So, I have created my own heater block for my 3D printer and mistakenly was using a 12 V, 40 W heater cartridge thinking that was the standard for my Ender 3, when in fact it is supplied with a 24 V, 40 W.
You may have seen my earlier post about when using autotune the temperature would overshoot by a large margin and returned the following error.
PID Autotune failed! Temperature too high
Graph of Overshoot:
I was unable to remove this overshoot even through manual tuning.
Now I have switched from the 12 V cartridge to the 24 V this problem is resolved, and I can now run the autotune. It follows a much more gradual curve when heating up so doesn't trigger the same error.
However, I am unsure why this is the case? Can anyone explain why the 12 V heater cartridge results in too high of a temperature increase?
It seems counterintuitive to me as I would have thought the higher voltage cartridge would heat up faster as opposed to vice versa?