SLA versus FDM
RED CREEK, NEW YORK, USA, August 29, 2022 /EINPresswire.com/ — The variety of 3D printers currently on the market makes it difficult to select the best one for a given task. The problem is made more difficult as 3D printers improve and become more accessible.
FDM 3D printer
FDM (Fused Deposition Modeling) is classified under the material extrusion category of 3D printing technology. To produce three-dimensional objects, an FDM printer uses a filament made of a thermoplastic polymer. Scott Crump, co-founder of Stratasys, created and patented this technique in 1989.
Filament is pushed into the hot extruder of an FDM printer. The filament is heated and dropped through the nozzle onto a build platform in a layer-by-layer process to create the finished object.
SLA 3D printer
SLA (Stereolithography Apparatus) is a type of 3D printing technology that uses vat light curing. In the mid-1980s, American engineer Charles Hull created the first ever patented 3D printing technology.
The SLA 3D printer prints objects using a liquid resin material. In this method, the 3D object is created using a powerful laser. The vat of liquid thermosetting resin in this method has a laser source at the bottom of it. When the liquid photoresist is exposed to the laser, it is selectively flashed, hardening (hardening) the substance. It is continued in this manner until every place in the layer has been exposed and hardened. Once complete, the procedure moves to the next layer and then to the next
See below ; A comparison to choose the right 3D printer
The comparison information provided here will help the user select the right 3D printer for their use and needs.
FDM: When comparing the materials of the FDM versus SLA, various thermoplastic polymers, as well as composites in the form of filament, are used by FDM printers. Since basic thermoplastic materials are cheap, filaments are the same price all over the world and are also quite affordable. Depending on the type and gauge of filament, the cost of one kilogram of 3D printing filament can range from $24 to $99.
SLA: A smaller selection of materials is available for 3D printing on SLA printers. SLA uses photosensitive thermosetting polymers based on liquid resin. The price of resin can vary from $100 to $200 per liter, depending on the type and quality of the material. The majority of SLA printer manufacturers make expensive resins.
These materials are incredibly specialized and are used in a variety of applications including dentistry, jewelry, strength, high temperature, and more.
COLORS AND BLENDS
FDM: The range of colors offered by FDM corresponds to the material available. Any type of material can be mixed with colorants to produce a wide range of colors, allowing designers and engineers great versatility. Many different material suppliers also offer a variety of colors, and some manufacturers even offer custom color matching for picky customers.
SLA: SLA materials are often available in black, gray and translucent and do not offer a wide color gamut. However, since all SLA materials are blended versions of the original base material, they can all be used in application-based materials. Although colors are often limited, however, in some cases experimenters can mix their own pigments to generate a variety of colors, but this can be a difficult procedure.
FDM: Due to the minimum layer height, the surface finish produced by FDM printers is coarse and layer lines are easily visible. The thickness of the line, seen from above, is typically around 400 microns (the bead resulting from the diameter of the nozzle).
Resolution or layer height refers to the ability to change the thickness of the side view line, which is usually adjustable between 50 and 400 microns.
SLA: SLA printers use a laser to “draw” every line on the part, allowing for much finer, more precise lines that produce a smooth surface finish. The lines created by the laser and their hardened counterparts are about 20 microns wide.
FDM: For larger features, FDM 3D printing achieves good dimensional accuracy. Dimensional accuracy is compromised and even inconsistent for small features. Depending on the type of 3D printer (DIY, desktop, professional or industrial FDM printer), this can also be hampered. Choosing the right 3D printer becomes difficult because accuracy also depends on the calibration and settings of the slicer. Due to their shrinkage characteristics, materials also affect accuracy. The MakerBot method, an example of an accurate 3D printer, uses a special heated build chamber to allow for a high degree of dimensional accuracy.
SLA: The dimensional accuracy of an SLA printer is unmatched by the majority of other 3D printing technologies due to its ability to produce extremely fine resolution. SLA is a fantastic option if the primary objective is surface polishing and fine detail accuracy (as in jewelry or dentistry).
FDM: Due to their ability to print in well-known polymers and composites, FDM printers generally have an advantage when it comes to generating strong, useful, and durable parts. For example, printing in nylon carbon fiber will allow the production of a lightweight component with exceptional strength.
SLA: SLA printers are generally recognized for producing delicate and detailed parts rather than robust parts. Several factors cause this. For starters, cured resins are often quite fragile. Another issue is that unlike FDM prints, solid parts cannot be produced with SLA as they will fracture, warp and often lead to print failure.