{"data":{"model":{"id":"451004","slug":"tronxy-crux1-silent-cpu-fan-mod","name":"TronXY Crux1 silent CPU fan mod","authorship":"author","club":false,"excludeCommercialUsage":false,"price":null,"eduProject":null,"ratingAvg":"5.0000000000","myRating":null,"ratingCount":1,"description":"

The CPU factory fan inside the TronXY crux 1 is small, so it has to run full speed 24/7, which makes the printer fairly loud, by swapping a larger fan spinning at a slower speed, it makes it significantly quieter

this mod adds about 1.5inches to the total height of the printer, so make sure it'll still fit wherever you have it set up, it also requires some soldering, and opening and modifying your printer, do this at your own risk.

you'll need:

a 12v 80mm fan (old pc fan)
a fan grill (not required but recommended, one can be 3D printed)
a way to convert 24v to around 5-8v (I used a cheap buck converter off amazon)
4 of the 3D printed taller feet I included as a model (recommend printing with TPU)
pliers
a soldering iron (to attach wires to the buck converter)
Allen key/screwdriver to open the printer

(a multimeter and bench power supply aren't required, but can help with adjusting the buck converter and testing the fan so you don't have to power on the printer while its open)

Step 1: print 4 of the taller feet for the printer, id recommend TPU, but other plastics will work, they may just create additional vibration, you can probably use felt or rubber pads on the bottom.

Step 2: disconnect the printer from power, and lay it on its back, open the printer using the screws on the bottom, and unscrew and unplug the 60mm fan, its only held in with one screw in the corner,

Step 3: take the bottom plate of the printer and remove 12 of the bars from the vent, as shown in pictures, be careful of sharp edges

Step 4: cut the connector off of the 60mm fan, and solder it to the input of the buck converter, then take the wires from the 80mm fan, and connect them to the output of the buck converter, pay attention to polarity

Step 5: adjust the buck converter to take the 24v from the fan connector inside the printer, and bring it down to around 4-8v, or until the fan is quiet, but still moving air. (adjust it before connecting it to 24v, because the fan is only rated for 12v) I wrapped the buck converter in tape to keep it from shorting against anything inside the printer.

Step 6: using standard pc fan screws, attach the fan to the baseplate, the spacing of the grill is nearly perfect to hold the fan with screws, but some pliers may be needed to adjust it, make sure the fan is on the same side as the feet of the printer, pay attention to air-flow so that it goes into the printer (see pictures). id also recommend using some kind of fan grill to keep fingers and print scraps from touching the fan, you can print one if you don't have one, just keep in mind some fan grills create additional noise (especially ones with small holes, or that sit close to the fan)

Step 7: double check all the wiring, connect the fan and route the wires, make sure nothing is touching the blades of the fan, and re-attach the base of the printer with the screws, again, making sure nothing touched the fan blades, and no wires are pinched (see pictures).

Step 8: unscrew the 4 small feet from the printer, and attach the new taller ones using the original screws, to make room for the fan on the bottom. (see pictures)

Step 9: Triple check all the wiring, then plug in the printer, and make sure the fan works correctly, remember it only powers one once the printer starts to preheat, not as soon as you turn on the printer so don't worry it it doesn't work at first, the printer should now be significantly quieter, and have better airflow then before.

leave a comment or message me for any questions, I'm fairly active on this site so ill respond pretty quickly

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