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fuchsr
(@fuchsr)
Famed Member
Fan shroud upgrade?

I came across this thread on Reddit that discusses different fan shroud designs. So far I've always simply used the stock shroud design (albeit printed in PC Blend) and haven't really seen any issues but reading the Reddit post I was wondering if anyone here has tried different shrouds and noticed any *meaningful* differences.

I have a new Mk3S+ kit come in over the next few days so this is something I may consider. But as I guess we've all learned, many "upgrades" look great in theory but hardly ever yield any appreciable improvements. 

Posted : 20/08/2021 1:41 pm
bobstro
(@bobstro)
Illustrious Member
Yes, but...

I have found a shroud that provides better cooling around the back (IMO) but I'm still on the original R2 extruder & hotend design.

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 : 20/08/2021 2:33 pm
Xanthe
(@xanthe)
Trusted Member
Improved part cooling fan duct.

I have found this gives a small but quite worthwhile improvement particularly on bridging and on back side overhangs:
https://www.thingiverse.com/thing:4106196

I have it printed in a cellulose lactide or PLA/PHB material.  In my case Extrudr Greentec Pro Carbon, but normal Extrudr Greentec Pro or Fillamentum NonOilen will work just as well; both have a HDT >=110°C

Posted : 22/08/2021 6:36 pm
Brad
 Brad
(@brad-2)
Trusted Member
I also tried the Improved Part Cooling Fan Duct

I did print and switch to the above mentioned improved part cooling duct but switched back to the standard one after a couple of weeks. Initially after first installing it, I thought that it was better but after more detailed testing, I concluded that the results were similar to the standard fan running at about 75%. It also meant that I could not rely on the various standard Prusa Slicer profiles for different filaments so confidently. There may have been a small improvement in cooling behind the nozzle and the nozzle visibility during printing was great though.

Posted : 22/08/2021 7:09 pm
fuchsr
(@fuchsr)
Famed Member
Topic starter answered:

@xanthe

Interesting, but it looks like there's no Mk3S+/R6 compatible version of it, and no step or f3d files.

Posted : 22/08/2021 11:02 pm
cwbullet
(@cwbullet)
Member
Concur

It would be good with the designer made one.  

Posted by: @fuchsr

@xanthe

Interesting, but it looks like there's no Mk3S+/R6 compatible version of it, and no step or f3d files.

 

--------------------
Chuck H
3D Printer Review Blog

Posted : 22/08/2021 11:16 pm
Brad
 Brad
(@brad-2)
Trusted Member
RE: Fan shroud upgrade?

This is the one that I tried on my Mk3S+:

https://www.prusaprinters.org/prints/62523-delta-p-fan-duct-v2-r2-for-mk3s-extruder

Posted : 23/08/2021 10:16 am
fuchsr
(@fuchsr)
Famed Member
Topic starter answered:

@brad-2

Is the Delta P the one you were referring to in your previous post as basically delivering 75% of the original shroud? I thought you were referring to the one that @xanthe mentioned in the post before that. 

While I'm always intrigued by the ingenuity of these designs I can't help but wonder if it actually translates into consistent, repeatable performance gains -- ideally without the need to maintain separate profiles or if I don't want to switch every machine over. 

Posted : 23/08/2021 11:34 am
Xanthe
(@xanthe)
Trusted Member
Sorry...

I missed that you were using a Mk3S+.

Posted : 23/08/2021 12:46 pm
Brad
 Brad
(@brad-2)
Trusted Member

Yes I installed the Delta P fan duct and after a while concluded that the stock duct had actually provided more cooling (at least for my models) so I reverted. Let me know if you need more information about how I came to this conclusion.

Posted by: @fuchsr

@brad-2

Is the Delta P the one you were referring to in your previous post as basically delivering 75% of the original shroud? I thought you were referring to the one that @xanthe mentioned in the post before that. 

While I'm always intrigued by the ingenuity of these designs I can't help but wonder if it actually translates into consistent, repeatable performance gains -- ideally without the need to maintain separate profiles or if I don't want to switch every machine over. 

 

Posted : 23/08/2021 12:57 pm
fuchsr
(@fuchsr)
Famed Member
Topic starter answered:

Thanks guys. I think at this point I just go with the stock shroud. I have occasionally seen some issues with severe overhangs but it's not common for the models I'm printing.

Posted : 23/08/2021 1:20 pm
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