New MMU2S not recognized
Finally got my MMU2S built and connected and now it won't recognize on the printer or with the computer. I have double checked the wiring and made sure that it is all in the correct color order. The cable from the MMU is on top with the brown cable to the left (frame side) and the IR sensor is on the bottom with the white cable on the left (frame side). The unit powers on with the printer but I'm not sure if the lights are supposed to come on or not. All of the LED lights come on when the printer powers on. I have flashed the printer to the most updated firmware, reinstalled Pursa Slicer and cannot flash the MMU since it is not recognized by the computer. I am running Windows 10 and have tried 2 different cables. The printer says MMU2 N/A. Any suggestions, please and thank you.
Having a similar problem. Prusa Slicer says that the MMU2 firmware was installed, but no motor movement on boot. Lights flash, but no motors.
I have the same problem, too.
After assembling the MMU2s and updating my MK3 to MK3s I flashed both (MK3S firmware and MMU2 firmware).
the MMU2 gets voltage (green LED on), the motors of the MMU2 never moved one single step, when I try to load a filament via the MMU2-button in the middle.
But my MK3s tells me on the LCD-screen if I study the self-diagnostics: „MMU N/A“ (yes, „MMU“ and not „MMU2 N/A“).
Now I‘ll try to check whether I connected the two MMU2 cables correctly to the MK3s-rambo-PCB.
Does anybody have a hint for me...?
I have checked my cabling several times. I even replaced my F.I.N.D.A.. There is no light on the F.I.N.D.A. probe. And when I go to support on the LCD screen it shows that the F.I.N.D.A. is N/A. For me, I am thinking it could be either the sensor cable or the circuit board.
Thank you! Ready to try the CHAT!!!
How do i contact live support chat? I have the same problem.
It wasn't sarcasm, I planned to and did contact CHAT. After three chats, it looked like I had the cables plugged in incorrectly. I do not have the orange piece around the connector where the FINDA plugs in. I had it one pin to the left. After this correction still no MMU2 or FINDA available. Frustrated I have temporarily stepped aside. I don't know if having the cable plugged in incorrectly damaged any of the boards. Thinking about ordering a MMU2 board, the main board, another new FINDA, and sensor.
Will try Facebook MMU2 group first.
Thank you for the suggestion! I posted on Facebook. I will give that a couple of days to see if there are any other possible solutions before I contact Prusa again.
OP here - still working on the problem. Accidentally broke a part in the printer when checking assembly and was trying to find another printer to make the part.
Would the IR sensor not working cause any of the issues? Before the upgrade, the sensor seemed to have failed during a print and I had to start doing manual loads and unloads instead of being able to just push the filament in. I never tried to get a replacement since it didn't bother me on the single filament system but if it needs to work to use the MMU2, I probably need to replace it.