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Should I print the new extruder pieces?  

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Paul Meyer
(@paul-meyer)
Honorable Member
Should I print the new extruder pieces?

Does the MMUv2 come with the latest version of the extruder pieces?

I'm assuming it uses your existing extruder, and only adds new feed mechanism on top. If that is the case, I may want to rebuild my extruder now (and get it dialed in) before attaching the MMU.

Can anybody that received their kit comment?

Paul

Postato : 30/08/2018 4:23 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
Re: Should I print the new extruder pieces?

To the best of my knowledge the kit includes R3 extruder parts.
Regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Postato : 30/08/2018 4:36 pm
Paul Meyer
(@paul-meyer)
Honorable Member
Topic starter answered:
Re: Should I print the new extruder pieces?

Reading the (newly posted) mmu2 upgrade instructions, it appears the new extruder pieces are included, and they do recommend upgrading.

Paul

Postato : 30/08/2018 8:36 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Should I print the new extruder pieces?


Reading the (newly posted) mmu2 upgrade instructions, it appears the new extruder pieces are included, and they do recommend upgrading.

Paul

It's pretty much essential that you upgrade to those parts.

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…

Postato : 30/08/2018 9:00 pm
Paul Meyer
(@paul-meyer)
Honorable Member
Topic starter answered:
Re: Should I print the new extruder pieces?

I had planned to upgrade, and printed out the parts in July. Even dug out some ABS and dialed it in. Then I realized it would make sense to wait and do it with the MMU upgrade.

The fact that official parts ship with the upgrade is a nice bonus.

Postato : 30/08/2018 9:36 pm
MikiCab
(@mikicab)
Reputable Member
Re: Should I print the new extruder pieces?

I have been changing colors so I have been printing new parts. I prefer yellow.

Postato : 31/08/2018 4:32 am
bobstro
(@bobstro)
Illustrious Member
Re: Should I print the new extruder pieces?


[...] It's pretty much essential that you upgrade to those parts.
Ugh. My printer has been fine, and I'm more worried about noise. I was pleased to see that the MMU2 fit without a lot of re-work.

I don't want to deal with ABS. Has anybody tried Colorfabb HT for the fan shroud?

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

Postato : 31/08/2018 8:19 am
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Should I print the new extruder pieces?


I don't want to deal with ABS. Has anybody tried Colorfabb HT for the fan shroud?

The old extruder parts create more friction in the filament path than necessary. As a consequence, the motor power is higher than it needs to be, which leads to hotter motor and that heats up the Bondtech drive pulley (you see where we are going with this...).

Just print the parts with PLA. I have and they work just fine. Even the fan outlet.

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…

Postato : 31/08/2018 10:21 am
Flaviu
(@flaviu)
Estimable Member
Re: Should I print the new extruder pieces?



[...] It's pretty much essential that you upgrade to those parts.
Ugh. My printer has been fine, and I'm more worried about noise. I was pleased to see that the MMU2 fit without a lot of re-work.

I don't want to deal with ABS. Has anybody tried Colorfabb HT for the fan shroud?

I've printed all the new R3 parts with Colorfabb's HT. Yesterday I printed with the new version some parts with Polycarbonate-CFK (3DXTech) filament at 295°C. Everything worked fine.

Postato : 31/08/2018 11:56 am
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Should I print the new extruder pieces?

Fillamentum Ruby/Red and PR White - both PLA, running for 4 weeks non-stop.

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…

Postato : 31/08/2018 12:10 pm
bobstro
(@bobstro)
Illustrious Member
Re: Should I print the new extruder pieces?


Fillamentum Ruby/Red and PR White - both PLA, running for 4 weeks non-stop.
Interesting. I've got PETG, NGEN and XT available. I was concerned after reading about the nozzle needing to be ABS. Thanks for the confirmation. I'll give it a go with NGEN most likely.

Sorry to be dense, but reading the previous few posts: I've got the MMU2 on order. Does it include the R3 parts in the box, or does it require that I print the R3 parts before use, or neither? I understand that the redesign improves filament and air flow but my Mk3 is printing very nicely and (most importantly) quietly. I'm hesitant to upgrade if it's not really required.

