Thermal runaway error even after two thermistor replacements Eder 3 v2
TroubleshootingNew printer? Did you check that the mains voltage selector on the power supply is set correctly for your region?
Thats a good shout, but I had this one for about 2 years now :/
OK. A stud thermistor is going to take longer to warm up than a glass bead thermistor, so this is more likely to trigger a thermal runaway error. You should probably do PID auto-tuning. Also, use a silicone sock. If you don't like glass-bead thermistors, you could switch to a cartridge thermistor, but you may need a new heater block, and you may also need to change the thermistor type in firmware. I'm not sure if you need to change the thermistor type for a stud thermistor.
I've never had a bed thermistor go bad. Hadn't even throught of that. That's a great idea I'll check that next.
Few thoughts... Right temp coefficient and nominal resistance on the replacements?
I had an issue like this with a sprite extruder on an E5S1. Pulled my hair out only to find the ribbon cable was bad. Ohmed out okay but wouldn't work when heat applied. Chased my tail for hours and hours.
Maybe something similar?
Check wiring back to board? Disconnect thermister and measure at mainboard terminals, short, check again.
Put a dummy 100k resistor in and see what it reads.
Background: I'm 10 year vet of 3d printing I've had all the cheapo budget printers over the years with the classic issues, I should be able to troubleshoot this but I'm stuck and it's driving me crazy....
Context: I had a thermal run away error 10 hours into a 24 hour print, I tested and confirmed the issue was thermistor connectivity (I thought). I ordered and replaced the cheap thermistor with a beefier screw in part (common upgrade). A thermal runaway error happened during preheat even after connectivity testing so I assumed the thermistor was dead and ordered a new one. I installed the new one, worked great until it didn't (see photo). About 10 mins into a test print it threw the thermal run away error. I restarted the printer and restarted the print. its currently running fine. If I agitate the thermistor wires it doesn't error out, so I know the connections are solid and the error couldn't have been caused by another dead thermistor. What could have caused the thermal run away error?
Fellas, what am I missing here.