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3D printers and pens usually create prototypes and components directly from computer-aided design (CAD) data sources, using a process called fuse fabrication. Just like using conventional drawing tools, you can also build 3D printers and pens without data sources. To create the design, the 3D printer stacks the layers together on top of the layer of molten material and then hardens them by hardening. Both portable and 3D printers print material in the form of filaments or lines and send them through an extruder in the printhead, just as ink is used in a standard printer. A 3D pen or printer with a single extruder can print with one filament at a time while a printer with a dual extruder can print simultaneously with two different materials or colors. Although the thickness of the print layer can be customized for each print, the thinnest layer that the printer can create is called its maximum resolution. If you choose to print with a very thin layer, more detailed parts will be created, but normally it will take time to print.

3D pen is a wonderful hand-drawn tool for quickly creating 3D objects. This is not a substitute for 3D printers, but it is a great tool. 3D pens are lightweight and easy to carry, so you can design instant vertical graffiti. You can also create a simple prototype of the object later with a full 3D printer. Most 3D pens are attached to the top of the pen using ABS or PLA plastic filaments. These pens use Fusion Deposition Modeling (FDM), which is the same process used in desktop 3D printers. The pen uses a power electric heater with an extruder and a heating element at the nib to melt the ABS or PLA. Depending on the model, the pen heats the plastic at different speeds, so different plastic flow rates can be used.

3D printers and pens usually create prototypes and components directly from computer-aided design (CAD) data sources, using a process called fuse fabrication. Just like using conventional drawing tools, you can also build 3D printers and pens without data sources. To create the design, the 3D printer stacks the layers together on top of the layer of molten material and then hardens them by hardening. Both portable and 3D printers print material in the form of filaments or lines and send them through an extruder in the printhead, just as ink is used in a standard printer. A 3D pen or printer with a single extruder can print with one filament at a time while a printer with a dual extruder can print simultaneously with two different materials or colors. Although the thickness of the print layer can be customized for each print, the thinnest layer that the printer can create is called its maximum resolution.