Hi All,
it’s a standard Ender 3 V2 Neo except for the board replacement to SKR Mini E3 V3. it has been working nicely for the last 2 months, then past weekend it started to generate issue with which it seems like issue keeping temperature up.
which then error out and gave this error
I’m not sure if this is a config thing because I haven’t change the config.
OR is the thermistor needs to be replaced?
I’ve also attached the log. thanks again klippy.zip (3.5 MB)
Before the error raises the extruder temp is not very stable and right before the abort it dropped 37°C.
Could you post the graph of such a heating attempt?
Did you perform PID tuning for hotend and bed?
A steep decline like this is usually a sign of a faulty heating cartridge. The cartridge or its wiring could be the cause. Such issues frequently occur only when hot or in motion.
No, I didn’t write it and
Apologies, I should have stated initially too that I have done the PID tune again which has still error’d from another print last night
Which cartridge? do you mean the thermistor?
after posting this, I had a thought of checking the thermistor, so I did and found lots of white powder inside. the thermistor itself looked okay. So i cleaned it and put it all back together. just doing another PID tune now.
@Sineos means the heating cartridge with those red cables right to the sensor.
The white powder could be thermal grease that dried out.
Those thermistors with glass pearls often do not have optimal contact to the surrounding heating block (tried to be improved with thermal grease…).
Maybe it was not properly fixed or became lose during the heating process.
Have a closer look to the heating cartridge and its wiring. Do not bend the wires too much as they are mostly quite stiff and might break.
Looking “okay” is usually not enough to diagnose potential errors, as many issues such as broken or faulty cables, or internal short circuits, cannot be reliably detected through visual inspection alone, unless a cable is completely torn off.
It’s possible that your heating cartridge appears to be in good condition, but may still be defective nevertheless.
When I checked in AMZ UK for heating cartridge, it seems to be pretty much the hotend and heating pipe cable. or do you mean I just need to potentially replace the heating pipe cable?
The cartridge alone is sufficient. It is quite common that they die and you cannot really change the cable as the it is potted inside of the cartridge. It only works for the cable you see but likely the issue is within the cartridge (unless the red cable is obviously damaged).
You can measure the resistance of the cartridge. For a 12V one it should be somewhere between 4 and 8 Ohms and for a 24V one typically between 10 and 20 Ohm (depending on the power rating and manufacturer specifications)
But again: Often these issues occur when hot or moving so this simple test may not be sufficient.
that’s what I’m trying to ascertain exactly what is heating cartridge. because when I looked around, it’s basically showing the whole hotend with both heating pipe and thermistor kit.
You already posted a photo of the right part:
Just check what voltage and wattage it requires and order such a heating cartridge with already attached cables.
You just need to check where the respective cables go on your printer.
Most likely it will end with a JST-XH connector plug that might be plugged into a daughter board or it uses screw terminals.
When a plug is used you maybe want to order a suitable crimping set as well.
There is no need to buy a whole hotend for such a simple task.
