I was getting some problems with the YAW axis. Today a realize that the motor get a little hard to spin when I connect the cable on it or close the the circuit with the screwdriver. The roll and pitch axis motors does not behave like that when the circuit is close. It's the YAW motor defective?
Funny. I mean, it gets really hard to turn when the servo cable is connected with no power source on the Alexmos. I already measure the impedance from the Yaw motor and seams to be ok; and it's the only motor to behave like that. Roll and Pitch motors spin with no diference when the servo cable is connected. :/