Error: Heater 0 fault: heater monitor 0 was triggered
-
I grew impatient and reset the printer. I then sent the following:
M303 H0 P0.4 S120I'll wait without changing anything now.....
Regards David Maher
-
Hmmm, I seem to have this error when doing the Autotune:
1/14/2021, 12:34:32 PM Auto tune cancelled because target temperature was not reached
1/14/2021, 12:04:32 PM Auto tune starting phase 1, heater on
1/14/2021, 12:04:26 PMI'm not sure if it is related or not to my original issue. I'll try turning the bed heater on now with a 120C target.
-
No issues getting to, or maintaing the bed at 110C, which is what I ended up commanding the printer to do. I'll try printing something now and see if there is any change in the errors after the FW upgrade.
-
This is the heater graph now, while the printer is printing a calibration cube.
As you can see the temperatures are fairly constant according to the graph, which is how they were before.
The big difference this time, is that the bed heater error hasn't occured (yet). -
@dmbgo said in Error: Heater 0 fault: heater monitor 0 was triggered:
How long does the new tuning algorithm take? It seems to be hovering around 80C atm,. I told it to tune to 120C.
It can take a long time.
-
@dmbgo said in Error: Heater 0 fault: heater monitor 0 was triggered:
M303 H0 P0.4 S120
Why did you reduce the PWM factor so much?
-
@dmbgo said in Error: Heater 0 fault: heater monitor 0 was triggered:
Hmmm, I seem to have this error when doing the Autotune:
1/14/2021, 12:34:32 PM Auto tune cancelled because target temperature was not reached
1/14/2021, 12:04:32 PM Auto tune starting phase 1, heater on
1/14/2021, 12:04:26 PMAutotune didn't work, the second attempt at autotune led to the error above, however printing with the heatbed PID settings from an earlier firmware version that did successfully autotune, I have not experienced anymore heatbed errors.
Given that the errors were very constant, I think that it might be fixed.
Thanks! -
Oh and the reduction of the PWM factor was from the example at:
https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control -
Yes the previous tuned values should still be valid.
I would try tuning again with full power to see if it has better luck hitting the commanded temp.
-
It's just an example of how the power factor can be used. Normally you'd want to tune at full power. I'm going to change that example. Actually I don't see that example at all in that tuning link, but I did find it in the M303 entry in the gcode wiki and have changed it to use 100%. The only times you'd want to use that is with an overpowered heater that is throwing "heating too fast" errors.
-
That makes sense Phaedrux. I was wondering why it was 40%. Given that the errors seem to have gone after the FW update, and the bed is stable, do you see any reason not to move on?
-
Nope, I think you're good to go.
-
Thanks for your help.
