P and I setting

[nitros]

What are they?
What they do regulate?
Can you please explain that in plain english please?

Thanks

[Sesame]

I don't know if this helps you but I found it on HF when having problems with setting up my Brain FBL, here is an excerpt.

Proportional Gain is the general correction strenght and interpretation of the tail stick input. The higher it is, the faster it reacts to our sticks inputs Too high gain will generate a tail oscillation. It's the Tail Gyro gain in the receiver parameter.

Integral Gain is a time value. It "schedules" the tail angular position control. It's exaclty like the Heading Hold gain on a regular gyro to make it simple.The higher the value is, the harder the tail is locked.
But too high value will give some bounces on hard stops or oscillations in hovering ( or both..).But it will also setup the consistency of pirouetting..

So The tail gets an input from the pilot. Proportional gain will command a tail movement, hard or soft depending on the Proportional gain. The Integral Gain will then check the angular position of the tail repeatly, on slow or fast cycles and detect the tail angular position.

Derivate gain will affect the stop behaviour of the tail, hard or smooth, based on prediction of the need of correction to stop the tail correctly depending of the flight characteristics needed ..

if you want the full document as it describes how to use them which is quite handy it is here - remember this was written specifically about the brain, but it must be relevant for the other fbl controllers

Advanced parameters glossary - HeliFreak

hope it helps

[KnifeEdge]

this PDF is also helpful

http://www.google.co.uk/url?sa=t&rct...PpBdFA&cad=rja

[HGJL2009]

We use P.I on quad flight controllers as they are 3 axis as well as Heli FBL, simply put P is gain, how fast you want it correct and I is the overshoot correction. Usually you take I down to zero and tune P until you have a slow speed wobble, then back off a touch. You increase I until you have a high speed wobble and back off a little. There are some you tube video's on how to tune P.I on the first page of the KK2 forum.

The new KK2 FC, info and Q&A in first post. Read it before asking a question. - RC Groups

just forget its got props, its still 3 axis.