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2 18-Feb-2017, 08:49 PM (This post was last modified: 18-Feb-2017, 09:12 PM by molitar.) I know my PIDs are off on my BAT QX105 as when I go to launch into the air it is bouncing up and down. I can't land it or take off smoothly.
Is there a good video that shows what PID's for what symptoms?
Secondly which setting controls throttle it wants to rise at half throttle so I know my throttles are up too high should be stable at 50% from what I been reading.
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1 18-Feb-2017, 09:08 PM (This post was last modified: 18-Feb-2017, 09:09 PM by Helibus.) Just starting to dig into tuning myself. FWIW, this video is referenced in the cleanflight documention on PID tuning -
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30 19-Feb-2017, 04:07 AM (This post was last modified: 19-Feb-2017, 04:13 AM by fftunes.) Bouncing on landing is pretty much normal, and it will be worse the more "locked-in" your quad is... It's because any contact with ground will cause some motors to counter-act, in order to keep attitude. Best tip is to hover as low as you can, then disarm and let it drop.
As for launching, pretty much the same... give it a quick throttle push to get in the air high enough to get out of ground effect.
The issue with hover point not being at 50% throttle stick... well that's another thing (and i wouldn't recommend it - imagine the high power/weight ratio, what you want to achieve would result in very little stick resolution for a large part of the available power).
Easiest would be to use throttle curves in the transmitter. The throttle curve in betaflight is not really functional yet (version 3.1.5 as i'm writing this). Throttle mid does nothing by itself, it's only an adjustment point for throttle expo. You can make it work if you set throttle mid to 0 or 1 and then use throttle expo to bend the curve.
But either way, hover point will wander anyway as battery power goes down... there's no compensation for that.