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Hey guys i just recetly strated having an issue with my tronxy p802ma with an e3dv6 clone hot end. Whn i set the hot end temp to 250 it will flucuate from 239-252 same if i set it to 200 it goes from 194-204. I have ran the PID autotune and this just started randomly i hadnt chnaged anything just started one day. Any advice is appreciated.
I'd recommend double-checking your firmware configuration to make sure you have PID temperature control enabled and haven't set bang-bang control accidentally. Those ranges sound very similar to how bang-bang control works.
Other than that, it might be worth trying either a longer PID autotune, or adjusting it by hand somewhat... in particular, oscillations like that can often be improved by increasing D, possibly with also lowering I unless it's already quite low.
For reference, I'm using a similar setup (P802MA with V6 clone), and using "M301 P22.2 I1.08 D114.00" for settings. However, since we both have clones, there's no promise that will actually work.
Ok ya I had similar settings as well I will try and longer one and try by hand. Thanks for the help!
i should add i have also replaced the thermistor
Did you replace the thermistor before or after the problem started?
Things to check:
Yes I replaced it with the same one and no part cooling fan is off and I have the sock on it as well