Bondtech BMG Extruder Carriege for Prusa i3 MK3

thingiverse

Due to inconsistent extrusion from the mk3, among other issues found on github issue #602, we decided to switch to a spanish telegram group. Installing a whole bondtech BMG might ease this problem. Apparently it does (I haven't tried it yet). The e3d now sits on the BMG, so the entire extruder body needs to be changed. If installed with a pancake motor, you can keep the nozzle fan from prusa, but with the prusa motor there's not enough space, so I replaced the nozzle fan for those who don't want to change it. It's not pretty, but couldn't figure something else. The e3d and pinda sensor are in the same place as the original extruder body. Only the steps of the extruder motor need to be changed using pronterface to the new 3:1 gear ratio - around 830 if I'm not mistaken. I'll update this with links to the motors and e3d designs that helped me design this when I find them, along with any other relevant info. It's saturday now, and rather be playing assassins odyssey XD. Invertedseed and Santi, thank you for all the tests! UPDATE: Extruder body and cover changed. No need for supports and smaller m3 nut holes to keep the nut in, as in the mk3 build, use a screw to get them in. And uploaded step files. UPDATE 2: Chris Warkocki pointed out that there's no reason to have access to the filament sensor for cleaning purposes, being better to just take it out when you need to, so I closed that hole as he did in his zaribo mod. Changed the square nut that is inserted from the side to attach the x-carriage for a hex nut in the body as he did in his modification because honestly works way better. Asked him if he didn't mind if I brought those changes to my design, so don't worry he's aware. Also fixed some errors that I missed and he pointed out. Nothing serious that would affect performance, so if you already have printed it don't worry. Changed the nozzle fan for prusa motor too. It should be easier to print. New parts are: - Extruder Body v2 - X-carriage v2 - Fan keeping prusa motor v2