Fan shroud upgrade

[LePaul]

Tonight's progress

[LePaul]

Using the rubber mounts that come with servo motors between the fan mount and screws. Wondering if rubber will deal with the print head heat or get a metal spacer?

[LePaul]

While I am happy with the shrouds I have made, i decided to order two Delta fans for testing.

Here's what I went with

I also pick up some additional 2-wire connectors (pre-soldered)...I couldn't find just the connector! So, I found 10 for $3. I'll have plenty of extra!

Love some feedback!

[chopmeister]

I'd recommend you get yourself a pair of 40x40x10 Sunon Maglev fans which are absolutely amazing and ditch the 50mm ones. And as a side note, buy a stack of darlington transistors if you have the old electronics, I fried mine like 5 times while testing various fan combos. Old UMO electronics are cr@p unfortunately, I was so glad once I swapped them out.

EDIT: Deltas are awesome as well, good choice

[martin-bienz]

I'd recommend you get yourself a pair of 40x40x10 Sunon Maglev fans which are absolutely amazing and ditch the 50mm ones. And as a side note, buy a stack of darlington transistors if you have the old electronics, I fried mine like 5 times while testing various fan combos. Old UMO electronics are cr@p unfortunately, I was so glad once I swapped them out.

EDIT: Deltas are awesome as well, good choice

Thanks! But are those no 40x40x20?

EDIT: Nope, they exist in 40x40x10

[chopmeister]

Yes they do, I have them on my printer. The airflow is crazy. <3

[LePaul]

I sort of went off topic and started a new thread on the fans I purchased....which seemed to have made my idea more complicated

http://3dprintingforum.us/viewtopic.php?f=7&t=164

[Neotko]

Lepaul... Did you ever try this fan cap?
https://www.youmagine.com/designs/tapir ... r#activity

The right ear robot looks pretty spot on. Ofc the "problem" it's that you might need to rotate the heater block... But I might even print it for me third umo with carbon.

[LePaul]

I did print one but think just using two fans on each side with 45 degree tilt (no ducts ) might work better

[Titus]

The tapir one looks nice, but it melts against your heater, unless you isolate it
I had some really nice fans shrouds printed from I believe Chopmeister? but my fans are to weak to actually push air through them xD So I'm using a metal sheet folded UMO+ shroud now. Which makes the machine pretty safe for children etc, but a pain in the ass to change nozzles.

[Neotko]

Indeed I think isolating the alu block it's a must to avoid two issues. a) Air on block makes constant & stable heat a issue and b) The air bouncing on bed and hitting the block also makes fluctuations on heat.

The main issue to design a umo fan I think also it's that (for good or bad) the users can install the cables on the hotend on almost 4-5 different and working ways.

Also the other issue it's that you can only go 2-3mm bellow the alu block to shoot air, because if any fan cap it's a bit too low it might hit the hotbed clamps (if tou plan to use e3d nozzles).

It's a path full of issues.

[Amedee]

So I'm using a metal sheet folded UMO+ shroud now. Which makes the machine pretty safe for children etc, but a pain in the ass to change nozzles.

I use an RC socket wrench. It is very convenient when you use the metal fan...

My old RC socket wrench...

[Neotko]

Oh guys I designed all this weekend a fan upgrade using 40x40 fans that not only it's awesome (not cute visually) but also solves all the problems.

- Doesn't hit bed clips if e3d.
- Doesn't hit sides or sideblocs.
- And most important. It's 100% simetrical.

So happy!! I'll publish it in a week. It's so awesome!

Oh forgot to edit. It useds 2x fans 24v pwm able. Not cheap. Also it needs a bit of kapton since it also blocks air from hitting the alu block. Awesome!

[LePaul]

That doesn't help my 50mm fans!

I understand the fan blowing up on the heater block thought but, doesn't any airflow bounce up? Even the new UM2+ pushes air down and will hit the block, right?

As you saw with my right side overhangs, I just need airflow for starters on that side!

[Neotko]

On UM2 you have a steel 0.5mm cap with only a small circle for the nozzle to pop out, so the air bounce it's minimal.

50mm dual fans could be installed on my mod, but would requiere some redesign. I just tested the first assembly and they rock. I need to fix a 1mm problem with the sideblock but minimal.

The problem with airbouncing it's that without a good cap, you can't shoot 100% fans to kill the overhangs at low height. But ofc that depends on what you use to print.