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Original Prusa i3 MMU2S upgrade kit (for MK2.5 & MK3S/+) - ORG

Multi Material Upgrade 2S (MMU2S) is a brand new and improved version of the Multi Material Upgrade 2.0 - our unique multi-material addon, which enables your 3D printer to print with up to 5 colors at the same time. With an easier calibration process, a new filament sensor, and a standalone filament buffer, the MMU2S is more reliable than ever before.

This product is supplied as a kit - you must assemble it by yourself!

Please note, the assembly manual for the MMU2S upgrade kit is available in digital form only.

Note for MK3 users, you also need to purchase the MK3/S to MK3S+ upgrade kit with the MMU2S.

Multi Material Upgrade 2S (MMU2S) is a brand new and improved version of the Multi Material Upgrade 2.0. With an easier calibration process, a new filament sensor, and a standalone filament buffer, the MMU2S is more reliable than ever before.

WITH THE ORIGINAL PRUSA MMU2S WE ARE INTRODUCING:

NEW FILAMENT SENSOR

With the MMU2S we managed to sense not only that the filament is present, but that it actually reached the Bondtech gears. The filament sensor detects when the idler doors open a bit as the filament pushes Bondtechs apart. MMU2S is much more reliable regarding reloading filaments and the calibration process is also simplified.

FILAMENT BUFFER

The MMU2S comes with the filament buffer, a device designed to prevent filament tangling during loading / unloading process. The buffer allows you to position the five filament spools more freely and also saves valuable space on your desk.

THOROUGHLY TESTED

The testing process of the MMU2S took 2 months to finish, we used 20 printers and we printed 478 test blocks designed to test frequent switching of all five filaments. The total value of filament changes was nearly 600.000. More than 93 % of this prints were successfully completed.

 

Multi Material Upgrade 2S (MMU2S) is the second generation of our unique multi-material addon, which enables your Original Prusa i3 MK2.5S or MK3S/+ 3D printer to print with up to 5 filaments at the same time.

Compared to MMU1, the new MMU2S went through a major revision, resulting in a simpler and more reliable design. The number of simultaneously supported filaments increased to a total of five, which enables the users to print even more complex and more colorful objects.

MMU2S comes with a redesigned body and a new filament loading mechanism. Instead of the previous Bowden system, the new unit uses a direct-drive feed and a single PTFE tube to lead the selected filament to the extruder. The motorized selector head has a F.I.N.D.A filament sensor and a built-in blade, which prevents filament jamming.

Read more about MMU2S in the announcement blog post at Prusaprinters.org and in this upgrade article.

 

SEE THE MMU2S IN ACTION!

Introducing MMU2S

How does MMU2S work?

MAIN FEATURES

The most significant new features of Original Prusa i3 MMU2S

COMPLETELY REDESIGNED

MMU2S has a brand new body with a rotating pulley barrel and a single extruder motor. Load up to 5 filaments and the selector head with a filament-cutting blade will take care of automatic loading and unloading.

FIVE MATERIALS

The second generation of our Multi Material Upgrade supports up to 5 filaments loaded at the same time. Apart from usual materials like ABS, PETG or PLA, the MMU 2.0 also works great with soluble supports (BVOH or PVA).

DIRECT DRIVE

We have replaced the previous generation's Bowden system with a new direct-drive mechanism. This change is a major step forward in making the filament loading process more reliable and less prone to jamming.

F.I.N.D.A FILAMENT SENSOR

Meet F.I.N.D.A! It's essentialy a repurposed P.I.N.D.A probe, which now serves as a filament sensor. It works on a mechanical basis - the string of filament lifts a small stainless steel ball and F.I.N.D.A detects its proximity.

WIPE INTO INFILL / OBJECT

Our slicing software Slic3r PE comes with full MMU 2.0 support and a set of useful features, such as Smart wipe tower, Wipe into infill or Wipe into object. These features help you save time and filament.

FILAMENT BUFFER INCLUDED

The MMU2S comes with the Filament Buffer, a device designed to prevent filament tangling during loading / unloading process. The buffer allows you to position the five filament spools more freely and also saves valuable space on your desk.

FULL FEATURES LIST

MULTI MATERIAL UPGRADE 2S FEATURES

  • Completely redesigned body: less complex and more reliable design
  • Printing with up to five filaments at the same time
  • Old Bowden system replaced with a direct-drive loading mechanism with only a single PTFE tube leading filament to the extruder
  • Less sensitive to filament quality
  • Second generation electronics
  • F.I.N.D.A. filament sensor
  • Motorized selector head with filament cutter
  • Power loss detection and recovery
  • Smart software features: Smart wipe tower, Wipe to infill, Wipe into object and many more
  • Works in two modes: Multi-Material Mode and Single Mode (Single mode is the same as printing on MK3S/2.5S).
  • Includes the Filament Buffer, a device designed to prevent filament tangling

COMPATIBILITY INFORMATION

Printer Compatibility:

  • Original Prusa i3 MK3 (with upgrade) and MK3S and MK3S+
  • Original Prusa i3 MK2.5S

Material Compatibility:

  • PLA
  • ABS
  • PETG
  • Soluble Materials (BVOH, PVA)

Reviews

14 reviews
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Jones Lisa
Jones Lisa4 days ago

Do not buy this product if you are going to use filament other than Prusa. I spend more time trying to fix the filament loading than printing. On power recover loss the heat bed went back to 60 but the nozzle remained at 0. This product needs redesigned when it comes to filament loading. It also loads filament when the selector is at a different slot. If the filament is not completely straight it will not load. This should of had a little cone shape to help with the loading. It just one thing after another with this product. Once it loads a color and you only print with that color then your fine. If everything is not perfect then you will have problems. I want to print not spend my time adjusting it.

Plattner Michael
Plattner Michael16 days ago

Since this upgrade I have about 200 failures on 1 print. Before that it was more like 1 failure every 200 prints. Absolutely not worth it if you don't want to tinker A LOT but IF you can get it to work it is a nice tool. My advice to every MMU2S owner: reprint the mmu2-idler.stl from ANY MATERIAL BUT PETG because it needs very good layer adhesion. Mine, printed in PLA works great!

Fredrick Jason
Fredrick Jason19 days ago

I bought this upgrade kit around the same time as purchasing my MK3S+. I spent time making sure my MK3S+ was printing great before attempting to complete the MMU2S upgrade. This kit is not for beginners; calibration of the sensors and tensioning were the most critical aspects to getting reliable loading and unloading. I had a few years of experience getting comfortable with calibration with my RepRap i3 box frame before transitioning to a MK3S. It is very satisfying to see filament being loaded and unloaded through the Bowden tube to the MK3S+ after spending time calibrating the MMU2S. I've been printing with PETG, PLA, and ABS. I was able to complete an 17 hour 4 color ABS print without interruption; very happy with this upgrade kit.

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