The imbalance in the motor output signals

ArduCopter Copter 4.5
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1

Hello,

I am developing an EDF quadcopter. Currently, I am experiencing an imbalance in the output signals of the motors, with CCW (1,2) being lower and CW (3,4) being higher. As a result, the CW motors are overheating, and the aircraft occasionally rotates to the right. I would like to resolve this issue, so could you please provide some advice?
Thank you in advance.

Log download link

2

Without looking at your log, two possible reasons, but not limited to, 1. blades are not at the same plane, meaning misaligned motor mount. 2. Non-self-lock propeller nut losing slowly.