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Olep
 Olep
(@olep)
Active Member
Improved fan shroud / nozzle

Hi.

Because some issues with some prints due to only cooling from one side I went to thingiverse on the search for a fan shroud that blows from both sides.

I found this fan shroud on Thingiverse made for the MK2S. https://www.thingiverse.com/make:363410

It blows air from both directions giving more equal cooling conditions on all sides of printed parts.

Have an look at the example video given here:

This shows an circle with high overhang, half of the circle printed fine on stock, while the other half was full of artifacts. With the modified fan shroud it printed fine, also showing an 3dbenchy, and I couldnt find any setbacks there.

I would really incourage the Prusa team to test this out, and maybe make it the new stock fan shroud.

Posted : 24/07/2017 10:35 am
tobias.k3
(@tobias-k3)
Trusted Member
Re: Improved fan shroud / nozzle

I am thinking a lot about such a kind of fan nozzle which covers 180° / two sides as my benchys tend to have bad overhangs on the backside.

Any other experiences with such noozles?

----------------------------------------------
PRUSA MK2
- Noctua fan 40mm
- MK2/MK3 hybrid extruder

Posted : 24/07/2017 8:38 pm
Olep
 Olep
(@olep)
Active Member
Topic starter answered:
Re: Improved fan shroud / nozzle

Done some more prints and its still performing well. I also know others who have printed it and like it.

I suggest you print your own and test it out.

Posted : 26/07/2017 2:54 pm
Mark Fortune
(@mark-fortune)
Active Member
Re: Improved fan shroud / nozzle

I have printed one of these, and can definitely say that it really does improve bridging and overall print quality!

Original Prusa i3 MK2S

Posted : 31/08/2017 10:50 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Improved fan shroud / nozzle

I too use this on both my printers, but I removed the baffles from the inside and added a small vent at the front. Also raised the left hand side and allowed the fan to sit in deeper. Also moved the internal air splitter to the left to give a more equal air flow.

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…

Posted : 31/08/2017 11:04 pm
Mark Fortune
(@mark-fortune)
Active Member
Re: Improved fan shroud / nozzle


I too use this on both my printers, but I removed the baffles from the inside and added a small vent at the front. Also raised the left hand side and allowed the fan to sit in deeper. Also moved the internal air splitter to the left to give a more equal air flow.

Peter

I'd love to give your custom tailored version a try, have a link to the model?

Original Prusa i3 MK2S

Posted : 01/09/2017 1:05 am
Jad308
(@jad308)
New Member
Re: Improved fan shroud / nozzle


I too use this on both my printers, but I removed the baffles from the inside and added a small vent at the front. Also raised the left hand side and allowed the fan to sit in deeper. Also moved the internal air splitter to the left to give a more equal air flow.

Peter

I'd be interested in trying your remixed version as well if you're happy to share. Cheers.

Posted : 01/09/2017 2:10 am
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Improved fan shroud / nozzle

Unfortunately, I cleaned out my PC a couple of weeks ago and deleted my model.

So I have to re-work it. And I don't have too much free time at the moment. It's on my "To-Do" list...

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…

Posted : 01/09/2017 9:52 am
LaPointe
(@lapointe)
French moderator and translator Moderator
Re: Improved fan shroud / nozzle

I'm currently using this one with pretty good results: https://www.thingiverse.com/thing:2471337

Posted : 01/09/2017 11:45 am
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Improved fan shroud / nozzle


I'm currently using this one with pretty good results: https://www.thingiverse.com/thing:2471337

Yeah, pretty similar.

I did find my model, so here it is. Needs a little cleanup after printing.

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…

Posted : 01/09/2017 1:19 pm
Jad308
(@jad308)
New Member
Re: Improved fan shroud / nozzle

Thanks for the file Peter. I'll print it and give it a go. Cheers.

Posted : 01/09/2017 2:18 pm
Mark Fortune
(@mark-fortune)
Active Member
Re: Improved fan shroud / nozzle



I'm currently using this one with pretty good results: https://www.thingiverse.com/thing:2471337

Yeah, pretty similar.

I did find my model, so here it is. Needs a little cleanup after printing.

Peter

This looks awesome! I'll try it in PLA, thanks for the share!

