Quadrocopter-Arduino due

Other Hardware Motors, Mechanics, Power and CNC
1

Hi guys,

a first I would like apologize for my low English.

I would like ask you for advice. I construct quadrocopter with arduino Due. I have control algorithm, which works good virtual, but it does not work in real.

  1. Motor - OK

  2. Motor - it does not work. ESC is only beeping whole time (beep, beep, beep, beep ....)

  3. Motor - it works but speed is very higher than 1. and 4. motor although from arduino come the same "microseconds" = i use servo library for control ESCs.

  4. Motor - OK

So, the all ESCs was calibrated on 1000 microseconds (low border) to 2000 microseconds (high border).
So I can not understand why 1. and 4. motor have proper speed but 3. motor does not have same speed (very higher) and 2. motor does not working although 2. ESC was calibrated properly -> every ESC had same sound during calibration - same sounds which are described in manual = every ESCs was calibrated right according to the manual.
And the motors just do not have same speed at same signal from arduino.

So please help , I am lost, i will be thankful for every useful advice.