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MK8 Extruder Bondtech BMG Adapter

by xLORDxSIDIUSx Jul 7, 2019
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Darius, thank you for making the modified version!

how do you attach this to the x-carriage? do you have a specific carriage to mount this to?

This just allows you to use cheap hotends on a BMG extruder. Mounting the actual BMG is a different thing entirely. However, i have seen so many BMG to rail adapters on It will really depend on your printer. https://www.thingiverse.com/thing:3700039

Anet A8 BMG Conversion Adapter
by evolwun

I had same idea. Thank you, you saved my time for designing. My suggestions about further improvements are:
1/ make hexagonal part as short as possible.
2/ Let the ptfe tube go right through the whole adapter just to constrain the flexible filament even between the adapter and the BMG body (there is some space).

I will use BMG + your adapter + MK8 + volcano + big nozzle on big printer. Best setup ever!

I can mod it... plus I will upload the step/fusion 360 file.... thanks for the suggestions.

Thank you! Marco's version of self-printed BMG-clone (https://www.thingiverse.com/thing:3235716) looks best for me, especially for printing with flexible filaments. So it would be great to have adapter sitting tight in this version with ptfe tube going right through the adapter as far as possible. I am going to have swap-able hotends (with 4.1 heatbreak and full metal).

Bondtech BMG MarcoZ76 Edition

why did you choose the Marco version over the others? have you printed/built this yes? I am thinking of doing the same thing on a second printer now.

For me the most important part of the bmg-body are the holes (filament guides) near gears. As you can see on the 4-th picture from top on the page
this is very well done in the Fysetc clone. Filament has no way to escape. Two pics lower you can see same place in Tranglelab clone. Makers report that they can't print flexible filaments with it because it gets clogged. (see pics on same page in the discussion part). Marco's design looks most promising for me to prevent clogging. It is more like Fysetc in this sense.
Also be aware that threads on Fysetc gears are too wide. They look like they are designed for 3 mm filament. I have ordered the Trianglelab gears because they are narrower. (See even lower pictures on same page).
I did not print yet, waiting for gears to come by mail. If it would not be optimal we may try other versions.
P.S. Today I've got gears from Trianglelab. They have narrow threads as was described above. Let's start experimenting printing extruder bodies.

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