Anycubic I3 Mega + E3D Hemera (Direct Drive)

thingiverse

This is my adaptation of the E3D Hemera extruder on Anycubic I3 Mega as direct drive unit, a project that requires only two major components to be printed. These components are relatively easy to print and take no more than 30 minutes each to complete. In addition, three other simple prints are required: two tensioners, a bracket for the drag chain, and a cover for the PCB board. I have used an E3D Volcano heating block and Igus RJ4JP-01-08 polymer bearings in my adaptation, but these components can be replaced with normal LMU8 or LM8UU bearings and any other type of E3D block. A dedicated fairing for the 5015 blower is also included for use with the E3D V6 heating block. The last minor design evolution and refinements, as well as the complete CAD data, 2d drawing, and hi-res pictures are saved in: https://github.com/Sergiu-I/Ai3M---FoX-50mm-ZX-Axis/tree/CAD-Files. If opening a step file and saving the required models as STL files sounds unfamiliar or is too much trouble, the included models are very good too - they have been fully tested and proven to be satisfactory on several machines. The assembly of the Hemera unit is simple and straightforward. Only 6 screws M3 are needed: 2xM3x16mm for the 5015 turbine blower duct attachment, 2xM3x20mm + 2xM3x35mm for X-belt tension system, all with washers and nuts (M3 of course). The images show all the required information. The installation of the Hemera unit is clearly described here: https://e3d-online.dozuki.com/c/Hemera_Assembly_Guides. It requires 4 screws M3x8 + washers, included in the Hemera kit. The weight impact of this design versus the original AI3M metal solution is minimal, considering the major Bowden to direct drive modification. I could keep all the values for printing speed and accelerations as in the Bowden configuration. Most direct drive solutions I have seen look way more massive and heavier - I cannot really quantify the differences because I could not find any given weight information for these solutions. The design uses and re-mixed geometry from: https://www.thingiverse.com/thing:3537449 (X-belt tension system, cable chain attachment, PCB holder) with small modifications and improvements - thanks again for these excellent solutions. The cable chain from images can be bought or printed: https://www.thingiverse.com/thing:3668667.