Everything works fine and dandy until I release a full throttle punchout and the quad tends to dip forward and wants to roll right.  This is a new build and I'm stumped.  See the video for an example of what I mean at 0:17, 0:29, and 0:34.   The first part of the video shows that pitch and roll are fine until full throttle is released.



Parts:
Martian II frame
EMAX 2205 S motors
DAL props
Flycolor Raptor S AIO FC/ESC's
Betaflight 3.1.7
Blheli_S 16.6
DSHOT 600
Acro mode only (accelerometer is off)
Mid-quad is the center of balance
TPA set to 0.10
I've double checked all soldering and connections

Any thoughts?  Thanks.

Aside from adjusting PID (increase P and/or I) - did you try "antigravity" mode? It boosts i-term on quick throttle changes and should help in exact that situation.

There are 2 values to adjust in CLI to make it work right (don't know the names right now, you should find them by typing "get anti" i think).
One is the factor for iterm boost, default is 1.0 i think, most people i read set it to something between 3.0 and 4.5.
Other value defines how much of a throttle increase/decrease is needed to activate the effect. Default is 0.35 which means 35% of throttle range (in a very short time - if you're too slow you might reduce this value).

(22-Jul-2017, 11:30 PM)fftunes Wrote: Aside from adjusting PID (increase P and/or I) - did you try "antigravity" mode? It boosts i-term on quick throttle changes and should help in exact that situation.

There are 2 values to adjust in CLI to make it work right (don't know the names right now, you should find them by typing "get anti" i think).
One is the factor for iterm boost, default is 1.0 i think, most people i read set it to something between 3.0 and 4.5.
Other value defines how much of a throttle increase/decrease is needed to activate the effect. Default is 0.35 which means 35% of throttle range (in a very short time - if you're too slow you might reduce this value).

I've got it set to 3.0 and 35%.  Attached are my PIDs.  I would assume that they are increased enough.  They are perfect for everything but releasing the throttle punches.

Hm yeah they're pretty high already... Maybe you need to lower antigravity threshold? Friend of mine tried it and he found 0.25 was best for him.

Other than that - you could try to increase dterm transition slider a bit, would make it a bit more stable when roll/pitch are centered.

So the quad dips to front right if I understand it correctly at punch outs?
It could be hardware related though.. Let's troubleshoot!

First:

1. check if all your RX channels are centered at 1500 at idle
2. spin the motors with your hand, and see if your motors bearing sound normal, the same to other motors.
3. make sure all the screws are tightened properly: frame, arms, motor screws, FC screws...

If everything is fine at this stage and you are still getting the same issue... then you can move on to check the ESC and motors... It could be your front right ESC or motor...

Swap the front right ESC with the rear left one... test fly again see if it dips rear left this time... if yes then it's the ESC... if it still dips front right... then you can swap the motor as well this time...

If it still dips front right.. then we can probably rule out the motors and ESC's... and it's probably FC or Betaflight related...

Oh and i just read "acro mode only" - does that mean no airmode? That would make a big difference...

(23-Jul-2017, 12:59 PM)fftunes Wrote: Oh and i just read "acro mode only" - does that mean no airmode? That would make a big difference...

Yes, acro as in no horizon/angle.  Airmode has been on.



 I decided to start from square one before swapping motors and reflashed my ESC's and that seems to have fixed the problem.   Flies great now!  

Thank you for everyone's help!