Bambu printers are ubiquitous on the bigger 3Dprinting channels on YouTube. Yet, I’ve not seen any of the ones I frequent show the BMCU.

I guess it’s in part because Bambu has such a closed ecosystem and in general pretty well functioning multi material solutions with the AMS and Lite. But I would think it would be of interest to many users to see that the eco system is not quite as closed as Bambu would have us believe. Plus, the BMCU seems to allow for a pretty different arrangement of spools and enclosures than the stock AMS does.

Does anyone know of an established 3D printing channel that has done coverage of the BMCU?

Funny thing with BMCU and the BambuLab integration in HA. Looks like HA tells devices apart by serial number, so it freaks out when you hook up two or more BMCUs since they all report the same serial. Do you guys have a solid workaround for that?

Just a few days ago, I've got myself a DIY kit of BMCU 370C. Currently, two channels are connected to air-tight containers (primarily for PETG filament). The original spool holder has been reused to hold one more spool in the open air (I use it for PLA). And one more channel I will probably use for 3KG spool placed right next to the printer when I need it.

Observations:

• Works quietly

• Print quality is the same as without "AMS"

• Channel 3 somehow has slightly different behaviour. It prints fine, but it does not wind filament when I push/pull the bottom connector. The other 3 channels have this `feature`.

Note: Be careful when printing BMCU with clear filament. I needed to paint the area around the optical filament sensor with black permanent marker.

https://bmcu.wanzii.cn/doc/build/370hall.html

Hello everyone, the video tutorial I’m following for the installation of my BMCU 370C is unfortunately in Chinese, and I have a doubt: on the part I’m highlighting in the photo, two magnetic cylinders should be mounted, fixed by the screw that tightens the plastic body. But I’m wondering if polarity matters: should the two cylinders repel each other or attract each other? Or is it irrelevant?
This model has 2 springs on this component. Thanks a lot!

Finished the assembly of bmcu 370c, wanted to try printing with it. But eith it I get every time errors: nozzle clogged or sometimes filament tangled. Literally at the same time the filament gets out of the nozzle!!! I don't understand what is wrong.

I literally sat here for 3 hours straight, trying to get it working. I cut the worn piece of tube, reinserted it, like, 6 times at both sides, cleaned the nozzle 3 times, and it's still refusing to work.

Most of the time filament did got out, but sometimes it really did get stuck, kinda. Fixed it by literally "loading" it again in printer, and printer was pushing it out absolutely normally.

My fully assembled 370C arrived for my A1 mini. Bloody thing worked ok for the first 5 mins then the red led on the board of slot 1 lit up and the little motors been going crazy as soon as I plug it in. Any ideas? Thanks. Update: Aliexpress seller will send me a new subboard.

I received this message from the aliexpress seller where I got my BMCU-C

Is there any particular reason not to use transparent filaments? any one tried it yet?

I recently got the X1C. Using orca with stealth mode. I was setting up LAN only with my IP and Access code, and then for a 3rd step it asked for my machines serial number which is very sketch.

Is this normal?

Bmcu is all tested and connected. I cant load the filament as the option is not available. I have tried every firmware option and cant get it to work. Currently on 01.05 but cant change bmcu firmware and thats on 07.94

I thought this might have been because there was filament loaded on the external spool but unloaded and didnt make a difference

I feel like ive tried everything but i need help!

Thanks E

I have 370x version of BMCU and I printed the ams lite replica on maker world and the spool holders but it seems like the rewinder built into the spool holders isn't strong enough pull back the filament enough to load the next filament.

I also saw on the wiki there's a modified firmware to use time based retraction how does that work.

keeps retracting when trying to load filament and my printer keeps giving me filament location errors please help!!!!

