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MMU2 Assembly instructions. Seems like a strange order.  

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Mike-Mat
(@mike-mat)
Active Member
MMU2 Assembly instructions. Seems like a strange order.

Bought my printer assembled. Also bought the MMU2. I understand it said it was a kit. I assumed that meant the parts would be assembled and then added to the machine. I had no idea every screw, bearing and sub-assembly would have to be put together.  OK I can put stuff together. But I would have paid more not to do this.

Then I look in the book. No instructions there. Go to the web. Obviously  the web will contain the latest changes and larger images.
It seems strange to me that after the Introduction, the first thing you want me to do is start disassembling the Extruder.  Wouldn't it make more sense to build the actual MMU with all of it's parts first, then work on changing the extruder to accept the newly assembled MMU unit?

It just seems out out of order.

Exploded views of the sub-assemblies would be nice, to visualize the assembly process.

I cant find any pictures of what this is supposed to look like with the spool holders and buffer assembly completed and connected to a machine. Near as I can tell, the spool holders will sit on a shelf (of unknown size requirements) behind the printer. Where the buffer assembly sits in relation to everything else is still a mystery.

Mike

Posted : 30/05/2021 11:30 pm
Baklin
(@baklin)
Reputable Member
RE: MMU2 Assembly instructions. Seems like a strange order.

The handbook has good information.

https://help.prusa3d.com/en/article/3d-printing-handbooks_125045

And I really like this video to see what the MMU does during all the different load and unload steps.

 

Posted : 02/06/2021 9:59 pm
Mike-Mat
(@mike-mat)
Active Member
Topic starter answered:
RE: MMU2 Assembly instructions. Seems like a strange order.

@baklin

Thanks for your reply. The video looks like it will be very helpful. If I sounded frustrated, it's because I was. Didn't expect all the time to assemble the MMU and all the disassembly of the print head. As it is now, I believe everything is done, but not adjusted or tested.
I was hoping this was a unit that I could attach and use for multi-material work and then (maybe) remove for single filament parts. With the amount of disassembly/reassembly of the head, I can see that's not the case.
I still have no idea what the Buffer is for, where it goes (not in the instructions), how it's attached, or what it's purpose is. I skimmed thru the video and didn't see anything there either. Haven't found a single "big picture" view of how it gets connected.

Mike

Posted : 02/06/2021 10:26 pm
Rufus
(@rufus)
Active Member
I feel your pain

I feel your pain. This is for the most part a joke. I now have a brand new Prusa $1100 3D printer I can not use because there is not enough info or help to get it going. I would love my money back for this and wait until MAYBE they advance the MMU far enough OR atleast write directions a non engineer would understand. To many things to go wrong and not enough support.

Posted : 23/10/2021 4:57 pm
Zoltan
(@zoltan)
Moderator
RE:

Hi Mike

I encouraged myself to buil the MMU after at least 2 years of experience with 3D printing. Unless you understand basic (probably even extended) principles of 3D print, than it is time to start with MMU.

Those are two independent equipments - Printer and MMU - communicating with each other. The settings , especially the calibrations and Filament senzors have to be carefuly  calibrated. 

Last but not least, there is a need to read a lot about the subject, as the 3D printers are today not Plug-and-play toys.

BUFFER:

Btw. the buffer. Each filament is loaded to one of the MMU inputs.There are 5 of them.  Then there is a ptfe tube between the MMU and the printer. When you load the filament to the head it leads also through this tube. When you unload the filament its tip runs from the haed till the MMU selector. As the filament spools do not roll the filament back, there is a left over filament outside of the each (5 pieces) ptfe tube lbetween the MMU and the roll.

Not to have a mess of left overs, you put between the filament rolls and the MMU ptfe tubes this buffer, which is storing and hiding those left overs. If you do not care the mess and do not mix the filaments, the buffer is not needed.

I tried to describe as much as possible. I hope it could help.

My advice is: enjoy the single printing, put the MMU in save place and at the moment the single color print becomes boring, start to play with MMU.  😉 

To print a single color model with mmu is very simple : use menu Load filament to haed, seect one of the filaments and just start printing a gcode file sliced in simple MK3 profile. SO you can use directly any .gcode for MK3 printer.

This post was modified 3 weeks ago 3 times by Zoltan
even an old man can learn new things 🙂
Standard I3 mk3s, FW 3.10.1 RC1, MMU2S, no closed box, sketchup , fusion 360, PrusaSlicer, Windows 10
PRUSA MINI FW 4.3.3, Prusa Connect Beta...
Posted : 08/11/2021 6:42 pm
Zoltan
(@zoltan)
Moderator
RE:

Rufus,

do not give up, there are a lot of people, they can help you at least the support team, which is reachable via chat from e-shop page.

After you do the correct set up, you will certainly enjoy it.

the help.prusa3d.com contains a lot of supporting articles. and this forum as well.

This post was modified 3 weeks ago by Zoltan
even an old man can learn new things 🙂
Standard I3 mk3s, FW 3.10.1 RC1, MMU2S, no closed box, sketchup , fusion 360, PrusaSlicer, Windows 10
PRUSA MINI FW 4.3.3, Prusa Connect Beta...
Posted : 08/11/2021 6:46 pm
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