Printer Model: Elegoo Neptune 4 Max klippy (1).log (4.8 MB)
I’ve been having this issue for months, where my printer will get partway through either bed levelling or printing and I’ll get the error
“Heater extruder not heating at expected rate See the ‘verify_heater’ section in docs/Config_Reference.md for the parameters that control this check. Once the underlying issue is corrected, use the “FIRMWARE_RESTART” command to reset the firmware, reload the config, and restart the host software.”
I replaced the entire extruder unit in case something happened inside that damaged the extruder but i’m still getting the same issue. This is my first printer so I’m still learning and I have no idea how to fix it.
extruder: target=210 temp=184.9 pwm=1.000
Heater extruder not heating at expected rate
Transition to shutdown state: Heater extruder not heating at expected rate
I would check your hotend heater and thermistor connections.
I thought it could be an issue with those parts too, so i replaced the entire extruder unit on the printer, but i’m still getting this error, so I believe it’s something else, unless I didn’t replace the thermistor. Is the thermistor inside the extruder unit or is that somewhere else?
The thermistor and heater are inside the hotend. The extruder is what moves the filament. The Neptune 4 uses a direct-drive extruder, meaning the extruder sits on top of the hotend.
Since you replaced the print-head (often called the extruder), I’d check your electronics board for a faulty connection.
Based on this graph, first there’s a lot of fast temperature variations. Since the temperature physically can’t change that fast, this is likely a thermistor wiring issue.
Next, we see the hotend heater drop. This is the kind of graph we’d normally see when we turn off power to the heater, but the target (dotted red line) is still commanding the heater to heat. This part of the graph looks like one of two possibilities:
The heater plug wiggled itself loose from the mainboard
The heater itself fell out of the hotend (If this is the case, Klipper just saved you from a fire)
Hey, i had a similar issue with our 4 max. While monitoring it in the fluid interface, i noticed that the temperature instantly dropped to -50 degrees. Since the block can’t physically drop that quickly, i started looking for loose connection.
It was the conector at the extruder end being loose, even when properly seeded, so when the cable stretched at the far side og the x axis, it would partially disconnect..
