BMG Extruder Carriege for Prusa i3 MK3 Short and Bearing Version

thingiverse

I see people getting confused about how the bmg intake should look. There's a picture from the beginning to show it, but I'm not sure if it's clear enough. I have uploaded another one with zoom in so no one can get it wrong. UPDATE: I've uploaded a new version of the extruder body and cover. More tolerance on the e3d heatsink area and bmg area on the extruder cover has been added, along with more room for the down right screw that secures the extruder cover. This should make it less prone to break. The pinda holder is now in 2 parts for easy installation. Finally, all hex nut holes of the extruder body are smaller. Okay, here we go again. Santi, stigma, and invert thought about decreasing the distance from the filament sensor to the bmg, so I decreased it as much as I could. This means the bmg now needs to be installed with just a small PTFE tube flush with the part. There is a picture of how it should be done. The filament sensor sits in a 0.4mm wall, so make sure to activate detect thin walls or set your perimeters at 0.4mm. This wall is most likely not necessary, so if you want to try without those settings, you'll probably be fine. I've removed some material for weight and aesthetics. Also, in the older body, the bmg door opens barely, so I made a little room to make small adjustments inside if needed. Seeing people were asking Bondtech to include the indirect filament sensor, I made a version of my design with the bearing mod by Martin_au for those who might want it. Now, even with perimeters at 0.4mm, there will be holes in the bearing area. In CAD, there is a 0.25mm clearance, so in theory, it should work just fine, but we'll have to wait for the bold ones to try it out. I included versions for zaribo and bear carriages, but I've never used those designs, so they haven't been tested and can't be assured to be correct, but I hope they are. The extruder cover is the same for all versions. The x carriage back is the same for the two variations of the specific version (short, zaribo, bear). For the rest, if you're going with the bearing version, you'll need the x carriage bearing one as well. I think that's all. The distance from filament sensor to the Bondtech gears cannot be smaller with a full bmg, so I hope it helps with the MMU which is the reason for this new body. For the missing piece of the bearing versions, you can download it from Martin_au's thing on Thingiverse: https://www.thingiverse.com/thing:3223513