BMG Extruder Dual Drive Extruder Modification

thingiverse

BMG Extruder Dual Drive Extruder Modification: A. In some of the dual-drive units, there is some deviation between the gears, in my case, I added a 6.5x3.5x0.5mm printed washer (included in the STL file), a suitable metal washer is fine too. B. The original release lever was too strong and short, it was very hard to load and unload filament (you needed 2 hands to release the lever), so I add this printed washer collar combination, plus replacement of a new spring, now it's very smooth and easy for the maneuver. C. Upgrade from the OEM to Dual-drive extruder, you need to adjust the E-Step from the default 93 steps/mm to around 420 steps per mm, in my case with the Eryone ER-20, I made it at 430 steps per mm. For more info and photos please click the following link: https://www.thingiverse.com/thing:4800707 Please advise of any errors and omissions.