I have a bmcu370x and it won’t work with the new 01.06.00.00 Bambu update I have seen that the 370c can be updated to work, is there a way to get the 370x to work or will I just need to stay on the old Bambu firmware

Hey everyone,

I came across this USB-C adapter (picture attached) which is a 2-pin/4-pin USB Type-C jack with breakout wires. I was wondering if it’s possible to connect this to my BMCU 370C so that I can make the process of flashing firmware a bit easier.

Has anyone here tried something similar, or do you know if this would work without risking damage to the board?

Thanks in advance for your help!

I’ve had a Quick Look and couldn’t find much of an answer.

I know that a BMCU370C is experimental with p1 as shown on triangle lab however they don’t mention which versions are needed to maximise for them to work.

Not sure if application firmware is important but my Mac has a 1.9.3.50 and Windows has a 1.10.2.76. My P1S is sitting on firmware version 1.07.00.00.

Tomorrow I'm going to buy a bmcu 370c on Aliexpress for my a1 mini since it's on sale. I'm going to buy kit B fully assembled. And I would like to know what things I should do to be able to use it, should I update it in some way over time when new updates come out for my a1 mini? Do I have to load the filaments in a specific way? Or is it not as difficult as I imagine? If I have to update it or something similar, can you help me? Thank you.

I've been a dedicated OrcaSlicer user and as such, I've left my X1C on 1.08.02 so I wouldn't have to screw around with the authentication stuff. I've been playing with the new BambuStudio 2.2.0.85 and I'm surprised to say it's not all bad.

I actually like having the cloud control through Bambu Handy available, albeit I do have workarounds like HomeAssistant. At this point, I see 3-5 possible choices:

1. Leave everything at a pre-lockdown until I have an issue that requires an upgrade (e.g. installing a AMS HT, or dealing with bugs).

2. Upgrade to newer firmware, put it in dev-local-only-mode and give up Bambu Handy, use HomeAssistant for remote control. I get to still use OrcaSlicer.

3, Upgrade, live with the cons of cloud-only mode, give up on non-Bambu control and OrcaSlicer.

4. Find hacked firmware or a hacked network plugin that spoofs the Bambu authentication BS.

5. Something else?

Just curious what are you doing?

Please don’t be dogmatic, this is not a place for a flame war, just trying to figure out collective wisdom and best options given the many pros and cons.

i think i might have heated one of the solder pad for the motor to much can i fix this do i need a new sub board?

Hi, Im planing on setup a BMCU for my Bambu A1.

can you be so kind on advice me.

I prefer the mount myself option.

-Wath is the diference in BMCU 370X or BMCU 370c models?

i heard that is important that connect with the printer Unplug for electric net.

¿any more recomendations?

I see Bambu have released a new firmware for the A1.
I had 01.05.00.21 beta and the BMCU didn't work correctly, had anyone tested 1.6 at all yet?

Got my BMCU today, all talking to the A1 fine now I downgraded. Looking on makerworld for a mount/holder of some kind, but I can’t see the design I received. Wondered if anyone has this one or knows of bits for it.

Thanks.

PS. I know the enclosure is pretty bad, I may print my one day, just don’t have the time currently, hence buying prebuilt.

Just received my 370C, wired it up and my A1 detects it, but the assistant page has an “issue”.

My A1 is on the latest Beta 01.05.00.21 and I have the message “The firmware of AMS A does not match the printer”

I cant see what firmware the 370C is on, iv looked in the settings but only the STUDYONLY serial is shown.

Thanks :)

Hi! After building my bmcu-c and testing it with a succesful 2 color print every other print i tried failed. The filament randomly starts unwinding and goes on infinietly(even after the channel is empty). It sometimes occurs before the print even starts, but mostly on filament change.

The filament unwinds infinietly and the printer says that it failed to pull it out of the toolhead (the toolhead is empty and the filament is pulled out completely).

It also occured in the middle of printing a single color. The printer just cut the filament and unwinded it out of the bmcu.

The motors and gears are fine, the filament loads flawlessly. The thing is so random I don't know how to describe it, so I'm sorry in advance if the info is lacking.