials used in SLA are not as tough or resilient than those created by other 3D printer technologies; however this may change as the technology progresses.
SELECTIVE LASER SINTERING (SLS)
SLS 3D printing uses similar techniques like the SLA in that it uses a laser to form the model but rather than using a resin liquid, SLS uses powder materials such as nylon. SLS also differs from SLA and FDM in that it does not require printing support materials as the model is being formed. Although, SLS is the more expensive technology than either SLA or FDM, it has better manufacturing scalability and the parts it produces can match or exceed in strength and durability from a part that was traditionally produced in a factory.
FDM
SLA
