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Unwanted pitch up
#1
On one of my quads I get unwanted pitch up when I do a 180 turn at speed. I have to push stick forward to keep it from doing that. Another of my quads does turns perfectly but I can't copy the PIDs since one is using 5 inch props and the other 4 inch.
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#2
I might suggest reading up on PID tuning.  You didn't really give us much to go on.  Lots (and I mean LOTS) of info out there on PID tuning, troubleshooting, etc.

Around the 4:00 mark, Joshua mentions that his quad is pitching 'up' after a few maneuvers.


~illushinz (CenFloFPV)

FPV noob.  
Arris 250FPV, Naze32 Rev6 Acro
ZMR250, Naze32 Rev5 Acro

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#3
(23-Nov-2016, 03:14 AM)illushinz Wrote: I might suggest reading up on PID tuning.  You didn't really give us much to go on.  Lots (and I mean LOTS) of info out there on PID tuning, troubleshooting, etc.

Around the 4:00 mark, Joshua mentions that his quad is pitching 'up' after a few maneuvers.



I've actually done a pretty good bit of reading and watched that video. I don't remember what he said so I'll go back and watch it again.

Thanks,
Randy
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#4
I'm also new to the whole PID tuning thing, but the first thing I'd try is lowering the yaw pitch rate
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#5
stupid question... can it be related to center of gravity ? (ie battery placed on the back, you do the spin your "front" goes up, you correct via stick input)?
All the best
Grzesiek (Grisha/ Greg)

Curently flyable: Nox 5, Minimalist 112
Bench / in progres: fixing Nox 3,  Scrap
thinking about building: 450


[-] The following 1 user Likes Grisha0's post:
  • sloscotty
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#6
Assuming the center of gravity is more or less correct, solution should either be to increase pitch P or pitch I.

Unless there's other problems which could be checked for in logs. Like one of the rear motors lacking response time or something on quick throttle-up (i imagine you kind of 'jump' into corners with pretty low throttle). In case this happens at zero throttle you could also increase min throttle.

Btw what firmware? Maybe airmode off?
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