Attempting to Simplify the MMU3 Buffer Setup
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- Опубликовано: 24 авг 2024
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I know others have already suggested auto rewind, and I concur. My auto rewind setup is exactly what you were trying to accomplish by removing the buffer and has been 100% reliable
That's great to hear! Thanks!
Yeah auto rewind spools are my best guess for solving your problem there.
Thank you!
The space this thing takes up is huge. Would love to see a setting where the spools are mounted behind it on a wall like on a pegwall.
Same. Above should be easier to load. I'll see what setups work out. Thanks!
@@tada3dprinting I have my MK4 on the top shelf of an IKEA Omar wire rack. Filament is on the rack underneath.
The original spool holders are super annoying, though, so I'm hoping to replace them with the Filler modular holders if I can find/make one that will hang off the top racks.
I'm using the "MMU3 Loading Fork MK2" from printables, it is really easy to load the filaments with this tool.
+1 for the loading fork, it simplifies the loading process a ton so you don’t even need to take out the cassette wheels. I use that in combination with a horizontal stackable spool holder I found on printables to really minimize the amount of space the whole setup takes
Oh those both sound great! For the horizontal spool holder, what's the name of the one you use? Thanks!
@@tada3dprinting The spool holder I use is called ""Stackable horizontal spool holder" by Thadd Seldan. I did need to drill out the holes for the screws to secure the bearings in place, as well as use some leftover foam pads from the mmu spool holders to keep it from sliding. There might be better versions out there, but it works well for me
Get an enclosure and then its possible to screw the buffer to the top and the spools inside the enclosure. It took a bit of work but my entire setup is now contained within the enclosure!
Oh that does sound nice. Thanks!
I recommend using small pieces of PTFE in the MMU (10cm should be enough) that just create a resistance there so the filaments don't come out but I don't have to use the buffer anymore.
I did try that but still had errors. But maybe I could try it again with more full rolls and see if that helps too. Thanks!
@@tada3dprinting I did not have any problems even with empty rolls.... interesting...
Try hanging the spools, either on the wall or under the desk. It looked like your filament was getting tangled on retraction causing issues when it would reload. I don't like those little edge rollers that are provided. Using a spool holder through the middle of the spool reduces friction and reliability of unwinding the filament IMO.
Ok thank you!
Check out the RMU buffer instead. It's what I use. You'll have to print the parts and buy the hardware for it. It mounts to the left side of the printer and eliminates a good amount of space taken up by the original buffer. The original RMU files are paid files, but you can find "inspired by" files on printables. Also, check out Chris Riley's video on it.
That's exactly what I had to say... Take a look in the RMU buffer.
Ok thank you!
What works/worked for me:
- gravity spool holders
- an "air buffer", with spool mounted above the MMU where there is just a little PTFE fixed to something (a piece of wood) on the spool side to prevent feed back towards the spools that causes unwinding on the spool.
Ok yeah that makes sense. Thank you!
I’ve been using the (un)original prusa dry box rewinder system without the box itself. I installed a Reprack above my printer, and it’s been working flawlessly for the last month or so. Never had any feeding errors.
Good to hear! Thanks!
Check out the rattle-free idler on printables if your idler bearings rattle noisily.
Thank you
As far as what I personally do, there it a model called 'MMU3 Loading Fork MK2" on Printables that allows you to load the buffer without taking out the cassettes, which is really useful especially since I use an enclosure. I place the filament units on top of the enclosure.
Ok thanks so much!
The Prusa MM experience. Until it's sold on eBay.
Great video! I’ve been dragging my feet videoing my set up which might add to the dialogue. I totally hear ya on removing and replacing filaments 🙂
Thank you!
I'm having the same issue
It really takes a lot of time to mount all the rolls of filament, and wait for it to work correctly
I'll wait the news from you to make the mmu a little more reliable
Keep up the good work!
Thanks so much!
If you need to cancel a filament load, press the center button on the MMU.
I too wish there was a button on the printer’s screen, but the MMU button works fine.
Thanks so much!
oh woman, sometimes I think I chose wrong, between mk4 and the bambu lab x1 carbon with AMS, this takes up a lot of space!!!
I agree it does. But if you only have one printer, it's not too bad. Thanks!
