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Printer Guide| CR-10 V2 Dual-Port Cooling Fans, are Two Truly Better than One?


The so-called dual-port cooling fans on CR-10 V2 are confirmed to improve heat dissipation by 55%, resulting in 10% higher overall printing precision. In this article, we will probe inside the fans to help you understand the purpose of this specially designed device.


Where are they?
Before we get into the dual-port cooling fans, it is also important to know the key factors influencing the quality of 3D prints. Any errors on layer thickness, material quality, printing temperature could possibly ruin a preconceived good 3D print. Among the three factors, the printing temperature actually involves several aspects including hot-end temperature, hotbed temperature, and model temperature. The CR-10 V2 dual-port cooling fans are installed near the hot-end to dissipate heat as quickly as possible for this crucial component, avoiding overheating and filament overflow or blockage.

The fan at the front of the extruding unit is a constant axial fan
, and the other on the side of the extruding unit is a controllable blower fan. Check the detail pictures as shown below.


CR-10 V2 constant axial fan
CR-10 V2 controllable blower fan
 
What are they for?
In an FDM 3D printer, hot-end is an essential part responsible for heating and depositing the plastic onto the print bed, which requires enough heat to melt the filament, and stay cool enough near the top ensuring gears to push filament through. In this way, the rest parts of the hot-end should stay cool except the nozzle and heat block, existing significant cooling problems.

Most hot-end has a metal tube inside, connecting the heat block and the heatsink, to help dissipate heat at maximum. This is quite helpful for eliminating heat creep problems, reducing the risk of extruder clogs and inconsistent extrusion. Therefore, the constant axial fan is such a good idea to accelerate heat dissipation that the machine improves the print success ration.
 

Different from the constant axial fan, the blower fan on the side of the extruding unit is controllable, which means users can use it depending on personal requirements. Anyway, is it a necessity?

It is known to all that the 3D prints are actually a final outcome of continuous depositing Melton plastic. To get a good final print, each layer can be well deposited only when its previous layer is cooled and solidified. A controllable blower fan is, therefore, a good assistant on this occasion for cooling freshly-extruded plastic as soon as it exits the nozzle. This eliminates ripples and other print problems, producing fine texture final prints.

In most cases, a controllable cooling fan is highly recommended. If you are using specific material like ABS, or TPU, this little handy device might become a troublemaker for it will destroy the shape of the 3D model. Remember to disable or lower it when using these materials.
 
Are they truly making a difference?
To well demonstrate the effect of cooling fans, let’s have a glimpse at a group of experimental data. YouTuber Rorlin 3D NerdStop conducted a contrast experiment with one cooling fan and two cooling fans.

Rorlin had 4 final prints in total, the first one printed with one cooling fan, the second one printed with two cooling fans, the third one printed two cooling fans at 50% fan power, the fourth one printed with two cooling fans and different Cura settings at 100% fan power.

The first and second prints settings
The cura settings of the first and second prints
The first print with one cooling fan
The second print with two cooling fans

The first print is easily noticed with some overheating problems, rough print surface and messed-up layers. When it prints the second print with two cooling at 100% fan power, the print quality is much better than the first one.

The third prints with two fans at 50% fan power

The cura settings of the third print
The third prints with two fans at 50% fan power
 
Though it is not as good as the second one, it is much better than the first printed with a single fan. At this point, we could possibly say that two cooling fans truly do a good job.
 
The fourth print with different settings and two fans at 100% fan power
The cura setting of the fourth print
The fourth print with two fans at 100% fan power
 
Two cooling fans release its full potential to deliver a gorgeous final print with a smooth surface and exacting details. There isn’t any wobbling and rippling on it. For PLA, two cooling fans are definitely better than one.
 
Benefits of Two Cooling Fans
Accelerate hot-end cooling and prints solidifying
Avoiding print problems like filament overflow and nozzle blockage
Better print quality with a smoother surface
Higher print success ration
Safer print experience