The CR-30 is a unique 3D printer from the manufacturer Creality that is designed specifically for printing long objects or prints that require continuous printing without interruption. It is also known as the "infinite-z" 3D printer because it uses a conveyor belt to continuously feed the printing surface through the printer. The CR-30 features a sturdy aluminum frame and a heated build plate, like many other 3D printers, but what sets it apart is its unique conveyor belt system. This allows users to print objects that are longer than the build volume of the printer, as the belt continuously moves through the printer and the object is printed on top of it. One of the key advantages of the CR-30 is its ability to print long objects without the need for manual intervention or stopping and starting the printing process. This makes it an ideal option for printing objects such as signs, banners, and other long or continuous prints. The CR-30 also comes with a number of features that make printing on a conveyor belt easier, such as an adjustable belt tensioner and a belt cleaning system. Additionally, it has a filament runout sensor and an auto-resume function, which help to ensure that prints are completed successfully, even if there are interruptions or issues during the printing process. Another advantage of the CR-30 is its versatility. It can print with a wide range of materials, including PLA, ABS, PETG, and TPU, making it a great option for creating objects for a variety of applications. Overall, the CR-30 is a great option for those who need to print long or continuous objects without interruption. While it may not be as versatile as other 3D printers, its unique conveyor belt system makes it a valuable tool for many applications, particularly in the signage and advertising industries.