Huge overshoot on heating and rapid cooling after PID
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Hey guys, so I've run countless pid runes from ambient temperature but no matter what on first hear up it over shoots by about 20c causing a heater fault to flag... But when it settles, as soon as my part cooling fan comes on it drops about 20 - 25c within a few seconds...
The extruder is a BIQUH2 with a 50W heater cart.
The strange thing is the system seemed to be fine when using a steel nozzel but since switching back to brass this happens, i've done a PID tune at least 5 times now
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@craigrobbo How are you doing the pid tuning? Tuning as a tool by using M303 T0 S250, or what temp you need. It'll take the cooling fan into account. You can use M143 to a higher temp if need. Add a sock or position the cooling fan to not blow on the heater.
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Can you share with us your firmware version, what command you used to tune, and the resulting values? It can also be helpful to see a picture of the temperature graph from when you get the fault.
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@stephen6309 said in Huge overshoot on heating and rapid cooling after PID:
e cooling fan to not blow on the
Im using the exact command you given me, M303 follows by the T0 and i am using S200 as its my most common temp
