Here's my new mount for the Bondtech BMG / E3D v6.
Again, it's a universal mount, you'll need to do some work to adapt it to your printer. I've included the entire STEP-file for you to tinker with.
This is NOT a print'n'plug'n'play-solution, please keep in mind that you'll need to design some more parts.
Water test video:
Fan is turned on around 10 seconds into the video, pay attention to the oozed bit of filament to see the water bulge downwards. The fan isn't the most powerful one, need to replace it soon. Works fine though.
I've included a lot of screenshots from my CAD, this should explain pretty much everything. The mount only consists of two parts (minus the bracket), those two parts do all the work:
- hold the extruder assembly and secure it against rotation around Z (pretty much just clips into place)
- hold the hotend and secure it against movement against X and Y
- hold the cooling fan and the part cooling fan
- provide air cooling channels to cool the part (all internally - you can see the two channels highlighted in two of the screenshots)
I also tried to have a mount that ensures great visibility and accesibility to the nozzle, as well as a relatively big distance between the hotend and the mount. This to ensure that at least some insulation between those parts is happening. Yes, the silicone sock is mounted backwards, this was intentional to further insulate the mount from the hotend.
Part cooling seems to be pretty effective, have a look at the video. I suggest to seal the edges of the radial fan with some electrical tape, otherwise a lot of air goes missing.
A pretty substantial amount of design-time was spent on matching the visual design aspects of the mount to the BMG extruder. This is pretty subjective of course.
The two parts print easily without supports - I've spent quite some time making sure that all internal features are overhangs wherever possible - or, if not possible, that bridges are as small as possible.
I suggest printing in PETG or ABS or some high-temperature PLA. I printed this with a 0.12mm layer height and a 0.3mm nozzle. The parts are (somewhat) optimized for this, nonetheless, they should print fine with a thicker nozzle and bigger layer height.
What you'll need additionaly:
- the aluminium bracket - or some other thing to mount it to your carriage
- 40mm cooling fan
- 50mm radial fan
- 4 spacers Ø8 / Ø4 / 5mm high (to give some space for the cables to feed through between the mount and the aluminium bracket)
- 4 socket head cap screws M3x12 (to mount the first part onto the bracket)
- 1 countersunk screw M3x6
- 2 socket head cap screws M2x12
- 4 socket head cap screws M3x10 (for the 40mm fan)
- 1 socket head cap screw M4x20 (for the radial fan)
Please make sure that the mating surfaces of the prints are straight and fit together nicely, otherwise air will escape. You can use electrical tape so close some gaps if you need to. Also, pelase make sure that your printer is capable of doing pretty tight tolerances as well as clean and sharp edges, otherwise you'll run into problems mounting the extruder assembly.
Please feel free to modify this to your liking, I'd love to hear from you.
Although this might sound a little prick-ish, but please don't ask me to adapt this design to your specific needs for you. I really don't have the time in doing so. If you need help adapting it, then feel free to contact me.