RE: Core One MMU3 Prototypes
In may or "in may" ?
I was told by chat support today, that the MMU3 for CoreOne is expected to be released in May.
RE:
the 30th May* 🙂
In may or "in may" ?
I was told by chat support today, that the MMU3 for CoreOne is expected to be released in May.
*31th is a Sunday, haha
RE: Core One MMU3 Prototypes
The right side of my printer is against the wall, so no access to the spool holder. I ended up installing a longer length PTFE to the side filament sensor instead, which is fed via the spool located on top of the printer.
I want to maintain easy access to the MMU3 for servicing and for times when things get 'stuck' every now and then, so I'm now leaning towards option 1, placing the spools/buffer on the shelf, and the MMU3 on top of the printer in a cover........
I do like option 2, which is very neat, but I'm concerned about MMU3 access mid print should anything misfeed etc.....
RE: Core One MMU3 Prototypes
Southwest Florida here. And my printers are in a non-climate controlled garage. That said I do have pretty good luck with dehydrators while printing. Make Option 2 a dehydrator or an upgrade path to make it a dehydrator and they would have something.
RE: Core One MMU3 Prototypes
Why not offer both options? Some need to stack something on top of the printer, others not.
RE: Core One MMU3 Prototypes
Both options should be offered, the second option as an premium/upgrade. The current MMU3 System is the worst solution on the market when it comes to space requirement, looks, ease of use. Yes it's cheap to manufacture and reliable but it looks like a diy solution from 4 years ago, and that alone makes it commercially not optimal.
If you have doubts just look at Anycubic Kobra 3 with ACE, a printer with AMS that costs less than MMU3 alone, the world moved on, and Prusa needs to catch up.
RE: Core One MMU3 Prototypes
I had removed my existing MMU3 from my MK4s and converted it back to stock in preparation for moving the MMU to my Core One when ready. However, I'm now considering keeping my MK4s as my 'colour machine' and leaving the Core One as a single colour. I only print bits as a hobbyist and generally use PLA for most colour based models anyways.......will see what the Core One compatibility adds before confirming, but this now seems more likely for me......
RE: Core One MMU3 Prototypes
For those interested, I recovered the MMU3 from my MK4S and mounted it on my CORE ONE. The MMU3 is now functional; I made some adaptations while waiting for the official version from Prusa Research ( https://www.printables.com/model/1283543-prusa-core-one-mmu3-install-and-mmu3-setup).
RE: Core One MMU3 Prototypes
For those interested, I recovered the MMU3 from my MK4S and mounted it on my CORE ONE. The MMU3 is now functional; I made some adaptations while waiting for the official version from Prusa Research ( https://www.printables.com/model/1283543-prusa-core-one-mmu3-install-and-mmu3-setup).
Corrected Link - https://www.printables.com/model/1283543-prusa-core-one-mmu3-install-and-mmu3-setup
MK4S/MMU3
RE: Core One MMU3 Prototypes
For those interested, I recovered the MMU3 from my MK4S and mounted it on my CORE ONE. The MMU3 is now functional; I made some adaptations while waiting for the official version from Prusa Research ( https://www.printables.com/model/1283543-prusa-core-one-mmu3-install-and-mmu3-setup).
Corrected Link - https://www.printables.com/model/1283543-prusa-core-one-mmu3-install-and-mmu3-setup
Looks good!
So does the MMU3 bypass the side filament sensor completely and head straight from selector to extruder?
I assume you also completed the Nextruder mods (plate/sensor/idler latch) too?
RE: Core One MMU3 Prototypes
I used the original PTFE tube from the CORE ONE; it no longer goes through the side filament sensor, which is no longer used. In the MMU3 context, the side filament sensor is ignored. The PTFE tube therefore goes directly from the MMU3 to the Nextruder.It is indeed essential to modify the Nextruder (plate/sensor/return latch) as on the MK4S.
