Heater extruder not heating at expected rate

[nmakan]

Printer Model

Voron 0.1

Hello all, I'm very lucky, a family member left for another country, and he gifted me with his Voron 0.1 Printer.

I did not build it, so, I'm trying to familarise myself with the printer, and how it works. One of the issues is that I am having an intermittent problem. I 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. printer is shutdown.

I'm really struggling with this. Effectively, the extruder does not heat up. When I look at the thermals, and I click on pre-heat, the Heaterbed warms up, but the Extruder doesn't. The fans all start to spin, and it seems like it should be getting warm, but the temperature does not move, it just displays the actual temperature. The Power graph also shoots to 100, so it seems like it is sending power, but it just flat-lines.

This has happened several times, and usually, if I try a few times, and wait sometime a day or two, it resolves itself. It is highly frustrating though.

I really would like to get this resolved, I just don't know where to start. I have tried removing the pins into the hotend and reinserting them, and that hasn't worked well. I am also not sure how to open up the hot-end, to ensure that the cabling is correct. Any guidance will be appreciated.

 

[shiftingtech]

So...it's basically unheard of for the hotend to just *sometimes* decide not to heat, unless there is a wiring issue.

(Anything on the software side would be more repeatable)

If I had to guess, I'd say you have a bad connection or partial wire break, that's highly sensitive to the exact location of the toolhead.

 

[claudermilk]

That definitely sounds like a wiring issue like @shiftingtech said or a bad hot end heater. What hot end is on the printer?

 

[informel]

put heater at let say 50 and touch it just to see if it's the sensor not reporting or the heater not heating.
if it is not heating then you know it is the heater, it cousd be a broken wire/connection or the heater is not connected where is should be, did it ever work ?
if it is heating then the problem is with the sensor, but I dought it, because if it was open you would see a crazy number for temp

 

[nmakan]

That's a great idea. It was working previously, and has been intermittently giving me the same error, now just more perpetually. I have found someone that can potentially repair it. It's been sitting with them. Hopefully after the holidays, it gets sorted.