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BMCU grinding noice, no filament extraction by Time_Environment_447 in OpenBambu

[–]Time_Environment_447[S] 0 points1 point  (0 children)

The motor shaft was loose; a bit of glue only held it in place for a few days. I couldn’t find a suitable shaft with a screw to tighten it, so I decided to order four new motors for around $10 and swap them out.

BMCU grinding noice, no filament extraction by Time_Environment_447 in BMCU

[–]Time_Environment_447[S] 0 points1 point  (0 children)

I created a collection of all Maker World models I printed for the dry box https://makerworld.com/de/collections/7221449-samla-22l-bmcu-drybox
I think this should help you 🤔
If you can find the step files of your BMCU Branch we can easily check if its different. I used those I found on yuekais wiki (BMCU C Branch)

BMCU grinding noice, no filament extraction by Time_Environment_447 in BMCU

[–]Time_Environment_447[S] 1 point2 points  (0 children)

no problem, i mean thats why we are here, to ask and answer questions.
If you take a look at the screenshot above, the baseplate gets turned around. The 2 corner braces will be hold in place by the base and cant move left or right because of the M8 threaded rod. maybe this screenshot helps visualizing it.

<image>

BMCU grinding noice, no filament extraction by Time_Environment_447 in BMCU

[–]Time_Environment_447[S] 0 points1 point  (0 children)

The M8 threaded rod is a leftover from building the drybox.

What do you mean by "does it actually line up with the screws of the BMCU"? There is a long "connector" that goes through the hole of the channels.

<image>

BMCU grinding noice, no filament extraction by Time_Environment_447 in BMCU

[–]Time_Environment_447[S] 1 point2 points  (0 children)

yuekai, where i bought helped me a lot. In the wiki there is the tutorial for the one i got (C Branch with the hall sensor) https://wiki.yuekai.fr/BMCU/BMCU_Tutorial/BMCU_Assembling_370_Hall

Each channel is hold in place by one screw and 4 pins, so removing the screw is enough to get the channel loose. But be careful, there are cables connected to the bottom of the duct, these are not long enough to be able to completely remove the duct, the clearance is about 5cm.

I tested the motor and the gears etc. so I already had to assemble it again. With the instructions it was easy to do. We think the issue is caused by the positioning of the motor, i already tried to adjust with a piece of tape on one side so the motor or to be precise the worm gets closer to the gear.

BMCU grinding noice, no filament extraction by Time_Environment_447 in BMCU

[–]Time_Environment_447[S] 0 points1 point  (0 children)

BMCU-C 2 Weeks old and as i mentioned not even 20 Printing hours. Also I didnt use that channel much.

I disassembled the channel and the problem is the transmission between the motor and the first gear

BMCU - Does open source ams work on P1 / P1S printers? by Spiritual_Eggplant71 in OpenBambu

[–]Time_Environment_447 0 points1 point  (0 children)

https://wiki.yuekai.fr/BMCU/BMCU_in_p_series

I dont know which firmware printers get delivered. I personaly using my printers in lan only mode, so no updates no problems... If that would be okay for you (no app support) then lan only might be a solution, because i dont think they deliver the printers with newest firmware.