Laurent, cooling is for sure better than the failing fan.
About heat it's hard if not impossible to account fan effectiveness. Motor is adding heat to the big black block and heated bed also adds heat to it. The fan is recirculating already heated air.
The best test is to measure air temp around the fan and hotend aluminum cooler plate. If difference is small then fan is effective.
The thermal connection between the heat sink and the feed tube also seems pretty minimal to me - there is not much metal-to-metal surface contact area. I put thermal grease around this joint in the hope that it might help.
Hello, can You please write something about installing a noctua fan. Does it have the compatible connector or is it necessary to cut the cables? if so which one goes where?
Noctua fans have inside the package the necessary adapter to connect directly. It will work right out of the box but the cable will be a little longer than needed.
There are options though.
More elegant is cable splicing and soldering or mounting a compatible connector to the fan's cables.
The other solution is represented by the cable connectors inside the box. Cut cables put reds and blacks into two automatic cable ties and turn. Voila, they are connected and you can even do them to the correct length.
While I'm talking about those fans, did I mention that the box, packaging of the fans, and the way it's presented to the customer is really a marvel. Considering that they are not much more expensive than other fans, it's really incredible. It's pure pleasure just opening them up.
Noctua fans have inside the package the necessary adapter to connect directly. It will work right out of the box but the cable will be a little longer than needed.
There are options though.
More elegant is cable splicing and soldering or mounting a compatible connector to the fan's cables.
The other solution is represented by the cable connectors inside the box. Cut cables put reds and blacks into two automatic cable ties and turn. Voila, they are connected and you can even do them to the correct length.
While I'm talking about those fans, did I mention that the box, packaging of the fans, and the way it's presented to the customer is really a marvel. Considering that they are not much more expensive than other fans, it's really incredible. It's pure pleasure just opening them up.
Purely theoretical on my part after looking at the design of the fan. The large disk of the fan restricts airflow into the channels. I figured lifting the fan up would allow more air to travel through those channels.. It also helps insulate the fan from any heat that might be transferred from the heat sink.
About the large disk of the fan... I forgot to mention that the noctuas have the smallest diameter or to put it differently, they have the largest blades when comparing 40mm fans.
This is a great Idea for an upgrade, esp the power supply fan or whatever is loud. Cause having the printer near my computer is driving me crazy with how loud those fans are. Funny enough the motors are not very loud.
In case anyone is interested, the other two fans in the system are as follows:
motherboard fan: 70mm 24V fan 15mm thick
PSU fan (the one that is driving us all crazy): NMB-MAT model 2404KL-04W-B30
60mm 12V 10mm thick
80% percent of the whining comes from the insufficient air intake holes on this fan. Powering it up detached from the PSU side panel produces just very little sound. Almost completely bearable.
