Spurious heater fault during heating chamber

Jap

Hi,

I have faced heater faults when I turn chamber heater on and leave E0&E1 to 0C for eg. to dry filaments etc.
During the chamber heating E0 & E1 rises also, even not heated by their own heaters and at some point they will report error. I have M570 set to 15C.

By looking the pinned spurious heater fault topic there is a mention that heater monitoring is activated >45C.

Basic options would be:

Also put heater on for E0&E1 to same as chamber temp
Widen M570 excursion limit so temps in E0&E1 does not exceed the limit.

Is that 45C / temp monitoring limit hard coded? can it be changed?
Do you have ideas how to avoid this without need to but heaters on or modify M570 limits?

-jap

dc42

Why not set the extruders temperatures equal to the target chamber temperature, or a little higher?

Jap

@dc42 Yes that is what I´ve been doing so far. Just asking if there is a possibility to set that monitoring temp to eg. 100C or something else that I could avoid this completely. I know that´s not a big deal to set those manually, but..

dc42

The temperature at which monitoring starts is hard coded, so you would need to build the firmware yourself to change it.

Jap

@dc42 Thanks for quick and prompt reply. I´ll move on with the old style