TronXY P802 Raise Z-Axis

thingiverse

I discovered one major limitation on the TronXY P802 that restricts its build height is the Z-axis motors' placement much lower in the frame than the heat bed or extruder tip. To overcome this, I designed some brackets to replace the original mounts with ones that elevate the motors by 35mm (approximately matching my printer's glass sheet installed bed height). Additionally, I modified certain top pieces for compatibility. This upgrade allows for a maximum build height of up to 275mm from the stock 240mm (my printer reaches about 265mm due to other factors, but still a notable improvement). The installation uses stock lead screws and smooth rods. I have also included top pieces that increase the build height by 75mm, although longer lead screws and rods will be required for this setting (400mm lead screws and 450mm rods are recommended). In the images, you can see 400mm lead screws installed; however, the longer rods are not available yet, so only the 35mm top pieces are currently in use. The top pieces also enable the installation of standard 608 bearings on the lead screws for smoother operation (I sourced mine from old fidget spinners purchased at Target for $0.50). You will likely need to update your printer's firmware to accommodate the new build height. I have installed the latest Marlin version and adjusted the maximum allowed Z height to 300mm, which it should reach when the longer rods are installed. Depending on your printer frame's fit, you may or may not require trimming a small portion off of the pegs on the lower pieces; I measured them as precisely as possible but found that shaving them slightly after printing helped ensure proper insertion into the frame holes. The top screw on the motor mount will no longer be usable, but these brackets fit so snugly with the other two screws that I do not foresee this being a significant issue. Furthermore, I have included a bracket designed to offset the Melzi board by approximately 3 inches. Two of these brackets are required, as they help elevate the board on the frame, allowing your cables to reach depending on their routing configuration.