PID Calibration ending with 0/5 cycles, Thermal Anomaly with Revo
I'm trying to print on a MK3S+ with a Revo running 3.14.1 firmware. It has been throwing thermal anomalies whenever it exceeds ~100° C. I think something is going wrong during PID Calibration because it is not behaving how I would expect it to. I have 6 MK3S+ printers, 3 have Revo hotends, and this is the only one that is having thermal anomalies.
Here are the steps I took, recommended by E3D:
I reinstalled the firmware, ran reset_revo.gcode, and factory reset my machine, attempting to run PID and Thermal model calibration between each step. Then I changed my heatercore for a brand new one, downloaded the firmware again in case it was corrupted, and did all the steps again. Each time I ran the PID calibration, it displayed the following weird behavior.
It displays "PID cal. 0/5" on the bottom line.
The temperature rapidly increases, and displays the temperature as T°/210°, where T is the current temperature.
When the temperature exceeds ~100 ° C, it switches to displays the temperature as T°/0°, where T is the current temperature, and the temperature starts decreasing slowly.
When the temperature stabilizes around 25° C, the bottom line stops displaying "PID cal. 0/5", briefly displays "PID cal. finished" and changes to display "Prusa i3 MK3S+R OK".
The only time it did anything different during a PID calibration was right after the reset during the setup wizard. Instead, it displayed "TM: initial C est." while heating up, then once it got above ~100° C, it says "STOPPED." and then "Print aborted". Then in the menu I can clear Thermal Anomaly. This is the type of behavior I would expect all the time. When I try to run a thermal model calibration, it runs until it gets just over 100° C, then the text displayed changes to display "STOPPED." and then "Print aborted".
Clearly it isn't completing the PID calibration. It is not heating 5 times and it is not reaching the target temperature the one time it does heat. However, it does not indicate a failure. Is this how the calibration is supposed to respond if there's a thermal anomaly during calibration?
If changing the heatercore, firmware, and factory resetting the machine didn't fix it, what else could be causing this problem?
RE: PID Calibration ending with 0/5 cycles, Thermal Anomaly with Revo
Hi,
I ran into the exact same issue—have you found a solution yet?
RE: PID Calibration ending with 0/5 cycles, Thermal Anomaly with Revo
I'm also running into the same issue. It was running fine on 3.13.0. I updated to 3.14.1 and started getting thermal runaway errors. Did a factory reset and cannot get through thermal calibration and I get the same outcome as mentioned when a do a PID Calibration. Printer is useless, currently.
RE: PID Calibration ending with 0/5 cycles, Thermal Anomaly with Revo
The only thing that fixed it for me was replacing the EINSY Rambo board.
It's easy to short the thermistor or heater when cleaning the hotend with pliers so my guess is I caused minor electrical damage at some point and the new firmware somehow triggered the problem. Maybe by detecting the problem, but then I don't know why downgrading and resetting didn't fix it unless it can permanently flag a problem in a way that won't be reset with a factory reset. Maybe the new firmware somehow pushed the boundaries of the electronics in a way that would normally be fine but turned the minor damage into permanent damage.
Whatever's going on, if it's affecting multiple people, I hope they take notice.
I hope you find a fix!