While most modern 3D printers are based on established designs, the Lemontron stands out with its unusual concept. This open-source 3D printer uses an inverted printing geometry where the print bed is mounted upside down. Although this approach does not offer any significant technical advantages, it enables a compact design and stands out visually from conventional printers.
The design of the Lemontron is a further development of the Positron 3D printer, which already attracted attention with its compact design and innovative kinematics. The developer of the Lemontron placed particular emphasis on simplifying the design for do-it-yourself construction. The target group are makers who were inspired by the Positron but were put off by its sophisticated design.
The materials list for the Lemontron is comprehensive and well documented. In addition to standard components such as a Raspberry Pi Zero 2 W and an SKR Pico controller board, it also includes specific parts such as the Positron V3.2 hotend, which extrudes filament at a 90-degree angle. The estimated total cost is around 400 US dollars. Since no kits are available, all components must be procured independently and the necessary parts must be manufactured on another printer.
A key advantage of the Lemontron is its space-saving design. When folded, the printer fits into a standard 1 kg filament spool package, making it ideal for limited workspaces. The build process is described in detail in an in-depth video that provides insights into the assembly and the underlying design philosophy. The design relies on easily accessible standard parts to make assembly as practical as possible for makers.
Further details such as instructions, downloads of the model files and a list of materials can be found on the developer’s official website.
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