MMU3 for MK4S
I am in process of upgrading my MMU3 from the MK3S+ to my (newly upgraded) MK4 printer. I'd like to get the MK4S upgrade as well, but does anyone know if this will require further upgrade of the MMU3 ?
Best Answer by Lynn:
Looking at the upgrade parts list, I don't see how the MK4S upgrade would effect using the MMU3 in any way.
Prusa is MK4S w/ MMU3 (formerly MK4 / MMU3, MK3S+/MMU2), 2 Prusa MINI+, Octoprint. PETG, PVB, (some) PLA.
RE: MMU3 for MK4S
Looking at the upgrade parts list, I don't see how the MK4S upgrade would effect using the MMU3 in any way.
RE: MMU3 for MK4S
Got this confirmed by Jan at Prusa here: https://help.prusa3d.com/guide/9a-mk4-nextruder-mod_683106 Apparently, should be an easy upgrade with no impact to MMU3.
Prusa is MK4S w/ MMU3 (formerly MK4 / MMU3, MK3S+/MMU2), 2 Prusa MINI+, Octoprint. PETG, PVB, (some) PLA.
RE: MMU3 for MK4S
I just got off of chat with Prusa tech support and at the time of release the MK4S upgrade is NOT compatible with the MMU3.
They said that I might be able to get the MMU3 to work with the high flow nozzles with some tweaking but it will have to be a manual process for now. My other choice is to install the old nozzle when printing multi-color.
Here is what they said about the MK4S and MMU3 without manaul tuning "if you don't adjust the settings you would probably get a lot of stringing and oozing"
Considering how long Prusa made us wait for the MMU3 for the MK4 one would think that Prusa would do everything they can make any MK4 upgrades compatible with the MMU3.
I am VERY disappointed and I will be canceling my order for the MK4S upgrade, Obxidian high flow nozzle and some other accessories and filament.
Prusa please don't leave us MMU3 users behind.
RE: MMU3 for MK4S
According to Alfredo C at Prusa tech support:
so, to sum up, mmu3 is compatible with the mk4s, the standard nozzle is recomended to lower the waste, by but the high flow nozzle will also work, there is a prusa slicer profile for the mmu3 mk4 with high flow nozzle