Fan shrouds melting too often  

RE: Fan shrouds melting too often

@hellbender-2

- https://www.prusa3d.de/downloads/others/MK3_MK3StoMK3S+_STL.zip

- SPINDA

- Bearing Clips Y-axis

- hotend PTFE

or

Prusa offers an upgrade kit: https://shop.prusa3d.com/en/original-prusa-i3-mk3s/1390-original-prusa-i3-mk3-to-mk3s-upgrade-kit.html

RE: Fan shrouds melting too often

All and all, the upgrade kit is not a bad priced upgrade.

RE: Fan shrouds melting too often

@cwbullet

Not at all, I just finished the upgrades and although the printer was working fine, it appears to be better. 

1. I did the extruder upgrade right after the files were available. Better cooling and the better fan shroud. 
2. Although not required I did the x-axis upgrade, belt tension adjustment easier. 
3. The best part is the y-axis upgrade, after adding the clips are the rod holders. My skew is now 0.03, well within tolerance. 

Now, I'm in the process of completing the calibration routines, but it looks great! 

RE: Fan shrouds melting too often

@pcweber

Good to hear.  I might slowly upgrade mine.  I have one kit and another on the way.  

RE: Fan shrouds melting too often

@cwbullet

I think so too, if you add up the effort and the material.

RE: Fan shrouds melting too often

@karl-herbert

There could've been a set of mitsumi bearings to replace the ones that have been rolling along for a year. I simply cleaned the bearings in a zip lock bag of IPA, then regressed them.

The machine is quieter so I suppose they needed regreasing. 

RE: Fan shrouds melting too often

@cwbullet

I checked with Extrudr. Unfortunately, there is no distributor in the US at this time, but they would offer a 30% discount for shipping to the US.

original message:

Hallo Karl,

danke der Nachfrage und vielen Dank für die Empfehlungen.
Nein, im Moment liefern wir nur als OEM (white Label) nach USA.
Was natürlich möglich ist, eine Bestellung über www.extrudr.com.

Gerne können wir dir 30% Rabatt auf die Produkte anbieten. Der Versand in die USA kostet aber schnell mal einiges. 35-160€ für ein 30kg Paket.
Durch denn Rabatt wiegt es sich dann aber sehr gut auf. 🙂

Falls du Interesse hast, einfach per Mail melden.

Grüße

Mit freundlichen Grüßen,

extrudr

e: [email protected]

p: +43 660 88 10 615

w: extrudr.com

RE: Fan shrouds melting too often

Thanks.

RE: Fan shrouds melting too often

It's been awhile, thought I post an update.

I've been using the following Fan Shroud with success:

https://www.thingiverse.com/thing:4106196

Printed it in PETG and now also use a sock

Haven't had any issues since 🙂

RE: Fan shrouds melting too often

@martijn

I tried this shroud and it worked well for me too.  

RE: Fan shrouds melting too often

I know I'm a bit late to the discussion, but after reading this thread I thought I'd share the duct I've been using. I printed the first one with PETG and it held up great through 100+ hours of printing (PLA/PETG), has a little extra clearance from the heater block and a support arm so both sides are properly supported. The only downside I've found is that it's a bit bulky compared to stock which makes it a little harder to see the nozzle when close to the bed.

Printing a new one in Polymaker PC-Max now:

https://www.prusaprinters.org/prints/39679-prusa-mk3s-and-mk3s-fan-duct-with-pinda-support

Hope that helps someone, and kudos @kalleknall for the remix!

RE: Fan shrouds melting too often

I've been using Extrudr GreenTec Pro for my fan shrouds since more than a year and never had any temperature problems with it.

RE:

I used Polymaker CoPA ( https://eu.polymaker.com/product/polymide-copa/) = PA6 / PA6.6 blend.

This stuff has the Vicat softening temperature ( https://en.wikipedia.org/wiki/Vicat_softening_point) at  180°C, I highly recommend this for the fan shroud.

For comparison: Vicat softening temperatures:

• PLA 63°C
• PETG 84°C
• ABS 104°C
• PC 130°C