(Un)original Prusa Dry Box and MMU3 Buffer
Hi everybody,
Proud owner of a MK4 and her MMU3 , the (Un)original Prusa dry box is really tempting me.
So far, the only thing i hate with my set up is the buffer. I tried to get rid of it but in my case (bad placement of the spools) its making the MMU to fail every time.
When i look at the description of this drybox, i see that we do not longer have to use the buffer.
I also see that the PTFE lines from the Drybox to the MMU are quite a bit longer than what is used originaly.
Is someone here having this type of set up ? Any feedback ?
Thanks
Woody
RE: (Un)original Prusa Dry Box and MMU3 Buffer
Hai Woody
That's nearly the same setup in my basement.
I replaced the big buffer with the auto spool rewinder:
https://www.printables.com/de/model/702217-mmu3-2s-5-spool-auto-rewinder-adapter-for-unorigin
You'll find also a coupler for the PTFE tubes (it's placed in the middle of the box - see picture on link). So you can use shorter tubes. But i'm not happy with that plastic PTFE connector. I'm waiting for metal PTFE connectors (see that small black piece on the Enclosure). I used that wall mount, doubled it so i can screw 5 PTFE connectors on each side.
I think no spool rewinder is a bad idea. On a color change, the MMU3 push the filament back to the spool (a little bit more than the length of the PTFE tube from the MMU3 <> Nextruder). So it's possible, that those filament fall down left or right from the spool. And on the next change to that color, you get a jam...
I also replaced the axis holder on top right (orange) with that one:
https://www.printables.com/de/model/575514-prusa-mk4-filament-guide-right-side-for-ptfe-m10-c
So i can use the spool holder (front/right) for special filaments. Just change the PTFE tube from the MMU3 to the connector on the right side.
Hope that helps 🙂
Greetings from switzerland
Mike
RE:
Thanks for your reply
Wow your set up is super elegant !
My plan would be to put the DryBox under the bench where my machine is locate. So do you think if i go with longer PTFE tubes plus the auto spool rewinder it should work ? I see that there is a hole inside the Drybox, under the spools, my plan would be to get out by there, going behind the Box all the way up direction the MMU3
EDIT : Forgot to ask, with thoose auto rewinders. Are the spools easily changeable ?
Greeting from France
Woody
RE: (Un)original Prusa Dry Box and MMU3 Buffer
Thanks 🙂
You can check that with your existing setup. Just replace the tube with a long tube (as long as you plan to use). If it works - it works :-). Take a good quality to reduce the friction as much as possible.
And yes, it's easy to change a spool with the rewinder. It has a long rod which points upwards. This can be used to conveniently pull everything upwards and then forwards (helps also when inserting it into the grooves). Definitly faster to change than with the original buffer.
Mike