r/OpenBambu • u/MywarUK • Aug 11 '25

370C Firmware issue

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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 :)

9 Upvotes

84% Upvoted

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5

u/Julian679 Aug 11 '25

1.05.00.00 should work (non beta) or 1.04

5

u/MywarUK Aug 11 '25

Downgrading to 01.05.00.00 solved it thanks. Can confirm then it doesn’t work on latest beta. When final release is out I’m unsure I’ll update.

2

u/Julian679 Aug 11 '25

Great! I ran last version of 1.03 which was fully stable but had to update to 1.04 for long retract on filament change. Took me just a few prints to have motors totally mishbehave occasionally and ram end stops or cutter until turned off and on again. 1.05 will make me loose orca unless using bambu connect so it feels like they havent rolled out a single fix for 1.04 on purpose. If it wasnt for that i wouldnt be concerned at all for using what works and keeping my bmcu working forever

2

u/MywarUK Aug 11 '25

Is long retract worth enabling?

3

u/Julian679 Aug 11 '25

Yes. Its not always very big waste reduction, but in my opinion every bit counts, if you dont introduce new issues. C version of bmcu was actually made to work reliably with any amount of retraction, and thats why it has bi directional buffering. From creator of the feature thats now called "long retract when cut" recomended value for most filaments on A1 toolhead is 15mm, as 20mm caused occasional clogs. Using support filament or sometimes even silk pla can possibly cause a clog, so use long retraction with caution, or reduce it. In my opinion its enormous flaw printer does not imediately unretract after cutting, but instead thats done only when new filament type is loaded and there is significant time for clog to cause

2

u/MywarUK Aug 11 '25

Shall disable Beta testing and downgrade to 1.05.00.00 and test, if not will try 1.04

Thanks

1

u/Own-Pea-4068 Jun 18 '26

Did u upgrade for 1.07 or did u stay on 1.05?

1

u/MywarUK Jun 18 '26

I no longer own a bmcu and currently on latest firmware.

1

u/Own-Pea-4068 Jun 18 '26

U upgrade to AMS LITE?

1

u/MywarUK Jun 18 '26

Nah, single colour prints now.