Preliminary, not recommended SV08 board cooler fan mod
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| Publication date | 2024-05-07 at 22:25 |
| Design number | 1977278 |
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To answer your question about intake/exhaust and fan placement, no you will not get nearly the cooling effectiveness of having a fan blowing directly at the hot part in any other method. Just because you're moving the same amount of air through the enclosed space doesn't mean the cooling is uniformly effective throughout that interior space. i am not specifically informed as to what the major head dumps in klipper printers are (I would imagine stepper drivers, Us [mainboard and pi mod], any rectifiers in the setup, any MOSFETs or FETs in general, etc.) but you could definitely get some of those little heatsinks that are about the same size some FETs come with (Amazon sells what they call 100 piece Raspberry Pi [normal / ive / no fan] heatsink kits that you could use to cover any random small heat sources hidden on the mainboard), and you could get fans as small as 3007 and the Raspberry Pi 4 has quite a few active heatsink designs that combine a heatsink that covers most of the board with a 30x7mm fan attached. Oh! And Geekpi has a couple different PC U air coolers "shrunk down" to be normal heatsink sized; they even have a couple heat pipes which is pretty crazy for something that small. I'm curious to see if vapor chambers ever become miniaturized with a matching price, but I doubt it when considering just how stupidly simple a heatsink is compared to a heat pipe or even crazier vapor chamber.
Assuming they're effectively controlled (SV08 is my first klipper printer, but even if the stock hard/software doesn't offer this adding it would be as simple as buying a cheap tiny PCB to plug the fans into) more fans doesn't equal more noise; in fact it means the opposite. More fans means you can run them slower, and fan speed is what really puts out the sound. So you could have a large-as-possible intake, a dedicated U cooler at least on the mainboard and maybe also the pi frankenstein's monster, and then ive MOSFET-style heatsinks on any random heat sources. That would leave you with a much quieter setup that gets the cooling efficiency of ~2+ medium sized (~70mm) fans at full bore but not directed thoughtfully if that makes sense.
Wow, thank you for all the details. Multiple smaller ones, blowing instead of sucking makes much sense. I will have to do this, because I am consistently seeing near 70°C on my host, of course being summer here. It hasn1t caused any unreliabilities, but I am sure it's not healthy for the parts.