The BTECH BMG dual drive gear set includes a number of parts such as a 5mm gear set, an idler tensioner assembly (containing a screw spring), two each of MR85 bearings, 20mm shafts, M3X16 BHCs, M3X8 BHCs, M3X14 BHCs and 5x7x0.5mm (IDxODxL) spacers. A motor and assorted printed parts are also provided.
A significant modification that needs to be made is adjusting the E-axis step-up value on the extruder. For instance, the jump value for the Ender3’s E-axis is 691.1. The drive current of the extruder should also be modified to around 0.35A as a safeguard against motor overheating. This adjustment can be done by either altering the voltage to approximately 0.28-0.3V, or by modifying the E-axis drive current in the firmware.
The pulse of the extruder can be modified either through the firmware (‘define default_axis_steps_per_unit {80,80,400,691}’) or via sending a G code that can be issued using slicing software command (‘M92 E691M500’).
