pitchy KK quad

[Basmntdweller]

I just built a quad based on a clone KK board I got from Value Hobby. It has one of the 450 size plastic frames with the carbon/glass center pieces.
I started at 50% on the gain pots. Roll feels great, nice and smooth and predictable but pitch is rather squirrely. It does okay as long as I keep all inputs really smooth. If I jab at the stick it will start kicking back and forth a bit before it settles down. It also tends to over-react to inputs. If I give a medium forward command it will drop it's nose and try to haul ass away. It is almost like I have a bunch of reverse expo in the radio. Aileron doesn't do any of this behavior. I have tried turning the gain up and down several times but it doesn't really seem to make much difference.
One thing I have noticed is the #1 motor seems to lag behind the rest on spool up.


Thanks for any help, Matt

[petedee]

Have you rerun calibration?

Swap the motors around, one may be a dud.

Swap in a spare motor if you have one, I always order extra when I am building.

[pinguin]

What happen if you lower the pitch gain?

[Basmntdweller]

pinguin, I mentioned in my original post that adjusting the pitch gain had little if any effect on the way it was behaving.

Petedee, I had re-calibrated my ESCs a couple times yesterday thinking that might be part of the problem but it didn't change it. I decided I would do all four one more time tonight. It worked like a charm! All the pitchy behavior is gone and all four motors spool up together. Much smoother now! Thanks!!! I must have been doing something wrong yesterday when I was trying to re-calibrate them.
Now I have to get some orientation lighting on it so I can see what it's doing in flight. I've just had a small dot of black magic marker on the #1 arm for my test flights so far.

Matt