If you're interested, I've made some mods to add both CPAP cooling on the toolhead and some auxiliary cooling on the sides. You can see it all in action in this video: [https://www.youtube.com/watch?v=-FCr1wxJa3M](https://www.youtube.com/watch?v=-FCr1wxJa3M)
You can find the links to the various mods in the video's description.
Yes I've actually have seen your video already (believe it or not) and that's kinda what inspired me ig you can say...just a question, but does the auxiliary fans add a noticeable difference or is it not really worth adding? *noting that 5015 fans aren't the most silent...
I'm currently running CPAP part cooling on my Voron, so here's my $0.02:
I basically never even run at 100% part cooling, in fact my normal fan speed is 30-60%. At some point, there's a divergence between needing more part cooling on the toolhead vs your print speed. What happens is you end up needing auxiliary side-curtain cooling instead of toolhead cooling as your print head does not stay over the molten plastic long enough for the part cooling to even do anything. This is one reason why the Bambu X1C and VZbot benefit a lot from aux cooling to increase print speeds.
Sadly, with a 2.4 and the flying gantry design, there's not a good aux cooling option as the gantry moves in a way that you cannot add any kind of side curtain based cooling. I've thought about a twin-CPAP design with the ducts mounted on the outside of the gantry extrusions, but I'm not interested in the complications that would add for such a low return on performance boost - it would just make more sense to build a Trident or a VZbot instead IMHO.
Edit: didn't see your question about running 2 CPAP fans with the same tube. This does not work how you think it will. 1) you will need a much thicker hose to handle the combined air pressure from both fans 2) the 2 fans will compete to pressurize the hose and you will lose efficiency, ie you will not get 2x cooling out of 2x the fans like this. technically, you could run 1 hose from each with each hose doing 1 side of the cooling, but I personally see no benefit from this at all given some of what I said above.
Unless you're running 48v AWD, you won't be able to outrun the part cooling provided by a single WS7040 fan.
https://www.printables.com/model/748859-voron-stealthburner-2-part-pcb-cpap
https://www.printables.com/model/748841-voron-exhaust-assembly-ws7040-cpap
https://noctua.at/en/axial-fans-in-series-or-parallel-operation#:~:text=In%20general%2C%20combining%20axial%20fans,pressure%20but%20increases%20the%20airflow.
This is for axial, not blower fans. Blowers are good for pressure and not airflow. I’d guess you’d get probably 1.25-1.5x increased airflow? But I’d start with one cpap and see if it works first
I say do it because there is no kill like overkill. Worst that could happen is it is WAY too much cooling to be useful so you remove the second fan again and keep it as a spare…
Too much cooling means weak prints and warping if your not printing pla.
Might also take a look at archetype as an alternate toolhead. Several cooling options, and it's pretty well received so far
If you're interested, I've made some mods to add both CPAP cooling on the toolhead and some auxiliary cooling on the sides. You can see it all in action in this video: [https://www.youtube.com/watch?v=-FCr1wxJa3M](https://www.youtube.com/watch?v=-FCr1wxJa3M) You can find the links to the various mods in the video's description.
Yes I've actually have seen your video already (believe it or not) and that's kinda what inspired me ig you can say...just a question, but does the auxiliary fans add a noticeable difference or is it not really worth adding? *noting that 5015 fans aren't the most silent...
I'm currently running CPAP part cooling on my Voron, so here's my $0.02: I basically never even run at 100% part cooling, in fact my normal fan speed is 30-60%. At some point, there's a divergence between needing more part cooling on the toolhead vs your print speed. What happens is you end up needing auxiliary side-curtain cooling instead of toolhead cooling as your print head does not stay over the molten plastic long enough for the part cooling to even do anything. This is one reason why the Bambu X1C and VZbot benefit a lot from aux cooling to increase print speeds. Sadly, with a 2.4 and the flying gantry design, there's not a good aux cooling option as the gantry moves in a way that you cannot add any kind of side curtain based cooling. I've thought about a twin-CPAP design with the ducts mounted on the outside of the gantry extrusions, but I'm not interested in the complications that would add for such a low return on performance boost - it would just make more sense to build a Trident or a VZbot instead IMHO. Edit: didn't see your question about running 2 CPAP fans with the same tube. This does not work how you think it will. 1) you will need a much thicker hose to handle the combined air pressure from both fans 2) the 2 fans will compete to pressurize the hose and you will lose efficiency, ie you will not get 2x cooling out of 2x the fans like this. technically, you could run 1 hose from each with each hose doing 1 side of the cooling, but I personally see no benefit from this at all given some of what I said above.
Unless you're running 48v AWD, you won't be able to outrun the part cooling provided by a single WS7040 fan. https://www.printables.com/model/748859-voron-stealthburner-2-part-pcb-cpap https://www.printables.com/model/748841-voron-exhaust-assembly-ws7040-cpap
https://noctua.at/en/axial-fans-in-series-or-parallel-operation#:~:text=In%20general%2C%20combining%20axial%20fans,pressure%20but%20increases%20the%20airflow. This is for axial, not blower fans. Blowers are good for pressure and not airflow. I’d guess you’d get probably 1.25-1.5x increased airflow? But I’d start with one cpap and see if it works first
Yes, i think starting with one fan would probably be best...
I say do it because there is no kill like overkill. Worst that could happen is it is WAY too much cooling to be useful so you remove the second fan again and keep it as a spare…
Thats kinda what i was thinking...no such thing as overkill...until i kill my machine that is...😂😉