Hello I built a new quadcopter but broke two of its arms. This was my first quadcopter maiden flight ever. It is very sensitive. Any ways to make it less sensitive?
Thank you

You have to adjust PID values, which is your Flight Controller?

I think it was already set. Using kk2.1 board.

Can you please explain me about PID values?

What size quadcopter are we talking about? Whats the weight? PID values have to be adjusted accordingly. to reduce sensitivity try using some expo on the transmitter.
for an explanation of PID values try this: http://blog.oscarliang.net/quadcopter-pid-explained-tuning/

Thanks.Its450 size.Weight is 800grams.

I mean you have to adjust values according to its sensitivity,
Anyway what is your setup? Motors ? and Dia?

Try OscarLiang's forum, He has some best tutorials, I studied a lot from there.

Motor dia 28mm
Speed 1200kv
30amp esc
11.1V lipo

I rebuilt the quadcopter after the crash.Now its much more strong.Still not able to balance it. It tilts towards right, left... I mean its not stable while taking off. I tried subtrimming too.

PID values which I set for now.

P Gain: 50
P Limit: 100
I Gain: 25
I Limit: 20

Which is your Flight control board?

I have posted it earlier. :)Its kk2.1 board.

Refer this link,
http://oddcopter.com/2013/01/06/easy-diy-quadcopter-build-part-4-tuning/

One more thing, Hve u done throttle calibration with ESC? Which are ur ESCs?

Just Reset your KK2 Board with Factory setting.
And Re-calibrate your Escs.

Maybe it can solve your Problem.

@sooraj, I have already calibrated.
@Rcproduct, that would be my final option.

What actually is your quad doing, can you post a video or something,
normally a quad wont stay still in air unless it has GPS. there will be some small corrections needed in most of quads for various reasons. PID plays a major part in stability but the geometry of the frame is also important. are all your prop shafts perpendicular to the arms? self stabilization setting can make your quad go crazy and make you to chase the quad to stay in one place.

Ashok.P

Sir I will try to post a video. For now I am posting the pics of it.The problem is that when I try to take it of the ground, it either tilts left, right, front or back.I mean its not stable. So unable to take if off.

There is the quad.

That is a beautiful build, Sad It's not in the air.
What is your center plates , Glass fiber PCB?
Is this X or + mode ? If it is X , Do you programmed your KK board to X mode? Is your Flight control board in correct orientation?

i think direction of the kk board is not correct/motor connections are swapped.

if yours is X Quad

as per your motor arrangements the black arrow is your Front/Back
as per kk board the red arrow shows Front/Back

so turn your board 90 degree  left or right

also refer second image

Nice catch Akhil.
I would also suggest Kiran not to the place the FC inside the foam box, instead cut 4 /5 symmetrical pieces out of that foam and stick it on the edges of the FC. Then place the FC on frame.  

Thanks Akhil sir.I will try doing that.
@SideWinder, I have cut the bottom part of the foam box.I have surrounded the foam around fc.

Sooraj, yes it has pcb center plates.It is X quad.