©2012 DJI Innovations. All Rights Reserved. 3
Travel Calibration
If the Landing Gear you got has been installed with the servos, please skip this step. Otherwise, calibrate the
system using the following procedure.
1. For safety reasons, please keep your hands away from any link mechanism to avoid injury.
2. Make sure the [R], [L] and [IN] connections are correct and firmly connected.
3. Hand the Landing Gear in the air during calibration, as the landing gear will move.
4. Keep pressing the SET button using a small tool and power on. You can see the LED flashes YELLOW
quickly, and then press the SET button once again. The system begins auto calibration with the
indication of the LED flashing YELLOW slowly. DO NOT obstruct any moving part during auto
calibration.
5. First the left-part is calibrated, the left link mechanism first moves up then moves down automatically.
Then the right-part is calibrated, the right link mechanism first moves up then moves down automatically.
6. After calibration, both left and right parts are in the [Lower] position, and the LED is on solid GREEN.
Then the landing gear will work normally.
Notes:
If the LED is on solid YELLOW when calibrating, then it means that there is something wrong with the
calibration, please re-do the Servo Installation of the Assembly & Connection section, since the servo
arm might be installed with a wrong angle.
Please avoid any obstruction when calibrating. If the landing gear is blocked from moving, please
recalibrate the landing gear by the above steps.
If the [R] and [L] servo cables are reversed, the travel will not be measured correctly. Please connect
correctly and recalibrate the landing gear using the above steps.
If the LED flashes slowly GREEN after power on, please re-calibrate the system using the above steps.
R/C Transmitter (TX) Setting
Select a 2-position switch channel (default setting is OK) on the
TX as the control input of the landing gear, and then make sure
the corresponding port of the receiver is connected to the [IN]
port on the control board.
Fig. 1
Fig. 2
Tips:
If the switch channel on the TX has fail-safe function, set the fail-safe value to [Lower] position, so that
the landing gear will be in [Lower] status when the receiver enters fail-safe, to land the aircraft safely.
To avoid false switch triggering, you can use the slide lever or other trim as the landing gear’s control
switch.
Retracted：Toggle the switch
to this position to retract the
landing gear (Fig.1)
Lower：Toggle the switch to
this position to lower the
Landing Gear (Fig. 2)
©2012 DJI Innovations. All Rights Reserved. 4
Usage
The landing gear can be used by following the steps below after assembly & connection.
1. Make sure the transmitter & receiver batteries are fully charged.
2. Toggle the switch to the [Lower] position, and then turn on the transmitter.
3. Make sure the [R], [L] and [IN] connections are correct and firmly connected.
4. Make sure the Landing Gear is at the [Lower] position, and then power on the system. If the green
LED is on solid, then this is a normal start. If the LED will flash GREEN slowly, please re-calibrate the
system according to the procedure of Travel Calibration.
5. Make sure to toggle the switch to the [Retracted] position only AFTER you takeoff the aircraft.
6. When the aircraft is landing, please toggle the switch to the [Lower] position for a safe landing.
Tips
The system will turn off the servo power temporarily within 3 seconds after the landing gear has
reached the target position.
When powering on the system, if the TX switch is in the [Retracted] position, which is the unsafe signal
for the landing gear, the LED will quickly flash RED. Please toggle the switch to the [Lower] position.
If there is an abnormal signal or no signal input into the [IN] port the LED will slowly flash RED. Please
check the receiver and the connections.
If the power consumption of the servos is too large when in use, the LED will be on solid RED. If this
status lasts more than 4 seconds, the landing gear will lower and the LED will flash GREEN slowly.
Please re-calibrate the system.
LED Indicator
System works normally
Hasn’t been calibrated
Need re-calibration
Wrong calibration
Enter the calibration mode
System is calibrating
Motor stall
Input signal is unsafe when power on the TX
Input signal is abnormal
Specifications
Parameter Range Parameter Range
Working Voltage 3S~6S (LiPo) Input Signal PWM (High-Pulse Width 800us~2200us)
Working Current Max 1A@6S Output Signal PWM(Neutral Position is 1520us) in 90Hz
Working Temperature -20~70
o
C Output Voltage 6V
Total Weight 875g Servo Travel 150
o
(Minimum120
o
)
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