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Is possible to integrate a function that is trigger from cpu temp to control a fan connected to ramps or gpio? Use a thermal switch is simple but with this solution is more flexible.
Another idea is the possibility to update ramps througs web interface without making external scripts or ssh averdude commands.
Gerry
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If you could modify RAMPS firmware, it looks much more flexible.
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mmm, is possible to modify the hotend temp for fan trigger, but is necessary to solder on the pins of mcu a ntc and pullup resitor, some boards haven't circuity onboard. Actually i activate fan on bootup with low duty, set duty high when printing, and re-set low with stop. If i activate fan only when printing the cpu temperature is high when slicing.
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Maybe this can help you:
https://www.nanodlp.com/forum/viewtopic.php?id=1526
I have this setup. It is very nice and also not noisy unless you put your ear very close. Normal fans make more noise than this set up.
Cooling also works nice.
Without the fans my Pi would throttle the CPU from overheating. Now with the fans I have never seen throttling, only (auto) overclocking and temps 50-60C with room temp 25C or lower.
I even see now they have metal cases with the fans inside. This will impact the temps even greater. I only have the simple dual fan setup.
Here metal case with fans:
https://www.ebay.com/itm/Aluminum-Metal … 3230587058
Last edited by Sint (2020-04-29 10:50:28)
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Thanks for the experience condivision. I think that the fans on this heatsink are 12v powered to 5 because it is notorius noisly.
I have a wanhao d7 plus that already have another board, a nanopi m1, i have installed on it the nanodlp linux arm version but unfotrunately the printer already have 3 fan that are immense noisly. One of this are directed on the board. I'm plan to thermoregulate the fan of the board with thermostat, and override it with a diode from the output of the ramps, the fan not have sense if no heat is produced.
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