ignacio.h
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Joined: Nov 29, 2017 11:53 pm
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Smoother filament flow

Jan 13, 2019 7:46 pm

Hello,

I just mounted my MMU2 over the weekend and found the filament flow was not smooth enough. I noticed the s-holder-a was not aligned with s-holder-b and that was the source of some sounds while the filament is pulled to the extruder.

I decided to create a new s-holder-X thing, but finally applied the KISS principle (Keep It Simple and Stupid) and created this replacement of s-holder-a part.
mmu2-s-holder-base v3.png
s-holder-a modified
mmu2-s-holder-base v3.png (78.05 KiB) Viewed 103 times
You can access and download the piece from here: https://a360.co/2TN25Q1

Now the filament can flow smoothly to the extruder and the loop is created when the filament is retracted as usual.

Hope you find it useful, I just wanted to share it in case you are interested.

Regards
Ignacio

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PJR
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Re: Smoother filament flow

Jan 14, 2019 8:59 am

ignacio.h wrote:
Jan 13, 2019 7:46 pm
I noticed the s-holder-a was not aligned with s-holder-b
It is not supposed to be aligned - this was designed to prevent the filament feeding back onto the spool. If they are aligned, then backfeed can happen.

However, you will see that there are plenty of alternatives in the forums here which do exactly what you are looking for. I think it is a general agreement that the spool holders and their feed are one of the first things to change.

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 or loss.

ignacio.h
Posts: 3
Joined: Nov 29, 2017 11:53 pm
Contact: Send private message

Re: Smoother filament flow

Jan 14, 2019 9:17 pm

Hi Peter,

Yes, I agree with you it must not be fully aligned. My mod is not fully aligned but a little bit more aligned to allow smooth filament transfer than the original one.

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