Please sir can you help me with the parameter of your quadcopter if available. I couldn't figure out why all the motors are not spinning the same speed when I increase throttle. it keep flipping over but when the throttle speed is at 70 it lift up a little and maintain the same position but when I increase the throttle it flip over
skylab , have you performed these steps as described at
http://ardupilot.org/copter/docs/connect-escs-and-motors.html ?
Testing motor spin directions
If you have completed the Radio and ESC calibration, you can check that your motors are spinning in the correction direction:
Make sure there are no propellers on your copter!
Turn transmitter on and ensure the flight mode switch is set to Stabilize.
Connect battery.
Arm copter by holding the throttle down and rudder right for five seconds.
If it fails to Arm with the throttle down and to the right and the motors will not spin, it has probably failed the Pre-Arm Safety Check.
- Pre-Arm safety check failure is also indicated by the red arming light double flashing and then repeating.
- If the Pre-Arm check fails go to the Prearm Safety Check Page and correct the problem or disable the check before continuing.
When you can Arm successfully, apply a small amount of throttle, and observe and note spin direction of each motor. They should match directions shown in the images above for the frame you’ve chosen.
Reverse any motor spinning in the wrong direction.
Tip
Motor Direction is reversed simply by interchanging two of the three ESC to motor power leads.
Checking the motor numbering with the Mission Planner Motor test
An alternative way to check that the motors have been hooked up correctly is to use the “Motors” test in the Mission Planner Initial Setup menu.
Mission Planner: Motor Test
When connected to the vehicle via MAVLink, you can click on the green buttons shown above and the corresponding motor should spin for five seconds. Letters correspond to motor numbers as shown in the example below.
- Take off your props first!
- If no motors turn, raise the “Throttle %” to 10% and try again. If that doesn’t work, try 15%
The first motor to spin will be the one located directly forward in the case of + configuration, or the first motor to the right of straight forward in the case of X configuration. The motor test will then proceed in a clockwise rotation.
In the case of X8, it will spin the top front-right motor first, then the bottom front-right, and proceed around with the same pattern.
OctoV will spin the front-right motor first, and then again, proceed clock-wise until reaching the front left motor.
