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[Solved] Firmware 6.3.1 with MMU3 support released today  

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LarGriff
(@largriff)
Reputable Member
Firmware 6.3.1 with MMU3 support released today

I see it on Github, but not yet on Prusa3d's website.  Don't see it in PrusaSlicer yet either.  But soon!!!

Releases · prusa3d/Prusa-Firmware-Buddy · GitHub

MK4S/MMU3

Posted : 02/04/2025 6:44 pm
3 people liked
Scott
(@scott-18)
Reputable Member
RE: Firmware 6.3.1 with MMU3 support released today

No phase stepping calibration, I’m so disappointed…

Posted : 02/04/2025 6:59 pm
Jürgen
(@jurgen-7)
Noble Member
RE:
Posted by: @scott-18

No phase stepping calibration, I’m so disappointed…

Yes, that sucks. Especially since the release history shows that the Prusa developers tried to enable it, but failed. It would be really good to get a statement whether they think they can pull it off at all, and if so, when. 

Posted : 02/04/2025 7:36 pm
1 people liked
Jürgen
(@jurgen-7)
Noble Member
RE: Firmware 6.3.1 with MMU3 support released today

Update from Prusa development lead, danopermis, on Github:

Yes, that is correct, we had to disable the calibration in the menu for the final build. It fails too often and we didn't want to deal with all the bug reports due to BSOD caused by OOM situation.

If you are running 6.3.1 and you still want to try it, you can issue M1977 G-Code via serial line or by "printing" a file containing just this line. This should run the wizard. That being said, please understand that this is still experimental and may fail in unexpected ways. If it fails, you should be able to recover by doing full factory reset.

We are in a weird spot here, where we would like to gather more feedback from the community, yet this feature may actually harm the printer's performance. I sincerely hope that github users would understand this delicate situation.

https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4461

 

Posted : 02/04/2025 7:44 pm
2 people liked
N3XT3D
(@n3xt3d)
Trusted Member
RE: Firmware 6.3.1 with MMU3 support released today

That sounds bad.

Posted : 02/04/2025 7:49 pm
LarGriff
(@largriff)
Reputable Member
Topic starter answered:
RE: Firmware 6.3.1 with MMU3 support released today

So, what *should* happen if you issue the M1977 command?  If I understand, that enables the calibration ability in the menu, but will that then require use of the accelerometer or is there some other way to calibrate?

Posted by: @jurgen-7

Update from Prusa development lead, danopermis, on Github:

Yes, that is correct, we had to disable the calibration in the menu for the final build. It fails too often and we didn't want to deal with all the bug reports due to BSOD caused by OOM situation.

If you are running 6.3.1 and you still want to try it, you can issue M1977 G-Code via serial line or by "printing" a file containing just this line. This should run the wizard. That being said, please understand that this is still experimental and may fail in unexpected ways. If it fails, you should be able to recover by doing full factory reset.

We are in a weird spot here, where we would like to gather more feedback from the community, yet this feature may actually harm the printer's performance. I sincerely hope that github users would understand this delicate situation.

https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4461

 

 

MK4S/MMU3

Posted : 02/04/2025 7:58 pm
N3XT3D
(@n3xt3d)
Trusted Member
RE: Firmware 6.3.1 with MMU3 support released today

Normally this is not possible without the accelerometer. This is already integrated in the xl.

I wonder if the out of memory error is caused by the 0.9° stepper? The xl has the 1.8° stepper motors.

