There’s no way the hot end’s temperature is changing that much and that rapidly in such a small time period. Rapid 1-2 °C fluctuations? Sure. This is significantly bigger than that.
Comment on Tell me I have a thermistor wire failing without telling me...
SzethFriendOfNimi@lemmy.world 1 month ago
I think I need more coffee. Does the chart show where the thermistor failed?
I’m kind of worried that it’s not obvious and if it happened to me I’d miss it.
IMALlama@lemmy.world 1 month ago
SzethFriendOfNimi@lemmy.world 1 month ago
Ahh. I see that now. Not cycling like it normally would.
odious@lemmy.world 1 month ago
+1. No idea what’s supposed to lead to this conclusion. I’d say that’s a bad PID tune.
IMALlama@lemmy.world 1 month ago
The drops especially are way too steep for this to be a PID tune. There’s too much thermal mass to loose that kind of temperature basically instantly.
Lots of wandering around? PID tune seems like a good starting point, especially if something on the printer changed. Defying the laws of physics? Something else is going on.
ikidd@lemmy.world 1 month ago
If you got used to looking at your graph and saw those dropouts, you start looking for a physical problem.
asbestos@lemmy.world 1 month ago
The short timeframe and variations that are way to high even for a mediocrely tuned PID
SzethFriendOfNimi@lemmy.world 1 month ago
That’s worrying then. He can see the wires broken but it still has enough connectivity to keep chugging.
On the plus side if the thermistor broke enough that it would keep pumping heat into the system then thermal runaway protection should trigger at least.
IMALlama@lemmy.world 1 month ago
This is basically spot on. It’s not full open, but it’s close. This is the first print I’ve noticed it on. It wasn’t a long print, so I figured I would let it go and see what happened. If Klipper loses it for too long it will go into thermal shutdown. Ask me how I know :(