Large Prusa Clone 3D Printer ~ Green I3 Geni

thingiverse

I started developing the Inmoov robot a few months ago, and while the model was designed for small 12x12cm platforms, assembling tiny components required extensive shaping and abrasive work. Building it on a large 3D printer would greatly simplify the process and save precious time. I opted to construct the printer with a build platform measuring 55x60x50cm. Unfortunately, I couldn't find a bed heater that matched those dimensions, so I purchased a 40x40cm 220VAC model instead. A solid-state relay controls the bed heater's power supply. The platform consists of three distinct layers: the top layer is a 1mm PEI sheet, followed by a 4mm glass mirror, and finally, a 1mm aluminum sheet at the bottom. All layers are securely attached with 3M double-adhesion film. On the underside of the aluminum sheet, I stuck the heater in place. The platform and Y-carriage combined weigh around 3-4kg, which would be too heavy for standard 8mm linear rods. To compensate, I replaced them with 12mm linear rails commonly used in CNC printers. The base is a sturdy plywood board measuring 900x800x16mm. I chose the MKS GEN v1.4 controller board, paired with TMC2130 stepper drivers set to 1.5V. Most of the printable parts are made from ABS material and were either Prusa MK3 or MK2 components. I modified the X-carriage to accommodate a BL-Touch type sensor, while the Z carriage parts were altered to match brass T8 nuts. I've included a comprehensive bill of materials below. The printer functions flawlessly after assembly.