Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.
 
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Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.  

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Vance
(@vance)
Active Member
Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.

I just finished the assembly. I go to install the software, drivers and firmware on a fresh laptop with Windows 10 that has never had any software installed by me. Driver seems to have installed, I can update the firmware on the printer. It now reports it is a MK3s. Except it says the MMU unit is not available. The cables are connected correctly, it goes through some sort of start up buzzing when I power the printer on. It will not connect to the computer to update it's firmware. I can not get any response from it. The printer calibrated fine and is now printing out a file for testing. I've tried reinstalling software and drivers 2 times and rebooted the computer before trying to connect to the mmu board, but no go. Don't know where to go from here.

Posted : 25/05/2019 12:48 am
gnat
 gnat
(@gnat)
Noble Member
RE: Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.

If you are sure the cables are all correct, then your MMU board might be bad. Ping support. 

MMU tips and troubleshooting
Posted : 25/05/2019 1:38 pm
Vance
(@vance)
Active Member
Topic starter answered:
RE: Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.

Yeah. I've gone through the cable hook ups several times and confirmed they are correct. Just thought there might have been another way to tell. When it goes through the start up noise, the led's on the board flash once in sequence and then there is nothing. I will ping support.

Posted : 25/05/2019 5:26 pm
gnat
 gnat
(@gnat)
Noble Member
RE: Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.

Yeah sounds like the start up is correct, but that you can't even flash the firmware suggests to me that there is something wrong on the board itself.

MMU tips and troubleshooting
Posted : 25/05/2019 5:45 pm
Vance
(@vance)
Active Member
Topic starter answered:
RE: Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.

Spent an hour with customer support chat today. Everything he suggested I try I already did but did it again for him and it still didn't work. He asked for a picture of the MMU board and then said that the board was likely damaged by static electricity at some point. They are sending me a new MMU control board. It good customer service, but a bummer for me as I was looking forward to trying out some multi color prints. OH well, at least the printer still works. The MK3s upgrade went good. That will make the third time I built that extruder and wired it. 1st time was when I built the MK3 from a kit, 2nd time was when they released the new extruder design and now for the MK3s upgrade. Still my most reliable printer out of all that I have.

Posted : 25/05/2019 11:47 pm
Vance
(@vance)
Active Member
Topic starter answered:
RE: Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.

I just got the replacement mmu2s board today. That was quicker than I was expecting. Thanks Prusa. Now to get this thing running.

Posted : 04/06/2019 1:17 am
Snowboardrfun
(@snowboardrfun)
New Member
RE: Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.

I Just got finished building mine yesterday and I ran into the same thing. Support will be sending me a board since it's hooked up but the printer will not see the MMU2s and I am unable to flash it. Did getting the new MMU2s board fix the issue?

Posted : 06/06/2019 9:28 pm
Vance
(@vance)
Active Member
Topic starter answered:
RE: Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.

I haven't tried it yet. Was waiting for the weekend when I have more time. They say the boards was damaged by static electricity, but I have built many computers from parts and never had any problem .

Posted : 06/06/2019 11:19 pm
Vance
(@vance)
Active Member
Topic starter answered:
RE: Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.
Posted by: david.w63

I Just got finished building mine yesterday and I ran into the same thing. Support will be sending me a board since it's hooked up but the printer will not see the MMU2s and I am unable to flash it. Did getting the new MMU2s board fix the issue?

I just did go install the new board. Both firmwares flashed successfully and the MK3s now says the MMU2s is connected and reports which firmware versions are installed. The boot up process is also different. When I turn the printer on, it boots up and then the MMU2s boots up and all it does is have the leds flash in sequence, there is no multi toned buzzing anymore. Filament loading went just fine and it is doing it's first test print right now. I got this more for the feature it has that I can load 5 almost used up spools of filament and when it senses the filament in slot 1 runs out, it will automattically unload the remainder of that and load slot 2 and continue in sequence and go in a continuous loop. When you go check on it and the first three spools are used up, you can put more in those slots and it will keep going in the loop.

I will play with multi color prints, but I mainly am interested in the other feature. I have many partial spools to use up.

Posted : 07/06/2019 12:20 am
Snowboardrfun
(@snowboardrfun)
New Member
RE: Just finished the upgrade of my MK3 to MK3s with MMU2s unit on top.

Awesome, I am glad to hear the new board did the trick for you. I got the message my replacement board is shipped and should revive it on Monday. I got it since I really want to do multicolor prints, I can't wait!

Posted : 07/06/2019 5:02 pm
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