raspberry_user wrote: ↑
Tue Jun 23, 2020 2:01 pm
bjtheone wrote: ↑
Tue Jun 23, 2020 1:26 pm
Assuming the enclosure is to stabilize print temperature and possibly cut down on noise, just how hot are we talking about. The Pi will thermally protect it self so you don't have to worry about damaging it. However, I suspect you don't want it shutting down mid print.
Certainly a fan will help, but you are obviously going to be limited to whatever the localized air temps are. Any possibility of keeping the Pi outside the enclosure?
I heard that the filament melt when the nozzle is about 260c so it will be very hot inside the enclosure.
If putting it outside, should I get a heatsink or fan or a combination of both?
If your Pi is outside the printer enclosure, you probably don't need a fan for it, and a heatsink will only help you/it if there is provision for airflow through whatever case or enclosure the Pi itself is in. I recommend putting Pi 4s in something like the Flirc case, which acts as a big heat sink and radiator, and avoids the problems of adding a fan (noise, additional power usage, and dust).
If your Pi is inside the printer enclosure, nothing you can do to the Pi will serve to keep its temperature below that of its immediate surroundings, and if these are above 70 deg C, the Pi will inevitably throttle. If its surroundings get much above that temperature, the Pi may not be happy!