Lefeirc SN-L Manuale utente

SN-L user manual

SN-L

FixedWingFLightController + Pixel OSD

Ver 2.5

FW 5.8+

LeFeiRC

2019/1/10

SN-L user manual

WARING：

Please strictly observe the relevant national laws and regulations for safe flight. We do not advocate

flying high, flying far, experience the fun of the model airplane in a fully safe environment, and create a

good environment for model airplane sports! Before using the flight control, you must fully understand

the various safety details and deeply understand that the flight is risky. It is impossible to be completely

reliable on the equipment and any electronic products on the aircraft. You should use the Sinan (SN_L)

fixed-wing flight control to evaluate the product and use the system according to relevant regulations.

The system provider does not use the product for any use. Responsible for direct or indirect losses and

consequences.

i. 目录

1. INTERFACE ................................................................................................................................................... 3

2. FLIGHT MODE ............................................................................................................................................. 3

3. SWITCH FLGHT MODE ............................................................................................................................. 4

4. INSTALLATION ............................................................................................................................................ 4

5. OSD................................................................................................................................................................. 5

6. REMOTE CONTROLLER ............................................................................................................................ 5

7. PRE-FLIGHT CHECK................................................................................................................................... 6

8. FLIGHT AND CONTROL ........................................................................................................................... 7

9. OSD ACTION ............................................................................................................................................... 7

10. Firmware upgrade ................................................................................................................................. 8

SN-L user manual

1. INTERFACE

RSSI Connect to receiver RSSI channel

PPM Connect to SBUS/PPM

A1 Extend other functional interfaces

A2 Extend other functional interfaces

AIL Aileron servo interface

ELE Elevator servo interface / Airspeed interface

THR ESC interface

RUD RUD servo interface

GPS Connect to GPS

PMU Power/Camera/VTX/Current, all in one interface

 CONNECT AIR-SPEED METER

Step1: set AUX1/AUX2 channel as ELE function

Step2: connect ELE servo to AUX1/AUX2 channel

Step3: connect airspeed meter to ELE channel

Step4: power on again

If you should change ELE servo direction, you should set AUX1/AUX2 channel direction

 POWER SUPPLY

All above interfaces are powered by the external 5v BEC module, and the flight controller does not output 5V to supply power

to these interfaces.

2. FLIGHT MODE

MANUAL Remote control directly controls the aircraft

STAB Auto level

HORIZON ACRO mode + STAB mode

RTH Return to home

HOVER Altitude hold and cycle。

ALTHOLD Aircraft hold altitude and flight route(with GPS)

GUID Keep on the route

ACRO Gyro mode

SUB-MODE Switch mode to slave mode

 RTH MODE

When the return altitude is higher than the set height, for example, returning at a height of 150m. If the set return altitude

is 120m, the aircraft will return at a height of 150m, and then decrease the altitude to 120m when approaching the home

position. If the return altitude is less than 30m, the aircraft will climb to 30m before turning. The RC cannot control the aircraft

during the RTH mode, but the throttle can be raised by the throttle stick.

In auto cruise mode, the throttle is automatically calculated based on the speed (airspeed or ground speed). In the case of

a downwind or a large wind, the throttle can be raised by the remote control to prevent the aircraft from stalling. for example

if auto throttle is 45%, but the RC throttle is 50%, then FC output 50% throttle.

 GEO FENCE

When the fence is turned on, the RTH mode is triggered once the height or distance exceeds the fence radius. The way to

SN-L user manual

cancel the RTH mode is to switch the mode switch once. If you do not cancel, you can dial the mode switch several times.

3. SWITCH FLGHT MODE

SN_L sets the RC channel 5 as the main mode switch, so the 5th channel of the RC must be set to a three-segment switch; the

SUB-MODE switch can be selected or not used when the remote controller is calibrated.

Example:

Position Mode switch SUB-Mode Switch

1 STAB RTH

2 SUB-MODE HOVER

3 ALTHOLD MANUAL

4. INSTALLATION

① PMU MODULE

 Before power on FC, please check everything is correct.

install direction：

0° Arrow point to head

180° Arrow point to rear

90° Arrow point to Left side of the nose

270° Arrow point to right side of the nose

The FC installation should try to avoid the vibration source and keep away from the motor; try to install it near the center of

gravity. Be sure to recalibrate the level after changing the installation direction

② HOW TO CONNECT SERVO

Interface

Type

AIL ELE THR RUD AUX1 AUX2

Wing Servo1 Servo2 ESC ALL ALL

T tail AIL servo ELE servo

ESC RUD servo

ALL ALL

V tail AIL servo ELE servo1 ESC ELE servo1

ALL ALL

SN-L user manual

③ CORRECT CONTROL SURFACES MOVEMENT

5. OSD

Speed unit’ Km/h’ or ‘Mile/h’; Distance unit ‘m’ or ’Ft’. flight summary after landing

6. REMOTE CONTROLLER

 CALIBRATE RC

Make sure the 5th channel as mode switch is a three-segment switch.