RE:
I like the idea of the printed rail to hang the MMU on. In my case it would suit me to be able to hang it from the top-right frame rail, rather than the top-rear, but there are no holes in the top-right frame rail. However I think I'm right in saying that those two frame rails can be swapped. In my setup the MMU would be a lot more accessible on the side than having to reach up to the back of the printer.
With the MMU hanging from the right, the path to the Nextruder might even work through the existing feed point in the side handle. If not, the side handle could probably be modified to provide a smoother path, and avoid the need to cut any plastic panels.
I'm not so sure about the cable path to the Buddy board though - I'm not convinced it would reach. Time for a bit of measuring.
RE: Core One MMU3 Prototypes
I like the idea of the printed rail to hang the MMU on. In my case it would suit me to be able to hang it from the top-right frame rail, rather than the top-rear, but there are no holes in the top-right frame rail. However I think I'm right in saying that those two frame rails can be swapped. In my setup the MMU would be a lot more accessible on the side than having to reach up to the back of the printer.
With the MMU hanging from the right, the path to the Nextruder might even work through the existing feed point in the side handle. If not, the side handle could probably be modified to provide a smoother path, and avoid the need to cut any plastic panels.
I'm not so sure about the cable path to the Buddy board though - I'm not convinced it would reach. Time for a bit of measuring.
You can simply remove the top frame and rotate it. Its perfectly square. Ask me how I know! lol
RE: Core One MMU3 Prototypes
The rear metal cable cover already has a hole for the MMU3 cable.
RE: Core One MMU3 Prototypes
You can simply remove the top frame and rotate it. Its perfectly square. Ask me how I know! lol
🤣 👍
RE: Core One MMU3 Prototypes
The rear metal cable cover already has a hole for the MMU3 cable.
Yes, I spotted that. I'm just not convinced that the path to that cutout from the right side would be as short as it is from the rear. Easy enough to check though.
I had to consult the build instructions to remind myself what the filament hole in the side panel looks like. It's obviously cut to suit the filament sensor position/angle, but since it's elongated I think there's scope to modify the handle to provide a slightly kinder path for the PTFE tube. Although on closer inspection I think the PTFE route wouldn't be too bad as it is - if the tube from the MMU was directed towards the front of the printer and then looped back towards the handle, the existing angle through the handle might be ok. In fact I think the small feed tube in the handle could just be replaced by the bowden tube from the MMU.
RE: Core One MMU3 Prototypes
Currently I have replaced the small PTFE tube in the right handle with a longer tube so that I can place my spool on a shelf above my printer (my printer right side is against a wall so I cant place spools there). Hence my idea was to just feed the tube from the MMU3 selector straight into the side handle area also. The only issue is the length between MMU selector to the extruder is longer, which will result in more material in the buffer.....meaning the current Prusa Buffer isnt big enough........
Then again, I'm thinking of just keeping my MK4s and putting the MMU3 back on that as my multicolour printer!
RE: Core One MMU3 Prototypes
I'm in the same boat - I have a nice working MMU setup on my MK4 inside an enclosure, so I have no great urge to move the MMU to the CORE One. I'm looking forward to Prusa's solution though, particularly with respect to spool management.
But in the meantime, I'm really impressed with Daniel's solution and it's grabbed my interest. I'm currently printing his mounting rail with a view to doing a test fit, checking cable lengths, PTFE routing etc.
RE:
I also have spools of filament on the shelf; To maintain the side-feed of the filament (in the context without the MMU3 on my first CORE ONE), I designed this accessory: https://www.printables.com/model/1227702-prusa-core-one-top-filament-guide
Furthermore, with the MMU3, the length of the PFTE tube is longer with the CORE ONE than with the MK4 (71cm instead of 36cm). The PRUSA buffer does not allow for such a long length of filament. So I designed this second accessory (for my second CORE ONE with MMU3): https://www.printables.com/model/1284666-prusa-core-one-mmu3-buffer
RE: Core One MMU3 Prototypes
I might have had a similar experience with the bottom...