Parris

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Flips and rolls . Fine tuning .
« on: July 05, 2018, 12:05:24 am »
LOS flying . ZMR 250 Thug .

Flips and rolls .

I'm very happy with the way this craft flies aggressively , and / or , passively . Depending on which Mode I'm set to . I have three Flight Mode settings . Progressively snappier from one to three .

My question :
     When I am in Mode 3 , Rattitude>Rattitude>AxisLock>CruiseControl , my craft hesitates , oscillates or bounces at around 10 degrees before coming back to level . I watch that in flight , and my automatic response is to just adjust my sticks .

     I can handle it . It's not a big problem when I'm in the open field flying . But , I don't always fly in an open field . I sometimes fly in a confined area . That's when it becomes tricky .

     Any suggestions ?


                                                                      Thanks ,

                                                                             Parris
Parris

Re: Flips and rolls . Fine tuning .
« Reply #1 on: July 05, 2018, 01:04:01 am »
Oscillation means your PI(D)s are too high.

You didn't mention whether you were using different PIDs for the different FMS positions.

I would consider enabling TPS in Stabilization->Advanced.

I have a similar Rattitude setup, and it helps a lot to simply release the stick sooner.

Parris

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Re: Flips and rolls . Fine tuning .
« Reply #2 on: July 05, 2018, 01:23:01 am »

   Thanks TheOtherCliff .

    I think my PID's are all about the same on each Flight Mode . I'll enable TPS on the snappier Flight Mode , ( 3 )  , and experiment with it .
    I just didn't want to upset all the other adjustments I had made in the other Flight Modes .

    Thanks a bunch ! I'll start working on that now . Run a few batteries . And, report later with my next issue .....lol.


                                                                       Thanks ,

                                                                              Parris
Parris

Parris

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Re: Flips and rolls . Fine tuning .
« Reply #3 on: July 05, 2018, 02:15:56 am »
Settings picture in attachment .
Parris

Re: Flips and rolls . Fine tuning .
« Reply #4 on: July 05, 2018, 04:08:43 pm »
Oh yea...  Oscillation can be caused by ESCs running a slow old protocol like [email protected] which needs lower PIDs than the default ones.  If that is the case, instead of lowering PIDs, you should use a better ESC protocol/rate, at least [email protected] or PWMSync.

Parris

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Re: Flips and rolls . Fine tuning .
« Reply #5 on: July 05, 2018, 08:01:13 pm »
I have Little Bee 20 amp ESC's . I've been flying this off and on for 2 years .

Output Configuration file attached .
Parris

f5soh

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Re: Flips and rolls . Fine tuning .
« Reply #6 on: July 05, 2018, 09:00:01 pm »
Your PID settings looks like just defaults.
Try lowering the Outer Loop Pterm from 2.5 to 2.0

You should do some tuning and lower a little bit the "P" term values on Rate/Inner loop.

Parris

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Re: Flips and rolls . Fine tuning .
« Reply #7 on: July 06, 2018, 01:26:28 am »
Thanks , f5soh . I'll try that adjustment . Waiting for the summer showers to end first .
Parris

Re: Flips and rolls . Fine tuning .
« Reply #8 on: July 06, 2018, 11:23:18 pm »
I have a kingkong 300 hex that has been a nightmare to get airborne. But, finally took flight today, but i noticed, it has a twitch, and shutters a little. PID's issue?



Sent from my Moto E (4) Plus using Tapatalk


Re: Flips and rolls . Fine tuning .
« Reply #9 on: July 07, 2018, 06:57:43 am »
PIDs are usually a regular oscillation.  Twitch and shudder sound different than that.  A video, best from on board, would help.