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Non-Pro Ender 3 MKS Gen L Adapter Case (Fixed top/bottom Screw Holes)

by LilTrublMakr Jan 2, 2019
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I printed the 40x20 version, but the hole for the top screw is significantly too far to the right.

I am guessing that you have a Ender 3 Pro. Michael's case is good for the pro version while mine is a fix for the original version. If you don't want to re print, the difference between the 2 is 8mm so you could drill a new hole.

Its a base ender 3. Non pro

The 40x20 Noctua only seems to come in a 3-pin version. What did you do to step it down to 2 pins?

Ah, I see the third pin is for rpm data, which isn't needed. Just need to wire it up properly.

This is great as I just got a MKS Gen-L for free and have an original Ender 3 (so why not use it). Currently I have 2 Noctua 2040 12v in series (one for case cooling and one for hotend). I'm curious though, what would happen if I separated them and used separate connectors? Would they die instantly from the 24v or just have shorter life spans?

typically you would see immediate smoke ;)

I would never hook up a fan that's rated for 5v or 12v into 24v, the other way around is fine tho, a 24v fan into 12v will likely run it slower, as well as a 12v fan on 5v.

Thanks for the STL and guide. Do you have any issues running the 12V Noctua at 24V? I had ordered the 5V version because it has the same airflow specs. I guess I'll just have it always on.

The connector for the case fan runs at both 12v and 24v whatever voltage is being fed to board from the power supply. In case of the Ender 3, it would be running 24v and therefore would need a buck converter to drop it down to 12v (Thanks donjakobo). I am not sure if there is any coding/setup needed to change between the two or if it just somehow knows what voltage to get it.

The 5v fan will be placed differently. If you look at this image, you will see 5v connectors on the bottom left. You can choose either the left or right side but the connector goes vertically. The top 2 pins are ground and the bottom 2 are 5v. Match the black wire with a ground and red wire with a 5v pin.

The 12/24v output on the board is not switchable IMHO, its just indicative of whatever you give it, ie if you push 24v to the board, it outputs 24v. I am not aware, nor would it make sense to have software switchable power. With a power output it would either be a jumper or similar manual mechanism. I'd personally test the power coming off if you decide to burn a Noctua fan needlessly.

Good to know, thank you!

Ok thanks, that's what I gathered. Just waiting on the stepper motor drivers to arrive.