Dual fan holder for Mega X Mainboard

thingiverse

I made this for my Anycubic Mega X because I wanted to use two fans to cool the stepper drivers (TMC2208). The fan ducts that people usually use are not ideal in my opinion because the small fans don't have enough pressure to push air through them efficiently. The ducts also limit airflow over the rest of the mainboard. With my fan bracket you can use two fans to cool all the stepper drivers and the mainboard also gets a bit of extra airflow. The fans will be hold in place by the printed bolts on the bracket. I used two Noiseblocker XS1 - 50x50x10 fans. <b>HowTo:</b> Probably the best way is to use low profile heatsinks like the ones that came with the standard drivers. With the low profile heatsinks you don't need any extra material to use this bracket. If you got the high profile heatsinks which usually come with TMC2208 you got a few options: 1.) Get low profile heatsinks. 2.) You have to find something to raise the normal fan mount. You can print a spacer (5 or 6mm) yourself or stack a couple of normal spacers and get a longer screw (should be something like M3x14mm) 3.) Do it like I did and get two motherboard standoff screws M3 6+6mm (6mm standoff + 6mm screw). Bend the standard fan mount so it looks a bit more like a "Z" to bring it closer to the heatsinks and further away from the bottom plate of the printer to avoid contact between the fans and the plate. It will create some vibration and maybe a whistling noise if its too close. <b>Optional:</b> To give the fans more room to breath and further reduce the risk of vibration and whistling I found two solutions. 1.) Add one or two spacers between the bottom plate and the rest of the printer. This will probably be enough to silence them completely as it separates the printer by 1-2mm from the bottom plate. 2.) This is probably an extreme variant to some people but I used more motherboard standoff screws to separate the printer even further from the bottom plate. You have to use at least 15mm standoffs. I used eight M3 15x6mm (15mm standoff, 6mm screw). You have to do this because of the beam that covers the cables that go from the left to the right.