Original Prusa i3 MK2S

Posted : 01/09/2017 5:19 pm
LaPointe
(@lapointe)
French moderator and translator Moderator
Re: Improved fan shroud / nozzle

PLA is not a good idea for a part which is so close to the nozzle!
You should use at least PETG or any PC. I've used Colorfabb Ngen for mine.
ABS is also an option, but I don't like this material.

Posted : 01/09/2017 6:14 pm
Mark Fortune
(@mark-fortune)
Active Member
Re: Improved fan shroud / nozzle


PLA is not a good idea for a part which is so close to the nozzle!
You should use at least PETG or any PC. I've used Colorfabb Ngen for mine.
ABS is also an option, but I don't like this material.

I printed my last two fan shrouds out of ABS. Apparently Peter has printed his in PLA. So I'm gonna try it his way.

Original Prusa i3 MK2S

Posted : 01/09/2017 9:05 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Improved fan shroud / nozzle


I printed my last two fan shrouds out of ABS. Apparently Peter has printed his in PLA. So I'm gonna try it his way.

PLA all the way for me. No problems. Not even when the fan isn't working.

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…

Posted : 01/09/2017 11:11 pm
Mark Fortune
(@mark-fortune)
Active Member
Re: Improved fan shroud / nozzle



I printed my last two fan shrouds out of ABS. Apparently Peter has printed his in PLA. So I'm gonna try it his way.

PLA all the way for me. No problems. Not even when the fan isn't working.

Peter

So I just printed one of these, and it actually doesn't work on my MK2S as a result of the PINDA probe. I'd edit your model, but I'm extremely bad at modeling haha. It looks like this thing ( https://www.thingiverse.com/thing:2276997 ) has been edited to fit the new PINDA mount. Time to attempt to fix yours 😀

EDIT: Tried, failed miserably. If anyone has free time and can actually utilize modeling software well, I would be super appreciative if you could edit this! Ty!

Original Prusa i3 MK2S

Posted : 03/09/2017 12:30 am
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Improved fan shroud / nozzle


So I just printed one of these, and it actually doesn't work on my MK2S as a result of the PINDA probe. I'd edit your model, but I'm extremely bad at modeling haha. It looks like this thing ( https://www.thingiverse.com/thing:2276997 ) has been edited to fit the new PINDA mount. Time to attempt to fix yours 😀

EDIT: Tried, failed miserably. If anyone has free time and can actually utilize modeling software well, I would be super appreciative if you could edit this! Ty!

Ah sorry, I have the original probe holder on both my printers and this design fits very well.

How much needs to be taken off the model to accommodate the probe?

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…

Posted : 03/09/2017 10:52 am
Mark Fortune
(@mark-fortune)
Active Member
Re: Improved fan shroud / nozzle



So I just printed one of these, and it actually doesn't work on my MK2S as a result of the PINDA probe. I'd edit your model, but I'm extremely bad at modeling haha. It looks like this thing ( https://www.thingiverse.com/thing:2276997 ) has been edited to fit the new PINDA mount. Time to attempt to fix yours 😀

EDIT: Tried, failed miserably. If anyone has free time and can actually utilize modeling software well, I would be super appreciative if you could edit this! Ty!

Ah sorry, I have the original probe holder on both my printers and this design fits very well.

How much needs to be taken off the model to accommodate the probe?

Peter

Hey!
Not too much needs to be taken off. I actually tried loading the model from https://www.thingiverse.com/thing:2276997 and your model into tinkercad, they are the same dimensions, the other model just has a cut-out to accomodate the pinda probe. I was going to try to use the thingiverse model as a reference point to make the cut-out. I can try to take measurements with my calipers if you'd like once I get home!
-Mark

Original Prusa i3 MK2S

Posted : 03/09/2017 2:44 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Improved fan shroud / nozzle

Try this.

Don't know if I have taken enough off, and it is very rough...

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…

Posted : 03/09/2017 4:13 pm
spark
(@spark)
Reputable Member
Re: Improved fan shroud / nozzle

Would this be a good forum thread to ask for input on a 40mm flow fan conversion of the stock pressure blower fan? I'm not happy with the noise and lack of space for modding and was extremely happy with my 40mm upgrade to break fan.

MK2S kit owner since 8/15/2017

Posted : 04/09/2017 4:13 am
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