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« on: October 12, 2014, 04:29:27 PM »
kiran rc
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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
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« Reply #1 on: October 12, 2014, 05:14:32 PM »
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You have to adjust PID values, which is your Flight Controller?
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« Reply #2 on: October 12, 2014, 05:25:51 PM »
kiran rc
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I think it was already set. Using kk2.1 board.
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« Reply #3 on: October 12, 2014, 05:29:29 PM »
kiran rc
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Can you please explain me about PID values?
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« Reply #4 on: October 12, 2014, 06:36:28 PM »
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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/
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« Reply #5 on: October 12, 2014, 08:04:47 PM »
kiran rc
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Thanks.Its450 size.Weight is 800grams.
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« Reply #6 on: October 12, 2014, 10:49:09 PM »
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I mean you have to adjust values according to its sensitivity,
Anyway what is your setup? Motors ? and Dia?
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« Reply #7 on: October 12, 2014, 10:50:43 PM »
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Try OscarLiang's forum, He has some best tutorials, I studied a lot from there.
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« Reply #8 on: October 13, 2014, 12:03:23 AM »
kiran rc
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Motor dia 28mm
Speed 1200kv
30amp esc
11.1V lipo
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« Reply #9 on: October 23, 2014, 08:13:57 AM »
kiran rc
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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.
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« Reply #10 on: October 23, 2014, 08:19:55 AM »
kiran rc
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PID values which I set for now.

P Gain: 50
P Limit: 100
I Gain: 25
I Limit: 20
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« Reply #11 on: October 23, 2014, 10:22:43 AM »
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Which is your Flight control board?
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« Reply #12 on: October 23, 2014, 11:11:44 AM »
kiran rc
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I have posted it earlier. :)Its kk2.1 board.
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« Reply #13 on: October 23, 2014, 11:19:13 AM »
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Refer this link,
http://oddcopter.com/2013/01/06/easy-diy-quadcopter-build-part-4-tuning/
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« Reply #14 on: October 23, 2014, 11:20:10 AM »
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One more thing, Hve u done throttle calibration with ESC? Which are ur ESCs?
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« Reply #15 on: October 23, 2014, 11:44:02 AM »
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Just Reset your KK2 Board with Factory setting.
And Re-calibrate your Escs.

Maybe it can solve your Problem.

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« Reply #16 on: October 23, 2014, 06:31:55 PM »
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@sooraj, I have already calibrated.
@Rcproduct, that would be my final option.
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« Reply #17 on: October 23, 2014, 10:42:26 PM »
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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
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« Reply #18 on: October 24, 2014, 12:21:59 PM »
kiran rc
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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.
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« Reply #19 on: October 24, 2014, 12:29:24 PM »
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There is the quad.

20141024_122433.jpg
Re: Quadcopter suggestion needed
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« Reply #20 on: October 25, 2014, 12:03:55 AM »
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That is a beautiful build, Sad It's not in the air. Sad
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?
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« Reply #21 on: October 25, 2014, 12:43:59 AM »
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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

20141024_122356.jpg
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« Reply #22 on: October 25, 2014, 12:57:36 PM »
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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.  
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« Reply #23 on: November 05, 2014, 08:21:41 PM »
kiran rc
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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.
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« Reply #24 on: November 05, 2014, 08:25:31 PM »
kiran rc
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Sooraj, yes it has pcb center plates.It is X quad.
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« Reply #25 on: November 06, 2014, 12:11:40 PM »
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apart from all these also check ur transmitter trims. if ur quad is drifting then there might also be a problem with the trims.
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« Reply #26 on: November 08, 2014, 08:08:17 PM »
kiran rc
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Ok, identified.Its a faulty Fc.
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« Reply #27 on: November 08, 2014, 08:17:23 PM »
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Ok, identified.Its a faulty Fc.

are you sure with that?
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« Reply #28 on: November 08, 2014, 08:33:58 PM »
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Ok, identified.Its a faulty Fc.

Don't quickly, take that decision, there is so many problems with latest KK firmwares,
I was recently trying my luck with 2 KK5.5 flight control boards , Each time I upload the same firmware, the response is not same, me too even thought the board is damaged, but identified it is firmware problem, After uploading same firmware many times, Now I am searching for older version firmware.
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« Reply #29 on: November 08, 2014, 09:51:42 PM »
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I have not updated the firmware.I still have stock firmware on it.On the screen the gyro bubble is not working. Anyways to repair it?I even tried fractory reset.
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« Reply #30 on: November 08, 2014, 11:13:07 PM »
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try heating each gyros using hot air gun(you may need to remove display)
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« Reply #31 on: November 08, 2014, 11:36:57 PM »
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I think KK LCD boards have no seperate 3 axis gyros, There is SMD gyro+acc on it.

Is your stock f/w really for X mode?
Which is your stock f/w ?
(don't know if you already answered this questions.)
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« Reply #32 on: December 08, 2014, 09:12:28 PM »
kiran rc
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Ok finally flies after replacing fc board.When I try to land, it comes down very quickly and unstable. Is this due to esc?.they are not simonk.I think the rate is too slow.Should I change esc?
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« Reply #33 on: December 08, 2014, 10:20:28 PM »
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How much do you lower your throttle while landing.
Is this first time flying a quad ?
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« Reply #34 on: December 08, 2014, 11:52:04 PM »
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No, not first time.Flew many mini and micro quads.Also practised in simulator.I go very gentle on throttle.I feel that the quad reacts late to my input.Pi values are quite good and low.At certain altitude while landing, It makes more noise and comes down quickly.
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« Reply #35 on: December 09, 2014, 12:27:46 AM »
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Just try with default PI values by resetting the board.
And then tune PI again.
do you have expo or throttle curve set in Tx ?
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