PID values for PX4 and ArduPilot

Hello. I have a problem of unstable flying quadcopter with PX4. I supposed the PID tuning was a bit of.
And had accessed a tuned values for my drone but it was in the ArduPilot flightstack. So I installed that and that for the most case solved the unstability. So the question is that PID variables are interchangable between two flight stacks? Or they are completely different from one another?

I don’t know exactly but I’d assume they are not interchangeable. I suggest to start off with default params in PX4 and then try auto-tune, unless your copter is very big or different from a standard sort of build.

Also, make sure to read through the tuning instructions, for PX4 it’s here: Multicopter PID Tuning Guide (Manual/Advanced) | PX4 User Guide. And for ArduPilot there are also great ones in the wiki.

If you want help here in the forum, then it’s best to describe exactly what you tried, and what happened, and it’s important to share a log (bonus would be a video).

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Thank you for your reply. Then I will follow the autotune route.