MK4 / MK3.5 / MK3.9 / MMU3 Announced!
Hello all;
What a wild ride it’s been over the last few weeks, and we are happy to announce all the good news. Make sure you go check out our blog post about our new MK4 (and the MK 3.5 / 3.9 variants) as well as the MMU3! Make sure to check it out so you have all the info on our new releases!
https://blog.prusa3d.com/announcing-original-prusa-mk4_76585/
Shane (AKA FromPrusa)
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
I am looking on your website to purchase the MMu2 to MMu3 Upgrade if possible or can I print out the upgrade? Please let me know. I am holding off buying the MK3 to MK4 upgrade until I find out how to upgrade to the MMU3 upgrade. I don't see that upgrade on your website yet but I see the MK3 to MK4 upgrade and it is in my cart but I am holding off purchasing until I find out about the MMU3 upgrade.
Thanks
Richard
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
Wow! Can't wait for the upgrade kit.
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
will the MMU3 work with prusa mk2.5s ?
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
YES!
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
Will the MMU3 be hard wired and require a lot of disassembly on the MK4 like it is on the MK3? I will definitely be getting the MK4 and MMU3 so trying to decide whether it makes sense to get the pre-assembled MK4 or not. Doesn’t make sense to get the pre assembled version if I have to take it mostly apart to install the MMU3
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
I'm curious to find out more details on what was changed with the buffer system.
I'm just about finished with a redesign of a custom buffer system... but I'd be delighted if the new "official" buffer for the MMU3 is a solid enough improvement to make my custom setup unnecessary.
Here's to hoping!
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
I think I can speak on behalf of a majority of MMU2S owners that it is a huge disappointment and an extremely poor product. Even after dozens of hours of tinkering, upgrades, and changes it can still barely function. What assurance do we have that the MMU3 is any better? The MMU2S went through "months of testing" and "over 600,000 tool changes". What truly differentiates the MMU3 from the disaster that was the MMU2S? I see there's "improved parts and electronics", but what does that even mean?
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
@keith
the pre-assembled can be more safe, but the kit makes you to know, how the printer works and you can lear a lot of things.
it is from experience, but your choice. 😉
even an old man can learn new things 🙂
Standard I3 mk3s, MMU2S, Prusa Enclosure, Fusion 360, PrusaSlicer, Windows 10
PRUSA MINI+ Prusalink + Prusa Connect
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
I'm on the fence about the MMU3. I have two MK3's, one of them with the MMU2S. I also preordered a 5 extruder XL on the first day preorders opened. I'm definitely going to upgrade the MK3 printers to MK4. I'm tempted to yank the MMU2 though. It took quite some time to get that working but I never count on it to work. And for doing prints with soluble filament you're basically stuck with PLA for it to work "reliably". The MMU2S -> MMU3 upgrade kit is only 89 bucks so it's not like there's a ton to lose, other than time messing with it.
Definitely looking foward to the new extruders though. I'm always afraid as hell to change nozzles with the MK3, the quick change nozzles will definitely be a welcome improvmement.
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
@grant-stein
I think the big "improvement" in mmu3 vs the MMU2s is the 2-way communication between the printer and the mmu. This is something I looked at in some non-prusa(tzb if I recall) firmware for the mmu. I never got as far as installing that though because I got the mmu to work well enough within what I feel is it's limitations.
Prusa mentions improvements in the filament buffers, but personally I've never used those. I still wouldn't expect the MMU to handle things like tpu for instance. That's a major downside for me. My wife has me print a lot of tpu things so basically I only have the non-mmu mk3 to do tpu stuff on. Yes, you CAN print tpu on an mmu enabled printer by bypassing the MMU by disconnecting power and manually loading the filament, but that's a bit of a hassle. I simply don't try to load tpu in the mmu enabled printer.
The whole design of the MMU, one extruder, multiple materials, is nothing more than a big kludge so even with revisions I'd never expect it to really work well. It's why I have a 5 extruder xl on preorder. That's really the RIGHT way to do multi-material and not blow HUGE amounts of filament in your purge block. I printed a baby yoda(grogu) holding a jack-o-lantern and that print was 2kg of filament, more than half of which was on the purge tower! I hate throwing a big block of spent filament in the trash like that.
the upgrade to mmu3 is only 89 bucks so... it's not like you're out 300. I may do it just for the hell of it, but I'm definitely on the fence about it.
