Fan shroud upgrade

[Neotko]

If you print them as one should indeed add stability but also since the print lines go in horizontal direction the upper part will be weaker than if print flat. Tensile strength... But ofc it shouldn't matter. I made a lot of print test while doing my eyeglasses and I'm kinda maniac about the strength of the print parts when changing the angle.

[LePaul]

Will the nGen like being that close to the heater block?

[Neotko]

No idea, I just got a ngen sample on today colorfabb order. I was planning to write/test exactly that but I'll test it with my um2 fancap since I don't plan to touch my umo+ anymore since they are just printing perfect atm.

I can say that PLA with aluminium tape even the area near the hotend had zero deformations, but the area without tape started to curve from the bed heat. So... Aluminium tape for me will be just a standard. Also it sticks muuuuch better to carbon (like a bit too well).

[Amedee]

The nGen has an higher Tg than the XT, so if I am in trouble with it, you will be as well

[Neotko]

The nGen has an higher Tg than the XT, so if I am in trouble with it, you will be as well

No no, I mean...

When you print stuff horizontal or vertical, the parts has more strength in one direction than the other. I just mean that it's easier to break something between the layers than across them.

[Amedee]

Got that -- was answering LePaul

[Neotko]

Btw amedee, I will try to renew the 40x40 fancap quite soon. The lastest design done for um2 hotend moves the air beautifull

This design, it's almost finish, but I need to ngen printtest the final design

https://ultimaker.com/en/community/2099 ... -s-01-190c

After doing that I'll update the umo+ design, but it's a bit harder to match since the um2 hotend has the advantage of more distance from the nozzle to the heater block (a good 3-4mm that allows a better fancap design) to match this on umo I don't know if it's posible. But, the inner fancap design will help to focus the air even more while creating a good surrounding air to keep the print cool.

[LePaul]

Well when you can't source Metric drill bits locally...this might help in a pinch

[Amedee]

I reprinted the fan holder adding 1mm gap for the 'sandwich' part, I find it better that way.
At the same time I started playing with the new Cura

The design (I like renderings...):

Fan support remix

The print:

[LePaul]

I have a question with the fan left and right pieces....there isn't a top view, I am wondering if I have them mixed up.

I have drill and tapped the holes. Just want to make sure I place what is "left" on the left side, etc. Using Cura to visually explain!

Is this the correct orientation? Or do I have them reversed?

[LePaul]

I'm curious about the fans you guys are using. I was testing mine and they move a LOT of air...I wonder if too much?

Here's the specs...

[LePaul]

Amedee, tonight I was carefully drilling the holes out of the "fancap top" left and right and the tabs broke off on each

XTCF-20 just isn't good for those sorts of loops! I need to either print them again or find a way to wire up and use temp shroud to print in PLA/nGen/something that works!

[Neotko]

I don't think it's a filament problem but just a bad print. I have drill 6 of that parts and they can hold a lof of force, never broke one. If the other parts have that bad layer bonding you might have problems with them...

[Amedee]

@LePaul

- Re the position, yes it is correct -- the idea is to bring the fans forward to get them centered around the nozzle.

- Re the fan speed, I don't think somebody really knows the specs of the original one, but it is blowing pretty hard... Two of them might be a lot. I went to 24V fans, it looks to me more reasonable in a dual fan setup even on the UMO. Of course you don't have to use yours at 100%

- For the parts, if it breaks so easily there is something basically wrong, XT-CF is supposed to be strong. Also afaik these ones are 3.2mm, so they should fit without drilling. In my print I just go manually with a 3mm drill bit to deburr (but there wasn't really something to deburr)

[LePaul]

Thanks for the tips on alignment of the parts.

Well, I can try the print again and just go very slow and steady. XF-CF may be strong but it really, really struggles with any over hang/minor bridge.

Fans...I was looking at the airflow CFM. It does push through a lot of air, so perhaps this is exactly what is needed! Or...my Ultimaker will hover