I made this H quad a while ago and tuned it so that it is flyable. but it yaws to the right after take off, don't know why ....maybe i couldn't figure out the yaw PI settings well enough.

and one more thing the throttle goes up and down on its own ... and that scares the crap out of me
esc are flashed with simonk firmaware (HK f-30 light blue ones)

Please help me out with this problem


motors: Fc 28-22 1200kv
esc: HK F-30 (simonk)
prop: 10/4.5
battery: turnigy 2200mah 25-35c
board: kk2
frame: HD thermo and plywood
total flying weight is 700grams approx.

I think vibration may be the problem. Did you balance your props and motors? After that check your battery. You should check your motor bearings too.

Plus the controller board seems misaligned.

i did balance the prop and motors but still had some vibrations.
one thing i did notice that the bell of one motor had slight play to it and it rattles at a certain rpm.
how can i fix the motors??

actually the arms are at a certain angle, that's why the board seems to be off set.

Quote from: lastRites on April 26, 2013, 11:56:21 PM
Plus the controller board seems misaligned.

+1 to that... make sure you align the board properly. There should be an arrow mark on the board to do so. Proper balancing of the props will help you with the stability too. Do follow their instructions line by line. Throttle calib for all escs should be done for proper spooling up.

i have tried everything possible ...now i am concentrating on how to reduce vibrations even further..

Have you checked the CG? It should be below the flight controller.

Aditya, your board SHOULD be in the centre, as lastRites suggested...
FYI,
Here is my H-Quad build......
http://www.rcindia.org/multirotors/h-quad-build-(jit-for-the-rci-sweep!)/
Cheers!

i am pretty sure that ill have to play with the PI settings

Does your quad undergo fast oscillations in flight OR does it not react to control inputs fast? These are the only two problems that you can rectify by PID parameter tuning. So I am pretty sure that is not where your problem lies.

Hello Guys
I have made a H Quad and I am facing a problem. My all motors rotate in same direction. Can anyone please tell me which motors should rotate in which direction and how to solve the problem? Please help me.

Help please 

do you know how to change the spinning direction of the motors by interchanging the 1st and 3rd wire between the esc and motor?

can you post some pics of your quad? m curious!!

So we have to interchange the wires. But I want to know which motor should spin in which direction.

which board are you using ??

maybe this video will help you.

motor layout for an X quad or H quad is the same.
skip first 4 minutes of the above video

Thanks for the video. I am using  V3 HK board flashed with V4.7.

So M1 and M3 should spin clockwise and M2 and M4 should spin anti-clockwise.

maybe your board requires a different motor direction layout....but i think this layout is the one for your board too.. its universal i think ...but again look for the manual if you can to be on the saafe side

Quote from: ved on May 08, 2013, 01:05:35 PM
So M1 and M3 should spin clockwise and M2 and M4 should spin anti-clockwise.

correct

Is there a video of what happens when all motors on quad are spinning in same direction? Just because I wondered what would happen if they do  

So LEFT LAND props will go on M2 and M4 and RIGHT HAND spinning props will go on M! and M3.

  nothing is more scary than 4 spinning propellers coming after you .... ask me how i know