Attempting to Pid tune my heat bed...
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Hi, I am trying to pid tune my heat bed. I had it tuned by messed up and erased my config. Now the pid tuning seems to go on forever. More than 35 minutes. I tried sending a cycle value M303 H0 C5 S60 but still seems to go on a VEY long time. It seems to loop in phase 3. The note indicates "Auto tune starting phase 3, fan off" . I am not sure what fan it is referencing. I had to move my part cooling fan to f1 as f0 doesn't seem to work properly (wont turn on fan).
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What firmware version are you using? It sounds like you might be describing the new tuning algorithm from the beta releases.
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I am at 3.2b3_2.
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In that case, see here: https://forum.duet3d.com/topic/19761/new-heater-tuning-algorithm