Hotend temperature fluctuations
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Hi,
I wanted to know how to get rid of these temperature fluctuations?
They are +1-0.5 degrees for the red one and +2.5-1 °C for the green one.
The red one is my main with a PT100 tuned for 420C and the blue one a thermistor tuned for 300C.I read somewhere that when autotune does not get rid of these fluctuations, you have to increase the dead time by 30%. However i haven´t noticed a change.
Any idea?
Max
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Maybe you could try the PID settings instead, these should be listed when you autotune. To me it looks like the P part is to high, so try cutting it to half. I would also tune at the temperature that you intend to keep, so 300 in this case.
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@urban said in Hotend temperature fluctuations:
Maybe you could try the PID settings instead, these should be listed when you autotune. To me it looks like the P part is to high, so try cutting it to half. I would also tune at the temperature that you intend to keep, so 300 in this case.
I know it would be better, but i print with PPSU at 395°C regularly.
What do you mean by PID? how do you change the ADC values from the autotune to PID? -
The M301 command. When you do the autotune the PID parameters are printed at the end of the tuning.
Hmm.. I also remember that I forgot to insert the ADC values in the config.g once and they disappeared somehow. Maybe that happened to you as well?
PID is the way you normally control a temperature. This is a good site to explain it:
http://brettbeauregard.com/blog/2011/04/improving-the-beginners-pid-introduction/