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
As I said, I will most likely keep my MK3S/MMU2 as is for now.
I am, however, curious about two things.
1. The claimed reduction in print time. It seems to be very significant and I'm curious if there will be any tradeoff (as in print quality) on the faster prints.
2. The higher-resolution stepper and the vertical fine artifact reduction.
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
A detailed explanation of vfa can be found here
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
My concern is that my MMU2 is acting oddly like the board is not right- it doesn’t ‘home’ or seem to calibrate and forgets where it is. So the upgrade doesn’t sound like a good idea.
I’m with SSILL2 in that I have an XL coming with 5 heads- sometime…. I think the Mk3/4-MMU3 will be good for multi color PLA prints, but my true wish was some kind of true multi-material set up with Strong(CF), flex, clear and some support material.
Also, if I can get the MK3/4 with MMU on a network, being able to just select a material and print would be cool from my desk.
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
So I built my Mk3s from scratch, then later on installed the MMU2, so I definitely appreciate building it from scratch. I'm just curious if when ordering a pre-assembled MK4, if adding the MMU3 will require so much disassembly of the MK4 that it defeats the purpose of purchasing it pre-assembled. I guess I'm really asking is installing the MMU3 on the MK4 as much work as installing the MMU2 on the MK3s?
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
The MK4 seems more modular and plug and play. I know what you mean about the mk3, every change seemed like a new build and calibration.
RE:
I really question how 'plug and play' this really is, particularly in the new load cell, which will indeed get better Z accuracy.
My other printer (Ultimaker) has a load cell sensor on the Z axis, and it does require that the build plate is level within the ballpark in order to sense and adjust properly.
Although I'm sure that the MK4 and the XL will be excellent printers and will require less routine futzing around, I seriously doubt that they will approach the 'you press the button, it does the rest' simplicity.
The only printer I've ever been familiar with which does approach that is (was, I've heard it has been retired) the Uprint SE which was at our local makerspace. This was a highly proprietary closed system, with proprietary (translated: $$$) filament and single-use proprietary build plates. IIRC, when that machine was new it cost ca. US$27,000.
The MK4 seems more modular and plug and play. I know what you mean about the mk3, every change seemed like a new build and calibration.
RE: MK4 / MK3.5 / MK3.9 / MMU3 Announced!
The purge block is too small for the Buzz print in promo. Is that optimization or just the way the model is?
RE:
I think I can speak on behalf of a majority of MMU2S owners that it is a huge disappointment and an extremely poor product. Even after dozens of hours of tinkering, upgrades, and changes it can still barely function. What assurance do we have that the MMU3 is any better? The MMU2S went through "months of testing" and "over 600,000 tool changes". What truly differentiates the MMU3 from the disaster that was the MMU2S? I see there's "improved parts and electronics", but what does that even mean?
If the MMU2 barely functions, you haven't dialed it in correctly or identified your issues sufficiently. Very few if any upgrades are strictly necessary to get an MMU up and running reliably. The only mod I would wholeheartedly recommend is changing the bowden tubing from MMU to Extruder to a slightly wider inner diameter. I haven't seen any disadvantage to that and it makes "fat filament tips" a complete non-issue.
I think the main issue with the MMU is wrong expectations and that Prusa Marketing did not set the expectations right. The MMU2s is a tool that needs to be properly dialed in and people need to be ready to do some trouble shooting, and getting to understand the tool well enough. Once that is done, it actually works flawlessly and reliably. Contrary to rumors if you are lucky the MMU2s can also work like that right from the start, but you can not take that for granted. Some dialing in might be required.
The massive change for the MMU3 is that the MMU can now communicate two ways with the printer. That means the extremely crytpic error messages (with light signals) can now be now made non-cryptic via clear error message on the screen. Also because of the two communication, certain issues can be resolved by some printer routines, previously not possible due to the lack of communication. There seem to be also some hardware changes but I don't know in how far they will matter.
Mk3s MMU2s, Voron 0.1, Voron 2.4