Mini 5 temperature monitor.
Finally squeezed the Mini 5 Ethernet into a case for the Ender 3, tight fit. Any reason I can't cut a super short thermistor and plug it into temp2 to control the case fans as the MCU of the 5+ doesn't have a working sensor. wont be super accurate but its better than nothing I'm thinking.
jay_s_uk last edited by
Do that and maybe tape it to the board/MCU/drivers somewhere
I use the hotend and bed heater temps to control the case fan in my ender3 with mini5. Same as the hotend fan. That way whenever a print is happening or a heater running the case fan will operate to cool the whole board.
Using the MCU to control the case fan from the internal sensor ont he other Duet boards only makes sense because it acts as a decent proxy for the board temp as a whole.
The MCU itself isn't likely to get very warm and can handle pretty high temps anyway. Running the fan based on heaters at least means the mosfets etc are being cooled when the heaters are running and you'll be sure to have cooling for the drivers during a print, because you can't print without at least the hotend heater on.
I have enabled the MCU temperature sensor experimentally in the Duet 3 Mini build of RRF 3.3beta3. As the chip manufacturer advises that it is not supported and should not be used, we can't promise that it will give useful readings on all boards. I will remove it again if it causes significant support issues.
@dc42 Excellent. Thank you I'll give it a try if it gives me issues I'll let you know and just fall back to one of the other solutions.
@dc42 So far so good on the mcutemp. Have it turning on the fan at 30 and increasing to full power through 45c. no idea how accurate it is but it is working. Seems to hold at about 35 in this tiny ender3 case I made with one fan. PI4 in there too so plenty of heat sources. No idea if thats good or bad but seems functional at least. Going to bump it down to come on at 25 so it will be on 20-30% minimum pretty much any time VIN is on.