D-Bot Bondtech BMG Carriage for E3D Volcano (3 Wheeled Variant)

thingiverse

I wasn't thrilled with my initial BondTech carriage design, so I decided to make some changes. While it seemed to work overall, getting all four wheels lined up and tensioned just right was a challenge. Previously, I had replaced my H-Bar Ends / Guides with these: https://www.thingiverse.com/thing:1930200, also because of alignment issues. It worked as well as I'd hoped, so I decided to modify my carriage using a similar design that seems to work effectively in my tests. I moved the extruder mount 6.2mm to the left, but the Nozzle/Probe offset remains the same since those parts were moved together: X: +30.9 Y: +31.6 --------- I added a cutout and filet to the bottom of the mount so the BLTouch has room to be adjusted upwards if needed. I also adjusted the cable mount slightly to lower the hole where the 3MM nylon filament can be inserted. Finally, I corrected some internal geometry issues in the fan duct as mentioned by StasBronja: https://www.thingiverse.com/thing:4540882 It's worth noting that since everything had to be moved over, none of these parts except the cable holder and BLTouch Mount (which remains unchanged) are compatible with my previous carriage design. ----- Side note: I highly recommend using these spacers for the V-Wheels: https://www.thingiverse.com/thing:1766015 The original design pressed against the bearing walls, making it hard for my wheels to turn at even moderate levels of tension. These spacers are much better.