Creality CR6 CR-6 SE Motherboard Mobo Cover for 92mm Fan (25mm or 14mm)

thingiverse

See my make for more and better photos. I didn't like the idea of having to have my motherboard fan on full power all the time - but the stock one was tiny and noisy. I discovered that Arctic Cooling make a very cheap (and quiet) 92x25mm 12V fan with temperature control. You can get it on Amazon for a fiver (make sure it's the one with TC in the name). It uses a temperature sensor on the end of a wire that you can place wherever you want and it will ramp up the cooling at 38 degrees C plus. I tested it by holding the thermistor onto the print-bed as it warmed up to 80c and I could see the fan getting faster and faster - but it was still really quiet. Even at the lowest (and quietest) default speed it puts out a good amount of air and as it blows directly onto most of the components now it should be more than enough to cool the motherboard. I put the thermistor inside one of the extruder heatsinks so that as that warms, the fan will blow harder (I've got no idea which one I put it on or which gets hottest so if anyone has any advice as to the hottest part of the board - please let me know. The good thing about this design is that you can mount the fan at any distance from the motherboard - the highest point is the green terminals you connect the heaters to once you move some of the wires to the side and I measured that the fan needed to be 3.58mm from the outside of the cover - so I used the 3mm spacer - but I've included lots of different sizes you can use - and you can adjust their size in the slicer too. You can use the fan mounts inside or outside of the case so there is no limit to the fan size or it's placement. You need quite a lot of fan screws - but if like me you've owned several PCs, you probably have lots lying around or you can buy some cheaply. I found that ones with more threads were a bit more gentle on the plastic and I would definitely advise pre-threading all the holes before trying to mount the fan! The original design was quite thin so I beefed up the chamfers on the side piece (which isn't really needed anyway to be honest. I also found that the mounting holes didn't line up and had to move them. Mounting the fan actually makes the whole thing stronger - but be careful when removing it from the bed or doing cleanup! I added an extra hole that you can use along with the thing to mount it to the rail in two positions instead of just one. using this T-nut adapter thing. https://www.thingiverse.com/thing:3050607 - I used bluetack to hold the nut in place before I bolted it in place - you need to make sure the M3 bolt isn't too long or it hits the rail underneath the nut. YOU MUST USE WASHERS ON THESE TWO BOLTS! Otherwise it will rip through the plastic of the case! I remixed a buck converter holder here https://www.thingiverse.com/thing:4704985 so it fits on the rail out of the way to provide the fan with 12 volts from the stock 24 - make sure you use a multimeter and adjust the screw to output 12 volts before you connect the fan! I had a connector that matched the stock fan - but you can either cut the stock one off and solder it on or buy some - take careful note of the positive and negative wires - they are opposite to the power supply fan connector. The black wire goes to the black on the fan and the red to the yellow on the fan - the green/blue wire on the fan isn't needed and can be cut off. The motherboard case can be slid out of the way to get it on if you remove a screw holding it that's underneath the bed (it's fiddly). Note the Kapton tape to stop it shorting on the extrusion it's end is pressed against.