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There are many parts to 3D Printers, and it’s important to know the names of those parts when upgrading or replacing components, and for general troubleshooting. Below is a diagram of an Ender 3, but most 3D Printers are generally the same.
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Hotend Assembly: The hotend assembly usually contains three main components; the hotend, part cooling fan, and the hotend cooling fan.
Hotend
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The hotend is exactly as it sounds, and is the piece that melts the plastic, and where it is extruded from.
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USB and SD Ports
The USB and SD Ports are the interface for feeding gcode (tells your printer what/how to print) to the printer. You can upload a file to a micro SD card and insert it into the printer, or print directly from a computer plugged in via the USB port.
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A printer such as the Ender 3 or CR-10 is known as a XZ hotend and Y bed printers. This means the hotend assembly moves along the X and Z axis (left/right and up/down), while the bed moves forwards and backwards on the Y Axis.
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