Translations:KAVAN Smart PRO Opto ESCs - Instruction manual/149/en
Make sure the propeller blades are removed before activating the constant speed mode. In the General Settings menu, select the controller mode to "Heli/governor" and follow the options below:
- Set the minimum and maximum RPM of the main rotor according to your preference. As soon as you move the throttle stick beyond the idle position, the motor will slowly rev up until it reaches the target RPM. These are calculated by the throttle channel position, where lowered throttle corresponds to "Minimum RPM" and full throttle corresponds to "Maximum RPM".
- Set the Start Acceleration to make the motor start as smoothly as possible. You can set this time up to 60 s. Start-up Acceleration is used when the motor is revving from zero RPM or when the Autorotation Rapid Exit function is deactivated.
- Configure the autorotation retrieval time and autorotation acceleration. The autorotation retrieval function is used to quickly end the autorotation and prevent the model from crashing. In this case, you move the throttle beyond the idle position, "Autorotation Acceleration" is used to rev up the motor until it reaches the desired RPM. The "Autorotation Retrieval" parameter determines the time after motor shutdown when the autorotation rescue function can be activated. When this time is exceeded, the standard start-up time is used.
- Advanced settings: governor gains - (P)roportional and (I)ntegral. You can adjust these gains to fine-tune the governor's response to rapid load changes during flight manoeuvres. Please make the changes only in small increments and verify the resulting behaviour in a short test flight.
- Increase the gain P to remove small speed fluctuations during straight flight, e.g. hovering. If you hear unexpected motor/gear noise (indicating rapid oscillation), reduce P gain by 20%.
- Increase gain I to maintain precise speed during manoeuvres. If the motor speed fluctuates noticeably, reduce the I-gain by 20%.
- In Governor mode, fixed throttle channel endpoints are always used (standard 1.1–1.9 ms) and active braking is also enabled.
The chart on the right shows RPM response vs. throttle position. In this case, default throttle endpoints have been used (1.1–1.9 ms).{{Note|type=info|text=Note: Please make sure the gear ratio and number of motor poles are correctly set in the Motor Setting menu. Also, please verify that the brake is disabled and check the state of the propeller positioning function.