Notifications
Clear all

Multi Material 2.0 material type support  

  RSS
pierre.c11
(@pierre-c11)
New Member
Multi Material 2.0 material type support

Does Multi Material 2.0 support flexible material? I red it wasn't possible with version 1 but I'm interesting in combining prints with Nylon and TPU. Temperature may be an issue. Is there any work around or any possibilities? Thanks for your help

Posted : 11/05/2018 9:33 am
Crunch
(@crunch)
Estimable Member
Re: Multi Material 2.0 material type support

I think that is unknown at this time I have not been able to find a video of the MMU2 running any material

The Latest Firmware can be found here https://github.com/prusa3d/Prusa-Firmware/releases
Open Firmware Issues https://github.com/prusa3d/Prusa-Firmware/issues...
Posted : 11/05/2018 8:50 pm
Koen Kooi
(@koen-kooi)
Eminent Member
Re: Multi Material 2.0 material type support

The MMU2 extruder design is the same as the MK3 stock design, so in theory it should support the same materials as a stock MK3.

Posted : 12/05/2018 4:11 pm
robert.l35
(@robert-l35)
New Member
Re: Multi Material 2.0 material type support

I feel like at least in the 1.0 version, that flexible materials will be a problem with a long tube. Seems Like there is still a tube of some distance between the drive and the print head.

Posted : 13/05/2018 5:23 pm
Koen Kooi
(@koen-kooi)
Eminent Member
Re: Multi Material 2.0 material type support


I feel like at least in the 1.0 version, that flexible materials will be a problem with a long tube. Seems Like there is still a tube of some distance between the drive and the print head.

Yeah, about 4 cm/1.5 inches.

Posted : 14/05/2018 10:03 am
Lichtjaeger
(@lichtjaeger)
Noble Member
Re: Multi Material 2.0 material type support

There is an active debate about this topic on the MK3 forum.

If it works for MK3 it should also work for MK3 MMU.

In addition: There are optimzed bowden tubes for flexible fillaments. With them it should be much easier.

Posted : 14/05/2018 11:14 am
eric.k4
(@eric-k4)
Reputable Member
Re: Multi Material 2.0 material type support



I feel like at least in the 1.0 version, that flexible materials will be a problem with a long tube. Seems Like there is still a tube of some distance between the drive and the print head.

Yeah, about 4 cm/1.5 inches.

1.5 inches? it needs to reach from z-max (assuming it mounts on TOP of the machine) to the extruder at Z-min.... it will be as long as an MMU V1 Tube.

Posted : 15/05/2018 7:45 pm
PJR
 PJR
(@pjr)
Moderator
Re: Multi Material 2.0 material type support


1.5 inches? it needs to reach from z-max (assuming it mounts on TOP of the machine) to the extruder at Z-min.... it will be as long as an MMU V1 Tube.

No. The main filament drive pulley is much the same as the Mk3 (about 100mm above the nozzle) and filament loading pulleys on top of the frame, with a single PTFE tube from the selectable loading pulley to the main drive pulley.

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…...
Posted : 15/05/2018 10:32 pm
pierre.c11
(@pierre-c11)
New Member
Topic starter answered:
Re: Multi Material 2.0 material type support

Any update on this?

Posted : 05/07/2018 5:40 pm
bobstro
(@bobstro)
Illustrious Member
Re: Multi Material 2.0 material type support

[Edit: Realized the update requested was on flexibles, not the function of the MMU v2 itself. Never mind.]

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 05/07/2018 6:15 pm
Laird Popkin
(@laird-popkin)
Estimable Member
Re: Multi Material 2.0 material type support



1.5 inches? it needs to reach from z-max (assuming it mounts on TOP of the machine) to the extruder at Z-min.... it will be as long as an MMU V1 Tube.

No. The main filament drive pulley is much the same as the Mk3 (about 100mm above the nozzle) and filament loading pulleys on top of the frame, with a single PTFE tube from the selectable loading pulley to the main drive pulley.

Peter

From several other printers that I print flexible filaments on, the issue isn't primarily the distance, it's that the filament path is enclosed. The extruder design my Mk3 shipped with has a fair amount of air around the drive gear, so TPU (NinjaFlex, etc) tend to pop out the side unless I print quite slowly. There's a modified design posted to the forums that I've printed but not installed which encloses above and below the drive gear, which should work a lot better with TPU. The extruder is the same for the standard as for the MMU 2.0, so I'd expect that the same design should work for the MMU, too.

The original MMU design was bowden drive, which really doesn't work with flexible filament, so I am very excited about the MMU 2.0.

The other factor in mixing filament types is which materials bond. Nylon doesn't really bond with anything else - it's super slick! But I've had NinjaFlex bond well with ABS and fairly well with PLA.

With Nylon, you can control flexibility by physical design - a thick part is relatively rigid, while a thin section is flexible, so you can make (for example) a rigid finger with flexible joints, all out of Nylon.

...
Posted : 08/07/2018 6:14 pm
Share: