I am noticing the nozzle temperature on my Repeat is not stabilizing very well. In the screenshot below, I am running at 220 F nozzle temperature and it is fluctuating back and forth between 217-222 F.
I am using the Hemera 12v Direct Drive extruder. What would be causing this?
Oscillating fan? Over-zealous eunuchs with ostrich-feather fans? Five degrees of sizzling bacon?
Yes, I’m avoiding work. How could you tell?
I think you lost me at bacon
222F-217F is 5F. Five degrees. There’s a classic meme/game/joke about “six degrees of Kevin Bacon”. At those temps (still a little low for proper crispiness), I figured actual bacon would be more appropriate.
Hey, when I’m at the keyboard, nothing is safe. Especially my clarity, sanity, or ability to convey humor.
And for the record, this is always my head-canon for eunuchs with fans:
Have you run PID Tuning on the hot end? It looks very regular, so I’d guess it’s not unusual environmental stuff going on.
How do I run PID Tuning on it?
Also, I have recently moved it to a different location than before so the ambient temp is different. But the ambient temp is pretty constant and shouldn’t be causing this I wouldnt think. Just seems like it overshoots its target temp, falls back down too low, then overshoots again and repeats that cycle.
Check out PID autotune | Marlin Firmware
This tunes the behavior so that it should oscillate less.
oh wow!!! I forgot about that movie!!!
That’s it, hand in your membership card…
Don’t resist when they arrive… Or maybe resist a little.