3d Print technology
3D printing, also known as additive manufacturing, is a process where you create three-dimensional objects by placing layers of material on top of each other. 3D printing has many applications in various fields such as engineering, art, medicine and education. But not all 3D printers are the same. There are different types of 3D printing technologies that use different materials and methods to create objects. In this article we will compare four common types of 3D printing technologies: FDM/FFF, MSLA, DLP and SLS.
FDM/FFF
FDM stands for fused deposition modeling and FFF stands for fused filament fabrication. These are the most widely used types of 3D printing technologies, especially for hobbyists and makers. FDM/FFF printers use a thermoplastic filament as material, which is heated and extruded through a die on a build platform. The nozzle moves along the X and Y axes, while the platform moves along the Z axis, to create layers of the object. FDM/FFF printers are relatively inexpensive, easy to use, and compatible with a variety of materials, such as PLA, ABS, PETG, TPU, and more. But FDM/FFF printers also have some limitations, such as low resolution, poor surface quality, curvature and support structures.
MSLA
MSLA stands for masked stereolithography apparatus. This is a type of resin-based 3D printing technology that uses an LCD screen as a mask to selectively expose a layer of photopolymer resin to UV light. The resin hardens where the light hits it, forming a layer of the object. The build platform then moves up or down to expose the next layer of resin to the light. MSLA printers can produce high resolution and smooth surface objects with fine detail. But MSLA printers also have some drawbacks, such as high cost, limited material choices, toxic fumes, and finishing requirements.
SLS
SLS stands for selective laser sintering. This is a type of powder-based 3D printing technology that uses a laser to fuse together particles of a thermoplastic or metal powder. The powder is spread in a thin layer over a construction platform by a roller or blade. The laser scans the cross section of the object and melts the powder where solid material is desired. The platform is then lowered by a layer thickness and more powder is spread over it. The process is repeated until the object is complete. SLS printers can produce strong and complex objects with high accuracy and without the need for support structures. But SLS printers also have some challenges, such as high cost, high temperature, large size and finishing requirements.