uncontrollable thermal runaway & false triggering
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Right now I am facing two serious issues with Duet/RRF:
1.) the most serious one: Thermal runaway.
Not always but sometimes the number 3 hotend heater turns on at startup and stays on. After a while the thermal runaway protection triggers but this hot end heater stays on.2.) If no toolhead is connected to the #3 slot the Duet/RRF sometimes completely misbehaves. At random intervals, the thermal runaway protection gets triggered and the clear button in the web interface won't reset the heaters. Resetting it with G-code in the console works.
Steps already taken:
- measuring the hotend and machine-side electronics
- removing the microSD card/firmware -> heater won't turn on
What information is required to diagnose this?
Btw. If you want to switch to a more private/non-public channel for communication I am open for it.
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@asglödsfgldsklögsjklö probably want to start with board you're using (or boards if running CAN-FD), firmware version and a copy of your config files
