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Is the Bambu pretty good with switching from one filament to the next? I have a Prusa and I get the 3kg spools. I got the MMU2 and it's a fucking joke. I removed it a long time ago. Hoping to get a Bambu for my next printer and exclusively use it in LAN-only mode.
I don't know what were your particular issues, but I used to have problems with it not being able to home it's motors and even failing to unload and load a cleanly cut filament. All it said is "MMU REQUIRES USER ATTENTION". It was very frustrating for me, prints not being able to start etc. And of course the idiotic error message.
But about three weeks ago they released a new firmware version for both the MK3S and the MMU2. And I was surprised to see that the printer started displaying normal error messages and even a short link to the exact documentation page which explains the error condition. And basically mine was this: http://prusa.io/04306, which basically boils down to "Power issue detected". I took a look into the mainboard box and indeed it was a loose connection on the positive terminal. I'm glad the thing didn't melt or catch fire (the printer was a kit, which I bought second-hand, assembled by some random guy).
Anyway, you might want to put back your MMU, update it, maybe some of the issues will be better explained to you.
Heard it's not too bad. The machine tells you the spool is empty and will pause the print. I did hear some people had same issues with it skipping a layer or 2 after it restarts.
It’s not without flaws, but I would recommend.
Just know that it adds time and waste to prints.
There is also a nice feature that allows you to automatically switch over to a new roll when the 1st roll runs out. That’s nice.