Snapmaker U1 Improved Power Supply and Motherboard Cooling

This is my first Model for the 3D Printing community as it's been take take take for me, for years !!!
So this is my attempt to give something back.
You're Welcome !!!

OBJECTIVE

The intent was to silence the power supply Fan and cool the stepper driver chips which show up in Orca around 87 degrees C. Although they are rated to approximately 110 degrees C, they are still getting too hot for my liking. In addition, I decided to extend the cooling to the whole of the motherboard.

The outcome is a much quieter PSU fan and a cool Motherboard with stepper driver chips running at 58c as opposed to 87c. As the air from both fans is directed down and out through the bottom of the printer, the required chamber temperature can be maintained.

I've run this on both long and short prints and it's good to go.

HARDWARE

My previous experience in terms of whisper quiet Fans has been the Noctua range. The issue is that these fans are 12v onlyfans! so I have had to include a step down DC to DC voltage converter.

Soldering is required.  However; I had some Mini Fast Wiring Cable Connectors and so used those to speed up the job.

Here is the list of required hardware and related links.

   1.   Noctua NF-A9x14 PWM, Premium Quiet Fan, 4-Pin (92x14mm, Brown) (Required Qty : 2)

   2.   24V to 12V DC step-down converter (Required Qty : 1)

   3.   Mini Fast Wiring Cable Connectors (M2-1) one to one (Required Qty : 2)

   4.   Mini Fast Wiring Cable Connectors (M-F12) two to one (Required Qty : 2)

   5.   PVC Insulated 2 Pin Electrical Wires (Required Qty : 1 Metre)

WIRING

Always ensure that electrical equipment being worked on is switched off and unplugged. Before proceeding with the wiring. Position your fans where you need them and measure how long the wires need to be.

The power for both of the fans we will be installing; comes from the original PSU (Power Supply Unit) fan, which consumes 0.20a of power, whilst the Noctua fans each consume 0.11a of power, so the two fans are fine living off the one power supply point.

The wiring is quite basic.
Snip the original PSU fan cable (black and red). Locate the DC to DC stepdown converter as we have 24v coming out of the PSU fan cable and we need to convert it to 12v.
The PSU black cable should go to the  DC to DC stepdown input minus (-) cable, and the PSU red cable should go to the DC to DC stepdown input (+) cable. Us the Mini Fast Wiring M2-1 connectors.
From here we will be working with the two output cables of the DC to DC stepdown converter which will now be providing 12v.

Connect the single side of the Mini Fast Wiring M-F12 connectors to the output cables of the DC to DC stepdown converter, with which you now have two connection points per cable.
The Noctua fans have a four wire configuration. We will be only using the yellow and the black wires.
The black fan wire is GND, so connect to the minus (-) wire of the DC to DC stepdown converter (Black). The yellow fan wire wants +12v so connect it to the plus (+) wire of the DC to DC stepdown converter (Yellow).

THE PANELS

I've designed the Panels to be a tight fit, as there is not much room to play with.
Once you have printed the panels in PETG or better, the fans will press fit into the panels.
It's a tight fit, but it's a good fit. I had to hammer them on with a plastic hammer. Be careful not to break them. The Power supply panel is an easy fit. Unscrew the original and screw in the replacement.
The motherboard panel is more difficult. You will have to have unclip the RFID antenna cables (x2). Please be careful handling everything. Before you put the Motherboard panel on, place the outer panel (with the antenna on it) inline with the Snapmaker front, this will minimize the distance between the antenna cable and the motherboard. Next; Thread the two antenna cables through the small hole in the motherboard panel and plug them in carefully. The panel has a loop at the top. Position the panel over the top of the motherboard ensuring that no cables are squashed but instead are placed inside the cut aways.
Make sure the panel is fully positioned then attempt to place the loop at the top onto the existing screw protrusion.  This is done by pressing down gently on the top of the loop until it is inline with the protrusion, then press it on gently.

You'll probably need to rotate one of the antenna to give you more cable as I did (see pictures).

Fitting the outer Snapmaker panel involves placing it in place and clicking all the fittings. The bottom will not be in. Press the bottom of the panel at the bottom pushing it up until it clicks in. You will have to do this for all 4 fittings at the bottom.

PRINTING THE PARTS

I've printed it all in PETG in case there are any heat issues. I would not recommend PLA.
There are three colours in total, Red, Black and White. Choose your own if you so wish.
Supports on Motherboard and Power Supply Panels are in the project file.

Enjoy.