Posted : 02/04/2025 8:06 pm
WarezMonkey
(@warezmonkey)
Trusted Member
RE: Firmware 6.3.1 with MMU3 support released today

We're going to need a bigger buffer, or a smaller tube...
https://imgur.com/1d3iwCK

Posted : 02/04/2025 8:20 pm
4 people liked
Scotttomo
(@scotttomo)
Estimable Member
RE: Firmware 6.3.1 with MMU3 support released today

 

Posted by: @warezmonkey

We're going to need a bigger buffer, or a smaller tube...
https://imgur.com/1d3iwCK

You persevered then? Expect to have a load of PM's if you get this working before Prusa do 😅

Scott

Posted : 02/04/2025 8:33 pm
WarezMonkey
(@warezmonkey)
Trusted Member
RE: Firmware 6.3.1 with MMU3 support released today

Yeah, the big changes that I made were

  • modified the legs of the MMU3 "UltiMulti" to have it attach and hang off the rear top
  • modified the nextruder the same I did for the MK4S with the new filament sensor
  • replaced the HF nozzle with non HF
  • Modified the hardware settings in the LCD to be: MMU3, mmu3 type of nextruder, standard nozzle
  • Diff'd the Mk4+MMU3 and core one slicer profiles to add the custom filament change gcodes to a new profile (I should share this?) 
  • got a longer tube from the MMU->Nextruder.. modified the setting of the MMMU with the new length (M708 A0x22 X520)

Currently printing my first successful multi colour shape... of course the lid is completely off to support this... and the buffer is too small, I predict snags.

 

Posted : 02/04/2025 8:39 pm
3 people liked
Scotttomo
(@scotttomo)
Estimable Member
RE: Firmware 6.3.1 with MMU3 support released today

 

Posted by: @warezmonkey

Yeah, the big changes that I made were

  • modified the legs of the MMU3 "UltiMulti" to have it attach and hang off the rear top
  • modified the nextruder the same I did for the MK4S with the new filament sensor
  • replaced the HF nozzle with non HF
  • Modified the hardware settings in the LCD to be: MMU3, mmu3 type of nextruder, standard nozzle
  • Diff'd the Mk4+MMU3 and core one slicer profiles to add the custom filament change gcodes to a new profile (I should share this?) 
  • got a longer tube from the MMU->Nextruder.. modified the setting of the MMMU with the new length (M708 A0x22 X520)

Currently printing my first successful multi colour shape... of course the lid is completely off to support this... and the buffer is too small, I predict snags.

 

Fair play man, that's cool as f**k. I wish you all the best to get it working as it should.

I am starting to see why these forums are the best place to be, but boy is it a roller coaster 😅

Scott

Posted : 02/04/2025 9:20 pm
iftibashir
(@iftibashir)
Noble Member
RE: Firmware 6.3.1 with MMU3 support released today

Cant open the image link for some reason, but good to see the progress!!

Click here for VIDEO BUILD GUIDES + 3D Printing Tips!

--> Core One - MK4 - MK4S - MINI+ - MMU3 - Accelerometer Guide <--

Posted : 03/04/2025 12:49 pm
WarezMonkey
(@warezmonkey)
Trusted Member
RE: Firmware 6.3.1 with MMU3 support released today

This image/video link should work now. Guess I need to learn imgur 😀

https://imgur.com/mmu3-with-core-one-1d3iwCK

Posted : 04/04/2025 3:32 pm
1 people liked
iftibashir
(@iftibashir)
Noble Member
RE: Firmware 6.3.1 with MMU3 support released today

See what you mean about needing a larger buffer assembly!

Click here for VIDEO BUILD GUIDES + 3D Printing Tips!

--> Core One - MK4 - MK4S - MINI+ - MMU3 - Accelerometer Guide <--

Posted : 04/04/2025 4:33 pm
WarezMonkey
(@warezmonkey)
Trusted Member
RE: Firmware 6.3.1 with MMU3 support released today

I'm going to try and print this: https://www.printables.com/model/953614-mmu3-cassette-compatible-buffer-for-prusa-mk4-r4-c

Together these are 330 mm of length which gives me ~660 mm +/- of loop to work with. With my 520mm PTFE tube, this should do the trick. If it doesn't, then I extend and try again! Beauty of 3D printing... 

Posted : 04/04/2025 4:40 pm
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