Upgrading MMU3 for MK3s+ to MMU3 for MK4
I looked on the prusa website and on printed3d and can't find what I need to upgrade an MMU3 which is for MK3s+ to work on MK4. It seems I need a different cable and some printables but I can't find the info. Can someone point me to where I might find it? I have the potential to purchase a new and unused MMU3 and want to see how much it would cost to make it work on MK4.
Also, is the MMU3 a good add on? Work well, etc?
Thanks,
Craig
RE: Upgrading MMU3 for MK3s+ to MMU3 for MK4
Same here – I’m in exactly the same situation.
I’ve got an MMU3 that’s specifically the “MMU3 for MK3S+” version, and I’d like to run it on a MK4. I’ve also been looking through the Prusa shop, documentation and Printed Solid/Printed3D etc., but I can’t find a clear, up-to-date description of what exactly needs to be changed to make the MK3S+ MMU3 work on the MK4.
From what I understand so far, it should “just” be a different cable/connector set and some MK4-specific printed parts/mounts, but there doesn’t seem to be a simple official “adapter kit” or a bill of materials for people who already own the MMU3 for MK3S+.
What I’d really need is:
a list of the extra hardware parts required (cables, brackets, screws, anything non-printed), and
a pointer to the correct printed parts (STLs) for the MK4 setup.
I’m totally fine with printing all plastic parts myself, I just need to know which ones and which non-printed bits to order.
It’s also a bit time-critical on my end, since I need to place the order this week so it still fits into our current budget cycle.
Any help or pointers to the correct documentation would be greatly appreciated!
RE: Upgrading MMU3 for MK3s+ to MMU3 for MK4
Edited / Update: Okay, I feel a bit dumb now — I did manage to find the correct info after digging deeper into the Prusa knowledge base. Leaving this here in case anyone else runs into the same confusion.
These two pages contain exactly what I was looking for:
List of parts for MMU upgrades (official Prusa BOM): https://help.prusa3d.com/article/list-of-parts-for-mmu-upgrades_887521
Original Prusa MK3S+ MMU3 → MK4 / MK3.9 MMU3 upgrade manual: https://help.prusa3d.com/de/manual/original-prusa-mk3s-mmu3-auf-mk4-mk3-9-mmu3-upgrade_2156
They include the needed hardware, printed parts, wiring specifics, and the whole step-by-step process.