I wonder when the klippy.log file is updated with the readings from the printer and when not?
I have a problem with my extruder temperature. During some prints I get the “Heater extruder not heating at expected rate” error. This happens now 3 times with the same gcode and once with a slightly changed gcode file. With test prints I don’t get it but they may be too short. Also the error seems to happen always at the same location of bed (X/Y position). So I figured it might be the cabling to the sensor but didn’t see any loose or damaged parts at the hotend or the cable and its sockets.
So I downloaded the klippy.log file and displayed the extruder temperature over time using a jupyter script. There I see that the extruder temp jumpes from 200°C to 110°C from one entry to the next. Then there is another entry at this temperature and then it jumpes back to 200°C. see:
So Its obviously not a physical problem but a signal problem (broken wires not counting at physical for now) since there is no way the temperature can drop/increase that much.
Also I do have problems connecting to the printer with klipper from the raspi sometimes. Then I turn off/on the printer and it usually works fine. So I wanted to check the connection stability.
Therefore, I checked the klippy file over time but it appears that the entries are not continous.
How can I assure that the klippy file is updated continously even when not printing? Is this a normal behaviour?
PS: printer is anycubic chiron, klipper on raspberry pi 4