Upgrade path from MK3s/MMU2s to MK4/MMU3
I've been looking at the compatibility of the MMU3 and MK4 upgrade kits, and I'm mainly interested in the MMU3 upgrade to start with. I have an MK3s (not +) with an MMU2s. The MMU3 upgrade kit lists the MK3s as incompatible.
From what I remember the MMU2s kit included some of the MK3s+ upgrades for the extruder, but it looks like it didn't include everything.
I would then think the best path forward here to get the MK3s+ upgrade kit and upgrade the missing MK3s+ pieces. However, the MK3s+ upgrade kit lists the MMU2s as incompatible.
There are similar compatibility problems for the MK4 upgrade kit from my configuration.
So, is there a path forward for the MMU3 or MK4 from my configuration?
Best Answer by K7ZPJ:
I've been looking at the compatibility of the MMU3 and MK4 upgrade kits, and I'm mainly interested in the MMU3 upgrade to start with. I have an MK3s (not +) with an MMU2s. The MMU3 upgrade kit lists the MK3s as incompatible.
From what I remember the MMU2s kit included some of the MK3s+ upgrades for the extruder, but it looks like it didn't include everything.
I would then think the best path forward here to get the MK3s+ upgrade kit and upgrade the missing MK3s+ pieces. However, the MK3s+ upgrade kit lists the MMU2s as incompatible.
There are similar compatibility problems for the MK4 upgrade kit from my configuration.
So, is there a path forward for the MMU3 or MK4 from my configuration?
To upgrade your existing MK3 to work with the MMU2S / MMU3, you need to replace the following parts.
Hot End PTFE Tube: https://www.prusa3d.com/product/hotend-ptfe-tube-mk3s-mmu2s/
IR Filament Sensor: https://www.prusa3d.com/product/ir-filament-sensor/
IR filament sensor-Einsy cable: https://www.prusa3d.com/product/ir-filament-sensor-einsy-cable/
Replace (Print or buy) all of the extruder printed parts: https://www.printables.com/model/57217-original-prusa-i3-mk3s-printable-parts?_gl=1*s4vbtc*_ga*MzQ4MTUwMjQuMTY1Nzg0Mzg1OA..*_ga_3HK7B7RT5V*MTY4OTAxNDc5MC41NTIuMS4xNjg5MDE2MjMyLjkuMC4w
Optionally replace the Pinda sensor with the Super Pinda: https://www.prusa3d.com/product/superpinda/
RE: Upgrade path from MK3s/MMU2s to MK4/MMU3
Does your MMU2 work? Mine doesn't electrical gremlins. It is going to be deep sixed and I plan on using the MMU3 on my MK4 kit that I'm getting. I also have a 5 head XL coming, so I might just skip the MMU3 altogether.
IIRC, and I rarely do, the MK3s had some filament sensing changes and the change to the new bed level sensor that was more heat resistant??? I think the only difference between a MK3+/MMU2S is the bed sensor??? The MMU2S updated the MK3 extruder top end. TO many printers, to many mods, too long ago...
RE: Upgrade path from MK3s/MMU2s to MK4/MMU3
Yeah I'm thinking about jettisoning my MMU2S when I upgrade my 2 MK3+ machines. The MMU does work but I do get what I believe is the much talked about 5v problem once in a while.
I also have a day one 5 extruder XL assembled preorder and I think I'll probably use that as my multi-color/filament printer. the thing that's annoying about the MMU2S (other than the normal things) is the fact that it basically means I can use it as a tpu printer unless I unplug the mmu and feed the tpu directly to the extruder. This is a big reason I left one of my two printers non-mmu.
At this rate the XL might get here before the MK3->MK4 upgrade kits...
Does your MMU2 work? Mine doesn't electrical gremlins. It is going to be deep sixed and I plan on using the MMU3 on my MK4 kit that I'm getting. I also have a 5 head XL coming, so I might just skip the MMU3 altogether.
IIRC, and I rarely do, the MK3s had some filament sensing changes and the change to the new bed level sensor that was more heat resistant??? I think the only difference between a MK3+/MMU2S is the bed sensor??? The MMU2S updated the MK3 extruder top end. TO many printers, to many mods, too long ago...
RE:
I've been looking at the compatibility of the MMU3 and MK4 upgrade kits, and I'm mainly interested in the MMU3 upgrade to start with. I have an MK3s (not +) with an MMU2s. The MMU3 upgrade kit lists the MK3s as incompatible.
From what I remember the MMU2s kit included some of the MK3s+ upgrades for the extruder, but it looks like it didn't include everything.
I would then think the best path forward here to get the MK3s+ upgrade kit and upgrade the missing MK3s+ pieces. However, the MK3s+ upgrade kit lists the MMU2s as incompatible.
There are similar compatibility problems for the MK4 upgrade kit from my configuration.
So, is there a path forward for the MMU3 or MK4 from my configuration?
To upgrade your existing MK3 to work with the MMU2S / MMU3, you need to replace the following parts.
Hot End PTFE Tube: https://www.prusa3d.com/product/hotend-ptfe-tube-mk3s-mmu2s/
IR Filament Sensor: https://www.prusa3d.com/product/ir-filament-sensor/
IR filament sensor-Einsy cable: https://www.prusa3d.com/product/ir-filament-sensor-einsy-cable/
Replace (Print or buy) all of the extruder printed parts: https://www.printables.com/model/57217-original-prusa-i3-mk3s-printable-parts?_gl=1*s4vbtc*_ga*MzQ4MTUwMjQuMTY1Nzg0Mzg1OA..*_ga_3HK7B7RT5V*MTY4OTAxNDc5MC41NTIuMS4xNjg5MDE2MjMyLjkuMC4w
Optionally replace the Pinda sensor with the Super Pinda: https://www.prusa3d.com/product/superpinda/