Crash, Bad PID?

Hi all, recently I took my copter x for it’s maiden flight and quickly it entered an overcorrection cycle with roll and pitch, included is the log file. I’m wondring if this was a result of being in loiter mode or perhaps bad tuning? Any assistance would be appreciated!

Thanks!

Hello Russ, welcome to the community,

Maiden flight in loiter mode? You do know that no tuning is bad tuning, right?

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Yeah i figured as much, but is there anything else i should look pre-flight for on the next flight (i went thru initial tune and AMC setup already) my CG is close to center of props and P:W ratio is close to 7:1. Appreciate the input, anything helps.

The link has an access requirement. Remove that for assistance.

Post the zip file that AMC creates when you press the “zip files for forum supoort” button.

That one is small enough to be directly attached to a forum post

Will do that in the future, In the meantime I opened the link for open access!

There isn’t much to see in this log but yea, you should be in Stabilize until you can get a stable hover even if it’s a rough one. Chances are you will need to reduce the Rate PID’s (try 1/2 of default) and once a hover thrust value is established set the vertical acceleration controller gains accordingly. I don’t know how far you got with the AMC but you would encountered this early on.

The .zip file will tell us exactly what he did, and how good he did it.