So suppose I run firmware 3.4.5, I have my heater tuned (several times) and in 90% of cases all is fine. In the last 10% of the cases, the heater faults out during the initial stages of heating from cold to operating temperature (usually closer to the final temperature). The error is always something to the effect of 'the heating rate is lower than what is expected'.
Once operating temperature is achieved, the heater seems totally reliable.
M307 gives me R,D,E and K parameters to play with.
What parameter(s) should I tweak slightly (and in which direction) to signal the firmware that a slightly lower heating rate is ok while at the same time not messing with the perfectly working situation once the heater is at operating temperature?
As it happens, this is for the hotend and not the chamber heater but the question really applies to any heater.
Can I just reduce my R value a bit (which seems to primarily be relevant when the heater is cold but that is not where things fail) or will that screw with things at operating temperature.
My apologies if this post is seen as a thread highjacking - it is not meant to be and I think the question is relevant in the spirit of the original question.