DO NOT USE REWINDERS! You will regret it. There are a lot of better buffer options. My favorite is the Filament Retract Bank by TNDave. I'll try to post a link in a following comment to a video I made showing how easy it is to load. It's THE easiest MMU buffer system to load, bar none. It can be set up like I did, or in a bank together like the Prusa one. Ignore any recommendations for the RMU or a hundred different cartridge based buffers. You will not be sorry.
ruclips.net/video/XWpAd4XuHk8/видео.html
Oh that's interesting that he also mounts the MMU3 up a little bit above the printer too. I'm sure that helps with the angle of the tubes. Thanks so much!
That looks very promising.
Have you used it with the MMU3 and MK4?
Prusa has changed the filament buffer for the MMU3/MK4 compared to the MMU3/MK3.
I use the MMU3 without the buffer.
But I would choose this one if I needed one.
Yes my MK3/MMU3 worked pretty decent without a buffer. This new MK4/MMU3 is definitely more finicky without the buffer. I'll have to see if this will fit on my shelf or I'll need to mount it separate. Thanks!
It's absurd you have to jump through all these hoops, relying on third-party designs, just to get the basic functionality from the allegedly finished product you already paid for.
This is an excellent topic. Reminds me of magnetic tape handling on old computers. I wonder if similar solutions would work for filament. I also like the auto rewinding spools but they seem to get complicated.
Thank you!
I had issues with auto-rewind spools with the MMU3 - it felt like the retraction distances were different between MMU2s and MMU3, and the auto-rewind spools were pulling the filament too far back and out of the MMU3 unit... thus causing failures.
Good luck.
Oh no! That's annoying!
I am looking forward to your testing. There seem to be some good suggestions here. There must be a better way.
Thanks so much!
For me the (integrated) auto rewind rewind spool holders work well, a few weeks now. I don't know how long the printed springs keep their springyness but so far so good. I can help you with that, mail some tips, links and pictures if you like.
Sure send me an email with the info. Tada3dprinting@gmail.com. Thanks so much!
I have figured out that when I have an error preloading the filament to the MMU I can press the center button on the MMU to cancel or I can skip to the next one by doing what you did and clicking the selector.
I wish they had some of this more clearly displayed on the MK4 screen. I think they started by copying the MMU features from the old 8-bit MK3 system to the MK4 but they can clearly do a lot more by updating the MK4 firmware to be more clear.
Oh that's good to know. I'll check that out. Thanks!
I cant help but think a more ideal buffer design would just have a loose track for the filament to go through such that you wouldnt need all that faffing about. Im surprised the design is so finnicky.
I agree. I am trying out a third party design. I'll post soon. Thanks!
The MMU system looks absolutely chaotic. How is this Prusa's solution for multimaterial?
I really feel like it hasn't changed since the OG MMU? The lack of a motor to load to the filament is irritating. I am working on an aftermarket setup and will post soon. Thanks!
Been running my MMU2 and 3 for years with no buffer. I just have a ~15cm ptfe at the rear of MMU to void the filament falling back… it works for me. Wonder why not for you…?
I'm not sure if the filament rolls being low was a factor. My MMU3 with MK3 did ok without. Makes me wonder if the MK4 is more touchy. Thanks!
I use the slot buffer, its slightly less annoying to load
Interesting. Is it still a pretty similar size footprint? Thanks!
@@tada3dprinting true, I hanged it on an ikea skadis pegboard with the filaments above. Previously i had all auto rewind spoolholders and they worked, but with cardboard rolls I experienced issues but maybe that was just my setup.
I've had the MMU2 since it was in beta testing and have tried many times to get rid of the buffer. It just seems to be a necessary annoyance...
Seen BambuLab?
Thank you!
I don't own a MMU3 but I wanna buy one, and I would definetely try something without the buffer like autorewind Spool, I just don't know if this will also work reliable, so I would apreciate if you show your solution.
:)
Thank you! I'll make sure to record the process. Thanks!
For a real adventure, try the MMU with an enclosure! (No, don't try it, it's a real pain in the ass.)
Good to know! I do have the enclosure for the XL in a box. Need to find the time to put it together! Thanks!
Well the answer is simple. Don't try to be smart, and keep the buff. :-). Lover your videos.
Haha yeah just leave it alone right? Thanks!
I have bought 2 x SUNLU S4, and connected them to the buffer. It works very well.
She doesn't want the buffer. Nobody wants the buffer.
A smaller footprint for the rolls would be nice too. Thanks!
@@tada3dprinting how about making a fillament manager system in a table below the printer. An upside down AmS.
I've already thought of something similar. There's plenty of room at the top. Place an ikea lack or similar over the printer
Place the buffer on the underside of the plate and the filament rolls on the upper side.
Ikea Lack would suffice and is cheap.