Ledi Flight Control Servo Setting Tutorial | Teach You Step By Step From Wiring To Mixing Control

When playing model airplanes or doing robot projects, the most troublesome thing is that the flight control and theservodon't cooperate. Especially friends who are new to LEDi Flight Control, often don’t know where to start when faced with a bunch of interfaces and dazzling software interfaces. In fact, as long as you know the ropes, setting it up is much easier than you think.

How to connect theservoto Ledi flight control

The first thing you should do when you get the flight control is don’t rush to power it on. First check what kind of interface yourservohas. Usually we use three-wire servos. Red is the positive pole, brown or black is the negative pole, and orange or yellow is the signal wire. On the Ledi flight control motherboard, you will find a row of pins marked S1, S2, and S3. The S here refers to the signal pin. ️ The operation is very simple: align the signal line of the servo with the S row and plug it in. Just don’t connect the positive and negative poles reversely. If you are using a high-power servo, it is recommended to draw power directly from the ESC or a separate BEC. Do not squeeze it all on the flight control, otherwise the voltage will be unstable and it will easily restart.

What should I do if I can’t find the servo channel in the flight control software?

Connecting the cables is only the first step. What’s really frustrating is that after connecting to the computer, I can’t find the corresponding channel in the flight control ground station. Don't panic, this is because the default output mode of LED flight control is not turned on. You need to enter the "Settings" page and find the "Output" or "Mixing" option. Here is a little trick. First change the "Multi-axis Mode" to "Custom" in the basic settings, so that the originally occupied motor channels can be released for use by the servo. Remember to click "Write" or "Save" after each modification, otherwise the settings will not take effect. Many novices get stuck in this step and go back and forth.

How to assign an independent switch to the servo

Sometimes we hope that the servo can be controlled with the help of a lever or knob on the remote control, such as controlling the pitching action of the gimbal, or controlling the retraction and retraction of the landing gear. This operation method is called "channel mapping" in Ledi Flight Control.

First, you need to confirm which channel is idle on the remote control, such as channel 5 or channel 6. Then, in the "Channel" setting interface of the flight control ground station, find the servo interface you plan to control, such as S1. Then select the corresponding remote control channel number in the drop-down menu next to it. ️ In short, it is like building blocks, connecting the "action" of the remote control with the "interface" of the flight control. When the joystick is pushed, the servo will move accordingly.

How to adjust the steering gear if it has too much stroke and gets stuck?

After installing the servo and turning on the power, I found that it rotated extremely hard and even rattled and was about to get stuck. This was because the stroke of the servo exceeded the limit of the mechanical structure. Ledi flight control provides a very considerate limit function. In the mixing setting interface, find the "maximum" and "minimum" values of the corresponding servo. The defaults are usually 100 and -100. You can try changing it to 80 and -80 and observe whether the rotation angle of the servo arm is within the safe range. This is like drawing two red lines for the servo. No matter how much you push the rocker, it will not cross the line, which can effectively protect the expensive servo and your mechanical structure.

How to set up two servos to move synchronously

When building a twin-engine aircraft or a complex robotic arm, it is often necessary for two servos to move in the same direction and at the same speed. At this time, you need to use the "mixing control" function of the flight controller. Taking Radix Flight Control as an example, under the "Mixing" menu, select the output channel you want to set, and then click "Add" mixing rule. In the rules, set the source channel to your stick or switch, then set the weight to the same value. If you want a servo to move in the opposite direction, just set the weight to a negative number. The whole process is a bit like setting up a mathematical formula to add multiple input signals to an output through calculation.

What went wrong when the servo vibrates out of control?

After completing the settings for the power-on test, the most fearful thing is that the servo will vibrate on its own, or there will be no response at all. This situation is usually caused by three reasons: First, insufficient power supply, especially when multiple servos are running at the same time, it is necessary to check whether the current of the battery and BEC can meet the demand; second, signal interference, it is necessary to check whether the servo wire and the power wire are entangled with each other. At the same time, it is best to keep them separated as much as possible; thirdly, the frequency does not match. The LED flight control outputs a standard PWM signal of 50Hz. If you are using a digital servo, there is no problem with this. However, if it is an old analog servo, be careful not to increase the refresh rate. It is recommended to disassemble the servo and test it separately to rule out mechanical jamming, and then check the electrical connections step by step.

When the servo vibrates on its own or has no response, after eliminating the mechanical jamming problem, it is necessary to start troubleshooting from the electrical aspect. First check the power supply situation. Multiple servos working at the same time are prone to insufficient power supply, so check whether the battery and BEC current are sufficient. Then pay attention to signal interference, check whether the servo cable and power cable are tangled, and try to separate the cables to avoid interference. Finally, pay attention to frequency matching. Ledi flight control outputs a 50Hz standard PWM signal. Digital servos adapt to this frequency. For old analog servos, be careful not to increase the refresh rate. Through such steps, check the electrical connections step by step, find out the problem and solve the steering gear abnormality.

Seeing this, are you already eager to pick up the LED flight controller and give it a try? Have you ever encountered that metaphysical moment during the setup process where "you're following the tutorial but you're not doing it right"? Welcome to share your experience in the comment area, or talk about what cool functions you want to use the servo to achieve. Only by communicating together can we avoid detours!