The concept behind FDM printers is simple: a plastic filament runs through the nozzle which melts when it comes in contact while being gradually deposited in a structured way on the build platform until the object is finished. This process works by material being melted and extruded through a nozzle to 3D print a cross section of an object each layer at a time. The extruder of the 3D printer is attached to a system with three different axis: X, Y, and Z directions. When the material is melted and extruded, it is deposited in predetermined locations on the 3D printing bed, where it cools and then solidifies. The bed lowers for each new layer and repeats until the object is completed.
Layer height determines the quality of the 3D print. Some FDM 3D printers can have two or more print heads that can print in multiple different colors.
Many brands today are available pre-built like MakerBot and Ultimaker, two of the most popular desktop 3D printers, or can be built using DIY kits or going from the ground up and printing parts to create an FDM 3D printer. Yes, it is actually possible to 3D print your FDM 3D printer.
There is also a certain importance of support structures in filament 3D printing technologies. While 3D printing with FDM technology, support structures are often required. Indeed, some geometries such as overhangs can’t be printed without supports. Support material and rafts are sometimes troublesome to remove cleanly from the object itself.