MK3s With MMU3 not showing up as an option when uploading from PrusaSlicer
 
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MK3s With MMU3 not showing up as an option when uploading from PrusaSlicer  

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BeckTuning
(@becktuning)
Member
MK3s With MMU3 not showing up as an option when uploading from PrusaSlicer

I recently upgraded my old MMU2 to the MMU3 when I finished installing it back on to the MK3s Prusa Connect did not recognize that it had the MMU3 and I was unable to send files to the printer. I removed the printer from Prusa Connect and added it back in and this fixed it for 2 prints. Now when I try to send any files to the printer Prusa Connect will not present me with any printers and just says theres no compatible printers for the multi material files.

Things I have tried so far:

Reseting the printer and MMU3

Disconnecting it from the network and adding it back in once the printer and MMU3 are booted up

I am currently running the latest firmware on both the printer and the MMU3

Thanks for any assistance with this.

Posted : 19/03/2025 5:04 pm
sandwave
(@sandwave)
Member
RE: MK3s With MMU3 not showing up as an option when uploading from PrusaSlicer

I have this problem with my XL as well.  I recently updated the FW to 6.2.2+8853.  I did a print of a couple prusa parts, then Prusa Connect doesn't recognize the printer as online.  I added the printer to prusa connect, then I could see that it's idle from prusa slicer's prusa connect, but when I slice and try to send to connect it says there are no compatible printers.

Looks like I can manually transfer the gcode file to USB like a caveman still, and start a print.

Posted : 02/04/2025 10:56 pm
boricuastock
(@boricuastock)
Member
RE: MK3s With MMU3 not showing up as an option when uploading from PrusaSlicer

I have this same issue. I see the no compatible printers when trying to print anything. Upgraded to the MMU3 on my MK3S+. I can "force" it by uploading the file directly and printing but not ideal. Hoping there is a way to resolve this.

Posted : 06/04/2025 10:50 pm
Tie-fighter
(@tie-fighter)
Member
RE: MK3s With MMU3 not showing up as an option when uploading from PrusaSlicer

It is the same for me. Seems like the printer is sometimes not recognized as MK3SMMU3 but as MK3S.
I can sometimes fix it by rebooting the RPi and the printer, but it is not fully reproducable. Sometimes waiting helps.

tbh this is quite a nuisance, as it completely breaks the Send to Connect workflow :'(

I'd be more than happy to swap the auto-recognition for a configuration setting. I imagine most people don't detach/attach the MMU that often.

Posted : 19/04/2025 9:04 am
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