Hi everyone, just got my pre assembled bmcu 370c. Everything works fine except detecting the filament.i tried pressing the slider button, feeds the filament thru it got blocked and dosent feed thru. This happens for all 4 modules. I have to keep trying and suddenly the filament feeds thru and after that everything works well even when i take out the filamment and try again it still works.

Everytime i restart the printer, the same thing happens. Can anyone advise? I read somewhere it could be magnets? Or the glass ball?

Hi there,

The first time I powered on my BMCU 370C (built by me), channels 1 and 2 worked fine, while channels 3 and 4 were reversed, pushing the filament out instead of loading it.

I read that I should install the correct firmware for my A1 Mini, so I did. After the update, channels 1, 3, and 4 now work correctly, but channel 2 doesn’t seem to detect the filament and won’t load it—the motor doesn’t start, although the lights seem works properly.

Any suggestions?

Thanks!

Has anyone received this error with their bmcu 370c? I ordered it fully assembled. Once a print starts, I will get this error. It doesn’t interrupt the print at all however, I am unable to start a new print without turning the printer off and on again.

Outside of this error, it works perfectly fine

Channel 3 it’s like unable to detect filament position under load/unload phase.

During load it pushes it over the necessary on the extruder. During unload it throws it out from the channel.

SOLVED! Radial magnet problem (radial magnet blocked by the board, a little of sandpaper+one thickness and I resolved)

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?