Mars Pro 92mm Fan Upgrade

thingiverse

<h1>Silence your Mars Pro</h1> (no soldering required) Being used to classic FDM Printer noises I had high hopes when receiving my MarsP not long ago. Just to be disappointed by the unnecessary loud fan noise. Right away I tested the temperature of the heatsink and that stayed at a comfy 30-35 °C, also there clearly was enough room for a thicker and bigger fan, so there was room to improve. The original Fan, sized 80x15mm, has the Modelnumber CC8015H12S, draws about 0,25A max. at 12V and supplies a flow rate of 53m³/h while producing a noise level of 35dB(A). Therefore expecting it to fit I ordered a Noctua NF-A9 FLX. It draws 0,07A at 12V with a higher flow rate of 64,6m³/h and a noise level of only 17,1dB(A), it also comes with two low noise adapters where the "small" one would half the rpm to a similar flow rate of 51,1m³/h at 11,6dB(A). <b>What you need</b> - 4 printed fan feet - 4 screws M3x5mm (or 6mm) - (optional) 4 washers for M3 <b>Instructions</b> This is a fairly easy mod compared to its impact on usability, still you <b>can damage your printer</b>. So do this at your own risk. The printer uses 12V so the risk of electrocution is very low, but please <b>UNPLUG YOUR PRINTER</b> first! - Remove the front and back cover (make sure to unplug the Touchscreen https://www.youtube.com/watch?v=45wycTFA9E0) - Tilt the printer to the side and remove the bottom cover, you can fold it away but be careful there are still cables attached - Unplug the fan (most right, green plug on the PCB) and mark the polarity on the plug. - Remove the 4 screws from the cooling fan (keep the screws, discard the spacers) - Screw the printed feet into the heatsink with the short screws (M3x5), positioning them to face outwards - With the removed original screws mount the Noctua to the printed feet (I put washers under the screw heads to get a bit more vibration reduction). The original fan was facing AWAY from the heatsink and I kept it that way. Holes in the Feet are nominal 2,9mm so together with FDM printers tolerance it makes a great fit for the screws to self tap (I'll add another version soon for SLA/DLP or real tapped thrads). - Take the Molex to 3-Pin adapter from the noctua kit and cut off the 3-Pin Male (only 2 pins/wires are used) - Insert the two wires into the fan Plug (mind the polarity) - Connect the fan cable to this adapter Optional: You can easily install the NA-RC13 Low noise adapter in between the fan connection -> that way the printer is barely noticeable even when right beside you. <b>BUT:</b> even though the flow rate is the same with the LNA and old fan, higher temperatures reduce the lifespan of electronics and therefore I decided to use it at full speed. Still almost silent and for me, having the printer 3m behind me I can't notice that its running. <br> <H3>Happy silent printing</H3>