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

Postato : 31/08/2018 6:10 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Should I print the new extruder pieces?


I've got the MMU2 on order. Does it include the R3 parts in the box, or does it require that I print the R3 parts before use, or neither? I understand that the redesign improves filament and air flow but my Mk3 is printing very nicely and (most importantly) quietly. I'm hesitant to upgrade if it's not really required.

The R3 parts are included in the MMU2 upgrade. You can wait if you want, or you could save a couple of hours when you receive the kit and do it now. If you do decide to do it now, then you would get the benefits immediately 😉

You could also fix your nozzle gap at the same time.

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…

Postato : 31/08/2018 6:16 pm
bobstro
(@bobstro)
Illustrious Member
Re: Should I print the new extruder pieces?


[...] The R3 parts are included in the MMU2 upgrade. You can wait if you want, or you could save a couple of hours when you receive the kit and do it now. If you do decide to do it now, then you would get the benefits immediately 😉
Great to know, thanks! I had no idea the new parts would be included. The R3 upgrade is on my "someday" list, but might as well save it for a big project. My schedule for the next few weeks will give me a little time to print, but I'd rather not be working on the printer.

You could also fix your nozzle gap at the same time.It feels so strange, but I'm very happy with my Mk3 as it was delivered out-of-the-box. I've printed a range of materials and models sliced with a range of slicers using a range of nozzles and it's worked like a champ. I was going to wait for R4 parts or just sit for a bit after reading about increased noise levels and questions about the fan airflow over the part. Not that I'm overly concerned, just not in a rush?

  • Do the Prusa R3 upgrades result in more noise? I like mine really quiet, though without using stealth mode.

  • I keep running across fan shroud "improvements" online, then read that testing shows the Prusa design is actually better. Is the R3 shroud design producing good results?
  • 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

    Postato : 31/08/2018 6:46 pm
    PJR
     PJR
    (@pjr)
    Antient Member Moderator
    Re: Should I print the new extruder pieces?

    There more info in this post: https://shop.prusa3d.com/forum/hardware-firmware-and-software-help-f56/mmu2-troubleshooting-t24123.html#p105065

    During beta-testing, it was found that the V6 were being incorrectly assembled and shipped out with a nozzle gap up to 1.5 mm. This is not good under any circumstances and really should be fixed, but it must be fixed for MMU2.

    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…

    Postato : 31/08/2018 8:32 pm
    Chris
    (@chris-50)
    Eminent Member
    Re: Should I print the new extruder pieces?



    I don't want to deal with ABS. Has anybody tried Colorfabb HT for the fan shroud?

    The old extruder parts create more friction in the filament path than necessary. As a consequence, the motor power is higher than it needs to be, which leads to hotter motor and that heats up the Bondtech drive pulley (you see where we are going with this...).

    Just print the parts with PLA. I have and they work just fine. Even the fan outlet.

    Peter

    In reading all the extruder clicking threads, I never saw anyone mention the lowered friction for R3; I only saw mentions of the increased fan efficiency but that would make sense about the firmware update for the lowered stepper currect. I love reading the input from the community, even though my printer is sitting in a DHL truck or plane somewhere in Europe, I'm absorbing all this great knowledge.

    Postato : 31/08/2018 10:08 pm
    PJR
     PJR
    (@pjr)
    Antient Member Moderator
    Re: Should I print the new extruder pieces?


    In reading all the extruder clicking threads, I never saw anyone mention the lowered friction for R3; I only saw mentions of the increased fan efficiency but that would make sense about the firmware update for the lowered stepper currect. I love reading the input from the community, even though my printer is sitting in a DHL truck or plane somewhere in Europe, I'm absorbing all this great knowledge.

    The feed is offset by 0.25mm ;(

    Running with E-power set to 20 (30+ was previous default) for both running and holding.

    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…

    Postato : 31/08/2018 10:37 pm
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