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MMU2S With Revo is AMAZING (thanks to prusa support)  

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Joe McLoughlin
(@joe-mcloughlin)
Active Member
MMU2S With Revo is AMAZING (thanks to prusa support)

Big thanks to Rodolfo from Prusa Support for all of his help. I had the worst MMU experience with the v6. It literally killed it by somehow carbonizing the PTFE tube in the heatbreak. With the Revo, however, I am getting literal perfect tips. They are perfectly loaded and unloaded from the machine. Again, I talked a few times with Rodolfo on different occasions, and he was amazingly helpful. If Prusa people look at this, he needs a raise after sitting with me, troubleshooting for hours. It finally works, here are his provided settings that just work! I am so happy that this unit finally works consistently for me! These settings, I have found, give the best results with the PLA at normal temps. It always unloads perfectly, and maybe with the v6 too? Don't have one to try it out on. Prusa Support is straight up the best support team I have ever encountered, and they are very knowledgeable

Filament settings:

This topic was modified 4 months ago by Joe McLoughlin
Posted : 07/06/2022 3:59 pm
Henry
(@henry-2)
Estimable Member
RE: MMU2S With Revo is AMAZING (thanks to prusa support)

Do you use these settings for all of the nozzles?

Posted : 08/06/2022 10:51 pm
Jason’s MMU
(@jasons-mmu)
Active Member
RE: MMU2S With Revo is AMAZING (thanks to prusa support)

I’ll have to give these settings a try. 

I’ve had some loading problems with the MMU2 in the past but fitting a Revo has inspired me to try harder to fix it. 
What temperature are you using for PLA? Does the brand matter? I’m using two colours from the same manufacturer at the moment.

I’m finding it will print for the first 20 layers or so before starting to get load failures and stringy tips.

I’m using the 0.8mm Revo nozzle. This makes for quicker prints. At the moment I’m doing small test pieces but maybe the length of time between changes is too short?

Thanks for your help

 

J

 

Posted : 15/06/2022 8:48 pm
DST
 DST
(@dst)
Eminent Member
RE: MMU2S With Revo is AMAZING (thanks to prusa support)

@joe-mcloughlin - in spring post. I’ve been on support for hours with the team and I’m told they can help me. I have mmu2 just installed and decided to install revo6 since my cartridge on v6 ripped off. 

I’m unable to get pass z cal for some reason. Filament is feeding in fine. Any idea?? I’m at wits end. Thanks! Goes up and then down as it reaches the bottom i get “Cal failed. Check axes and run again.

 

 

Mom, wife, career woman, tinkerer.

Posted : 26/07/2022 6:27 am
Joe McLoughlin
(@joe-mcloughlin)
Active Member
Topic starter answered:
RE:

Sorry, haven’t checked this post in a while.
trying to answer all questions.

Posted by: @henry-2

Do you use these settings for all of the nozzles?

Yes I do, and it seems to work great on all of them besides the .15. I have not tried it on the .15mm yet though, because I can’t find one in stock anywhere.

Posted by: @jasons-mmu

I’ll have to give these settings a try. 

I’ve had some loading problems with the MMU2 in the past but fitting a Revo has inspired me to try harder to fix it. 
What temperature are you using for PLA? Does the brand matter? I’m using two colours from the same manufacturer at the moment.

I’m finding it will print for the first 20 layers or so before starting to get load failures and stringy tips.

I’m using the 0.8mm Revo nozzle. This makes for quicker prints. At the moment I’m doing small test pieces but maybe the length of time between changes is too short?

Thanks for your help

 

J

 

I’m using just the stock prusament pla settings on all filament brands, and if it doesn’t start sticking after a few times I’ll turn the other layers bed temp to 70, which seems to work. I don’t think filament brand matters a ton, prusament, and random Amazon brands seem to all work the same. I haven’t done any huge things on the .8mm yet, but I think that might be a reason that it is not directly supported with the mmu doing color changes. I’ll try soon and let you know though. I have some tiny colors on layers with the .4 but it seems to work fine. I’ll try running that print with the .8 to see.

Posted by: @dst

@joe-mcloughlin - in spring post. I’ve been on support for hours with the team and I’m told they can help me. I have mmu2 just installed and decided to install revo6 since my cartridge on v6 ripped off. 

I’m unable to get pass z cal for some reason. Filament is feeding in fine. Any idea?? I’m at wits end. Thanks! Goes up and then down as it reaches the bottom i get “Cal failed. Check axes and run again.

 

 

Only thing I can think of is that the pinda probe might not be triggering, so I’d check that it does detect metal, and then see about if the heatsink is fully seated in the extruder body, and make sure that the Bowden tube is feeding it into the tall bit of the nozzle. Is the nozzle hanging too low like it is not screwed in all the way? I’ve found that sometimes filament can get stuck on the threads and it will not thread all the way, then making it lower than the pindas sensing distance, which will throw the error. I think what it could be is that the pinda will not sense the bed and there could be gunk on the z axes that will trigger its emergency end stop that makes it think the nozzle has hit the bed, so check the z axes to make sure there is no gunk on them and that the x carriage easily will go up and down. Final thing, is there any clicking noise when the extender tries to load the filament into the nozzle and do the ramming when it first loads?

This post was modified 2 months ago by Joe McLoughlin
Posted : 26/07/2022 3:34 pm
Swagga5aur
(@swagga5aur)
RE:

Hello Joe, 

Just wanted to say thanks for sharing the settings, used them with my MMU2S which I have never used before adding my revo and it just works with no issues currently.

Only tested with a 0.4mm nozzle and PLA for now.

Posted : 02/08/2022 5:30 pm
Jason’s MMU
(@jasons-mmu)
Active Member
RE: MMU2S With Revo is AMAZING (thanks to prusa support)

Sigh….. still having problems.

I’ve tried a few different models today, fairly small but with changes from layer 1. I’d say for the first 10-20 layers it changes fine then begins to fail on feeding into the hot end. The tips look reasonable, they maybe are a bit big in diameter (I need to measure a few).

The issue seems to be that the filament gets through the Bondtech gears and then sticks. It makes a juddering noise, I think from the stepper stalling rather than the gears grinding the filament. Maybe it gets through the PTFE and sticks at the heatsink or at the entry to the Revo?

Increasing the spring tension doesn’t seem to help.

A couple of times, as the filament triggered the IR sensor, I squeezed across the Bondtech gears quite hard and it gave a lot more traction to push it through. 

Next time it fails, maybe I’ll cool down, take out the Revo and see if it fits.

I’ll have another try tomorrow. 

Thanks,

Jason

 

Posted : 20/08/2022 9:27 pm
Jason’s MMU
(@jasons-mmu)
Active Member
RE: MMU2S With Revo is AMAZING (thanks to prusa support)

Well, I had a look at the filament tips I cut off yesterday. They are all around 2.10mm  in diameter.

The Revo is measuring 2.05mm at the entry. Unsurprising that the tips won’t feed into it. They don’t when cold.

Does anyone have any suggestions on how to solve this? 

Thanks again.

Posted : 21/08/2022 11:54 am
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