antonio.d6
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Joined: Nov 10, 2018 10:07 am
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Flex material and water soluble supports

Nov 10, 2018 10:09 am

Hi guys,

this is my first topic here :) So hello to every one! :)

I would like to know if with this tool I can print flexible materials (like TPU) using also water soluble supports.

Thanks

markus.z
Posts: 5
Joined: Dec 21, 2017 7:20 pm

Re: Flex material and water soluble supports

Nov 10, 2018 4:16 pm

According to the MMUs 3d Printing Handbook (Version 1.01):

"MMU2 supports the most common materials (such as PLA, PETG and ABS) along with soluble materials (BVOH) from the start.
....we are working on expanding the range of supported materials (Flex and PVA+ coming soon)."

hope that ansers your question :)

antonio.d6
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Re: Flex material and water soluble supports

Nov 10, 2018 8:06 pm

Yes yes... so you will have a spurge tower, right?

georg.s2
Posts: 201
Joined: Sep 10, 2017 6:42 am
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Location: Austria
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Re: Flex material and water soluble supports

Nov 10, 2018 9:25 pm

I do not have the MMU, but in my humbly opinion the MMU is maybe great for multi-color prints, but very limited for printing different materials.

Purging the nozzle becomes more critical and the biggest issue IMHO is the fact that the nozzle has to change temperature everytime if you have materials with different printing temperature.

kawah.c
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Re: Flex material and water soluble supports

Nov 12, 2018 7:45 am

I tried soluble material but the result is not good.
I used eSun PVA, it caused lot of stringing and really not that soluble.
Stringing causes jamming.

May be other brand of PVA is better. Like to know other's experience too.

flaviu.i
Posts: 69
Joined: Feb 04, 2018 8:53 pm
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Re: Flex material and water soluble supports

Nov 12, 2018 10:58 am

Verbatim BVOH works ok with stock settings. But you need to print it out of a box with humidity below 10%.

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khalil.n
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Joined: May 07, 2017 5:24 am
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Re: Flex material and water soluble supports

Nov 12, 2018 4:44 pm

I plan to print PrimeSelect PVA+ from a drybox if Prusa would ever release a profile for it.

(its sold from their website - I left a comment, made a forum post, made a github issue)
Prusa MK3 preassembled (R2/B6) > (R3/B/7)
Prusa MK2.5 kit > MK3 > MK3+MMU2 (R3/B/7) :D
Prusa SL1 3D printer + Curing and Washing Machine (day1 order)
Taz6
CR10s4
Delta 3ku

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nikolai.r
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Joined: Nov 09, 2016 8:32 am
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Location: USA - California
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Re: Flex material and water soluble supports

Nov 12, 2018 5:12 pm

The hardware design is capable of handling real multi material with completely different print settings. But the software is not there, yet. For example the temperature switch is currently happening during ramming/cooling and obviously causing issue there. Slic3r developer are working already on it so I expect to see it working in the future.
Regarding TPU, I think it depends which grade. The softer ones will most likely not survive the current load/unload speeds but again, this is software controlled and solvable over time. At the end it's the same direct extrude like on regular MK3.

stephen.s27
Posts: 4
Joined: Aug 28, 2018 7:46 pm
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Re: Flex material and water soluble supports

Nov 16, 2018 3:51 pm

I hope they solve this soon. I have some PVA and I am really looking forward to using it with the MMU 2 on our Mk3.

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