Quad motors 2 & 3 spinning faster and tip over on take-off

ArduCopter Copter 3.2
1

Pixhawk 2.4.6 with Arducopter 3.2.1 loaded with Mission Planner

The two motors on the left is spinning faster than the two on the right resulting in the quadcopter flipping over to the right on take-off.
I have done the following:

  1. Tested all motors and ESC’s
  2. Swopped out the motors and ESC’s
  3. Checked motor layout (top right = 1, bottom right = 4, bottom left = 2, top left = 3)
  4. Checked motors are spinning in the correct direction
  5. Checked props are correct
  6. Reloaded Arducopter
  7. Calibrated ESC’s (one by one and all together with Pixhawk)
  8. Calibrated the Radio
  9. Calibrated compass and accelerometer
  10. Did the motor test
  11. Check that the quadcopter is level on Mission planner
  12. I have two Pixhawk both doing the same (they are brand new)
  13. Using it with a s.bus receiver
    I have attached the log file can anyone help me with this problem. (cannot file lager than 2mb)
2

@Rudy101,
Please provide tlogs and/or dataflash logs to help troubleshoot your issue.
Regards,
TCIII GM

3

Thanks I zipped the log and attached

4

You are using RCMAP which does not work correctly with this firmware.
You might try swapping RC1_TRIM=1087 with RC3_TRIM=1537.
The low trim value for RC1_TRIM causes it to roll right.

Mike

5

Thanks Mike - (perfect answer, working 100%)

I decided to sub-trim my TX until mid-stick was 1500 - then changed RC3_TRIM to 1087 (low stick) and RC1_TRIM, RC2_TRIM & RC4_TRIM to 1500 and it is perfect :smiley: