PID Tuning/ Heaters troubleshoot

sleepless

I ran a m303 for both my bed and my extruder then sent m500 to save.. I was printing pla with the bed at 60c no problems and when I went to print nylon my Heated Bed had an error occur and stopped the print. So today I ran another PIDWarning:
No M501 command was executed in config.g
4:48:14 PMWarning: Heater 1 appears to be over-powered. If left on at full power, its temperature is predicted to reach 470C.
Auto tune heater 1 completed in 358 sec
Use M307 H1 to see the result, or M500 to save the result in config-override.g test and got this message

Stephen6309

@sleepless Overtemp warning is letting you know how hot it could get if the heater gets stuck on.

To use config-override.g, you have to put a M501 in your config.g at the end of the file.

sleepless

Warning: Heater 0 appears to be over-powered. If left on at full power, its temperature is predicted to reach 185C.
Auto tune heater 0 completed in 566 sec
Use M307 H0 to see the result, or M500 to save the result in config-override.g

sleepless

@stephen6309 ; Heaters
M307 H0 A134.3 C404.8 D0.4 B0
M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S110 ; Set temperature limit for heater 0 to 110C
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S300 ; Set temperature limit for heater 1 to 300C
M501 ;

dc42

@sleepless said in PID Tuning/ Heaters troubleshoot:

No M501 command was executed in config.g

That warning is issued when you use M500 to save some settings, but you didn't have a M501 command in config.g when the Duet was started; so those settings won't be loaded when you start the Duet. You can either add M501 at the end of config.g, or you can enter the M307 parameters manually in config.g instead.

185C isn't too bad for a predicted bed temperature when left at full power, so IMO it's not unreasonable to ignore that warning.

sleepless

@dc42 cool if you say dont worry then Ill ignore that warning for now. its working now since i put the m501 in the config.g
But i only ran one print. Today I will run some more tests just to be sure.

sleepless

Error: Temperature reading fault on heater 0: sensor open circuit
Resume-after-power-fail state saved

dc42

@sleepless said in PID Tuning/ Heaters troubleshoot:

Error: Temperature reading fault on heater 0: sensor open circuit
Resume-after-power-fail state saved

Dodgy bed thermistor connection?

sleepless

I think you are right I am trying to order a new bed heater and therm

sleepless

It was a faulty bed