FDM technology is a technique in which a filamentary, hot-melt material is heated and melted while a three-dimensional printhead, under computer control, selectively applies the material to the table based on cross-sectional contour information.
After a layer of molding is completed, the machine table descends one height (i.e., the layering thickness) and then molds the next layer until the entire solid shape is formed. It has a wide variety of molding materials, high strength and high precision molded parts, and is mainly suitable for molding small plastic parts.
Fused deposition, also known as fused filament deposition, is a filamentary hot-melt material is heated and melted, and is extruded through a nozzle with a microscopic nozzle. The molten hot melt material is ejected from the nozzle and deposited onto the fabrication panel or the previous layer of cured material, which begins to cure at a temperature lower than the curing temperature, and the final product is formed through the accumulation of layers of material.
Among 3D printing technologies, FDM has the simplest mechanics, the easiest design, and the lowest manufacturing, maintenance, and material costs, making it also the most used technology in desktop-class 3D printers for home use.
Expanded Information
The advantage of FDM technology is that it is simple and inexpensive to manufacture, but desktop-level FDM printers, due to the simple structure of the discharge, it is difficult to accurately control the shape of the material and molding effect, while the temperature has a very big impact on the FDM molding effect, and desktop-level FDM 3D printers usually lack The desktop FDM 3D printers usually lack the constant temperature equipment.
The finished product accuracy of FDM-based desktop 3D printers is usually 0.3mm-0.2mm, with a few high-end models able to support a layer thickness of 0.1mm, but the effect of temperature is very large, and the finished product is still not stable enough.
Additionally, most FDM models have a "step effect" at the edges of the product, which makes it difficult to achieve a WYSIWYG 3D printing effect, so FDM is less commonly used in rapid prototyping applications that require higher precision.
Baidu Encyclopedia - FDM Technology