@dc42:
Auto tune in 1.18 will always overshoot the target temperature. You need a larger difference between the target temperature you use in M303 and the temperature limit set in M143. You should use the default P1.0 in M303.
Thank you!
I set the temp limit to 400C (the limit of the PT100)
; Heaters
M143 S400 ; Set maximum heater temperature to 400C
Then set the target to the highest temp of filament I plan to use
M303 H1 P1.0 S380
This was the console message:
Warning: Heater 1 appears to be over-powered and a fire risk! If left on at full power, its temperature is predicted to reach 609C.
Auto tune heater 1 completed in 545 sec
M307 H1 result:
Heater 1 model: gain 589.9, time constant 284.6, dead time 5.0, max PWM 1.00, mode: PID
Computed PID parameters for setpoint change: P17.2, I0.061, D60.3
Computed PID parameters for load change: P17.2, I1.100, D60.3
Any Suggestions or is it safe to leave like this? Not sure if the parameters adjust for the over powered message automatically.