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klack / marlin

GNU General Public License v3.0
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ISSUE: PID AUTOTUNE possible issue #30

Closed mine2209 closed 3 years ago

mine2209 commented 3 years ago

Description

Possible issue relating to Autotune

Steps to Reproduce

  1. Run PID autotune
  2. Preheat both extruders

Expected behavior:

Autotune and preheat no issues

Actual behavior: On two separate machines after PID Autotune, thermal halt has been called when preheating

Additional Information

Either extruder could be preheated with out issue and holds temperature, but when the other was preheated it would halt printer get runaway error. After additional PID tune and many power cycles from halt this issue appears to have gone, on my machine.

I would have assumed my machine issue but Skylineboy200000 had a similar issue after autotune which he put down to fault thermistor in E2 which was then replaced so not sure if issue would have resolved from additional tunings, and power cycles

Worth keeping an eye out for if anyone have issues after using PID

mine2209 commented 3 years ago

I did check back and when I did my PID tune on the GUI, it set E1 p39.74 i4.47 d88.4 and E2 p16.78 i1.28 d54.99

I ended up running them from terminal in my usual way and got E1 P23.47 I2.02 d68.25 and E2 p24.33 i2.25 d68.78 which I manually set and have had to issues with halts since.

EDIT: just had another halt now...Although says printer halt just realised it doesnt mention thermal runaway but that is what I keep assuming it is.

The above first set are obviously wild but I do not have a reason for it, my print room is on a thermostat all the time so I don't believe it would have been a temperature change in here causing it but I cannot rule out something on my end

klack commented 3 years ago

Fixed by PID tuning on TFT or manually for desired temperature.