When a new RC is connected to the FC, it will pop up a calibration screen:

Page1：reset all channels，flip mode switch enter next step Clear all offsets, sticks is homed, and the RC does not set the range limit

Page2：throttle Up，flip mode switch enter next step Get throttle MAX value

Page3：throttle Down，flip mode switch enter next step Get throttle MIN value

Page4：Keep the AIL stick to the Left, flip mode switch enter next step Get AIL channel MIN value

Page5：Keep the ELE stick to the Down, flip mode switch enter next step

Get ELE channel MAX value

Page6：Keep the RUD stick to the Left, flip mode switch enter next step

Get RUD channel MIN value

Page7：flip subMode switch，flip mode switch enter next step Detect subMode switch

 ENTER RC CALIBRATE：

① When you can’t enter RC calibrate menu for some reason； follow steps like this:

Power on FC -> make RC sticks move to the side-> wait until RC calibrate menu display

② Before OSD initialization is complete, don’t move sticks, otherwise you would enter RC calibrate menu again

③ After calibrate，don‘t change RC channel offset

 FAIL-SAFE

PPM receiver FC can’t recognize whether the RC is out of control, need to be set in advance.

SBUS receiver can automatically identify if it is out of control，move stick to cancel failsafe mode.

SN-L user manual

ENTER OSD MENU

FAILSAFE MODE

GPS connect, satellites>6 GPS disconnect/GPS lose signal

HOLD Hold current mode Hold current mode

RTH Return to home Switch to stab mode, close throttle, Circling down①

STAB Switch to stab mode, close throttle, Circling

down

Switch to stab mode, close throttle, Circling down

①The AIL is 10 degrees to the left, the ELE is 15 degrees down, and the throttle is closed.

 RSSI

① Support independent RSSI and RSSI signal channels in SBUS or PPM signals; can be selected by OSD menu.

② The independent RSSI automatically recognizes the RSSI signal type, PWM or AD type; the RSSI signal of some models of

receivers may cause the OSD picture to flicker due to the RSSI modulation into a high frequency pulse signal.

③ FC does not return to home based on the RSSI signal value.

④ If connect a SBUS receiver, you Set RSSI channel to 18,

, FC will auto

calculate RSSI according to SBUS signal packet loss rate.

 CALIBRATE ESC

Step1: switch to manual mode.

Step2: unplug the ESC signal line and wait for ESC to make a di---di---di--- sound.

Step3: move the throttle stick to the max position, then plug in the ESC signal line.

Stpe4: hear di—di—, then move the throttle stick to the lowest to complete the calibration.

 ARM&DISARM

Satellites <=6 >6

GPS connect DISARM ARM

GPS disconnect ARM ARM

*If flight mode is manual mode, you can control the throttle in any situation

7. PRE-FLIGHT CHECK

 CHECK ACCEL HEALTH

① The vibration is in good condition. When the plane is flying flat, the vibration point is scattered within the two warning lines.

② The vibration is large, and most of the vibration points fall outside the warning line, which easily leads to the FC

can’t calculate the correct attitude

SN-L user manual

 CALIBRATE LEVEL

① Horizontal calibration is required after changing the mounting direction.

② If you have not calibrated for a long time or the temperature difference has changed too much, you need to

recalibrate.

③ Ensure that the aircraft is level and static during horizontal calibration.

 SENSITIVITY ADJUSTMENT

①

: The larger the value, the faster

the reaction speed and the excessive jitter.

②

<ADVANCE FUNCTION>-<STAB GAIN>-<FEED FORWARD GAIN>:

The larger the value, the faster the

response joystick will be, and the jitter will be exceeded.

③ Adjustment steps:

Step1: set

, normally reduce feed forward gain to 40

Step2: set the

. You can fly by default, then increase or decrease the

sensitivity according to the state of flight.

④ Speed PID Factor

PRINCIPLE: the faster the speed, the smaller the rudder surface sensitivity should be. The greater the value, the

greater the speed involved in PID control.

EXAMPLE: when speed of the aircraft is very fast, the aircraft begins to shake; then you can increase

<SPEED PID

FACTOR>

value.

8. FLIGHT AND CONTROL

 AUTO TAKEOFF

① ALT-Hold mode：Push the throttle to enough power and the aircraft will automatically climb to a height of 20m.

② RTH mode:

1.1

more than zero, push throttle stick away from the zero position, give plain a speed until motor start.

1.2

equal zero, push throttle stick away from the zero position, shake the aircraft, until motor start.

Aircraft will auto climb at 30m.

 SPEED CONTROL

① Disconnect Airspeed

Speed is controlled by the ground speed, cruising speed set in

② Connect Airspeed

Speed is determined by airspeed, Preventing the wind from flying in the head, causing the ground speed to be too small,

please set

<MINIMUM GROUND SPEED>.

9. OSD ACTION

* in flight can’t enter the setup menu

Enter OSD menu Flip mode switch twice

AIL move left Exit the current menu or exit the selected mode

AIL move right Enter menu or select setting item

ELE move up or down Change item index or select parameter

SN-L user manual

10. Firmware upgrade

 Download upgrade software and drivers and install：install “CP210x USB to UART Bridge” driver.

https://github.com/HelloLeFei/SN_L/releases

www.lefeirc.com

 Connect via USB：Select correct com ID.

 Upgrade SN_L

Step1: power off FC at first

Step2: Select “SN_L”

Step3: load firmware and flash,

Step4: Before the end of the countdown, power on FC

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