Direct Drive Mount for BMG Extruder - Ender 3

thingiverse

I needed to mount my BMG clone extruder in a Direct Drive configuration using a 20mm stepper motor. I needed to change a few things from the original. 1. Move the motor further forward to avoid hitting the Z-axis support. 2. Move the motor mount holes slightly higher because now the boden tube exiting the bottom of the extruder is not directly above the entry to the hotend. I needed a little more room to avoid kinking the tube and I didn't want to change the position of the hotend. 3. Add a bit more material around the mounting holes where the aluminium sleeves get pushed in. By design these have to be a very tight fit and I was worried about the PLA cracking when I hammered the sleeves in. I also adjusted some of the support material as I was only printing the part in PLA and wanted to be sure of zero flex and was concerned about deformation due to heat. The original is a great design and all credit should go to it. This is only adjustments to that design to suit my own needs. **Note:** 5/03/2020 Updated the design by slimming it down some more to remove excess weight and bulk. I found that is was still very strong and didn't flex even with the reduced size. Bonus is that it also prints quicker too. If you use this on your printer I would love feedback on how well it worked for you.