Assemble MK3S and MMU2S at same time
Prusa needs to add to instructions so those of us that are assembling MK3S and MMU2S at the same time. I'll start late today to assemble the E-Axis and will need to try and figure out how to do it by flipping between MK3S and two parts of MMU2 upgrade instructions (disassembly and reassembly).
RE: Assemble MK3S and MMU2S at same time
Actually you don't have to. In the MK3s instruction there are sections which tells you which part to use if you have MMU2s. So it's already considered.
Happy building ...
Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram
RE: Assemble MK3S and MMU2S at same time
That said, I think it's a good idea to build the MK3S first, get it working well and dialed in, and only then attempt the MMU2S. The MMU adds a lot of complexity and it's helpful to start from a point where you know the base printer is working.
RE: Assemble MK3S and MMU2S at same time
I have already built MK2 and upgraded twice so it is now MK2S.
It turns out that 3A. MK3/MK2.5 - extruder upgrade (MMU2) at https://manual.prusa3d.com/Guide/3A.+MK3-MK2.5+-+extruder+upgrade/1069?lang=en provide the instructions, although I learned that after installing the magnets.
I’ll report back after completing my assembly.
RE: Assemble MK3S and MMU2S at same time
Actually you don't have to. In the MK3s instruction there are sections which tells you which part to use if you have MMU2s. So it's already considered.
Happy building ...
If that's true, I missed it in the manual. My MK3S came with an assembly manual but the MMU2.0S came with no such assembly manual so I was using the online resource. My MK3S book, however, made no reference to the unique idler door that I saw in the MMU's online book. I ended up going page by page in the book and online and wrote in the book when I had to use the online guide. So far, I'm about halfway done with the assembly. Hope I didn't miss anything!
RE: Assemble MK3S and MMU2S at same time
You're right. In the MK3s manual there is no link to MMU2 special cases: https://manual.prusa3d.com/Guide/5.+E-axis+assembly/1055
I made an upgrade from MK3(rev3)+MMU2 to MK3s(rev4)+MMU2 and had to jump between three manuals because of the complete extruder rebuild. Looks like I mixed things up.
Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram
RE: Assemble MK3S and MMU2S at same time
What I did notice, though, was that the unique E axis parts were bagged separately from the parts that were common between the two extruder bodies so it wasn’t too difficult to keep it straight. I’ll know for sure when I plug it in the first time! Lol
When assembling MK3/s and MMU2 at the same time, I was able to follow 3A. MK3/MK2.5 - extruder upgrade instructions for building the extruder and filament chimney. After that section, I returned to step 6 in the MK3/S instructions and completed the basic printer build and performed the “Live adjust Z: steps.
The next step was to test a print. Here I found that it was necessary to turn off both auto feed and auto filament detection to successfully print.
All is OK and now the rest of the MMU can be assembled.
So, I do not think it is necessary to build the extruder without the MMU chimney first and then partially disassemble it to install the MMU.
Yes, it is absolutely recommended that calibration be completed before assembling the MMU add-on.