Multiwii Quad Rotor take off help please...

[weebly]

I'm trying to fly a quad rotor using multiwii board. But It can't be still flied due to unstable takeoff.

As usual two motors are rotating in high speeds(m1,m3) and other two rotate in low speeds(m2,m4). But low speed motors(m2,m4) do not work vary their speeds at same time.

When I decrease pitch m2 keep its speed constant in any position while m4 tries to be stable. When I increase pitch, m2 varies its speed in different positions while m4 remains constant.

When I'm increasing throttle speed to take off (pitch=0) m1,m2,m3 motors vary its speeds and and try to remain stability. But m4 motor is not varying its speed and remain constant. Therefore rotor becomes unstable and difficult to take off.

What should I do?

[scrat]

You should not double post.