Issue after autotune 303. Temp drops big time when fans kick in.
Hello, Machine is Rostock Max V2 (Rambo board) HE280 Hot end upgrade. Used to work fine ish (hotend consistently running 5 degrees lower than set). I ran it like this for 2 years.
Ran autotune M303 P0 S235 x0. Didn't seem correct. Than I ran M303 P0 S90 x0 and it seemed perfect.
210 Degrees maintains great within a degree or 2 ... UNTIL the the fans kick in. Then the temp keeps dropping to less than 190 until hardware reports a fault and the print is stopped. It appears that heaters are full on and trying to keep up. (led light solid on RAMBO)
PID Incorrect? Heaters just not keeping up? Fans blowing too much air on nozzle? Should I install a Silicone sleeve on the hot-end?
Any help is much appreciated!
To solve your problem you need either more power or less cooling. Problem is that every extruder needs a special temperature distribution to work. So yes, you can isolate bottom part so filament blower does not hit the heater block. That is normally ok. But as soon as it gets too much heat fluid can walk up and that will cause extruder to jam. Actually that is why jams happen. So you need to keep inside limits of the extruder. I don't have this one so can not say how hard that is. Maybe it is also just the heat cartridge that is not getting that hot any more or has not the good contact to the metal it should have.