6
、
Switch of AVCS Mode
8.Setting Process
9
、
First Flight.
10
、
Troubleshooting
◆
Move knobs of AIL,ELE and RUD on the gyro,to adjust the gain of
AIL,ELE and RUD to the middle position,then pick up the aircraft
around the pitch axis, the roll axis and the yaw axis to check if the
reacting amount of rudder(control surface) is appropriate.
Gyro Gain Correction Diagram
SW is the switch to change mode of AVCS for flight.If use 2-section
switch,it just can change between AVCS and Normal mode.For
3-section switch,apart from the AVCS and Normal mode,it has an
additional Gyro Off Mode,refer to the following table:
Flight Mode
Range of
switch
Signal Pulse
Width
LED Status
NonLocking
Less
1320US
Blue on
Gyro Off
Middle
1520+/-200US
Off
Locking
（
AVCS
）
More
1720
Red on
7.Stick Centering Calibration
First,to get the best performance,centering function is
required.Make the stick in your transmitter to be centered and
then enter into Setting Mode to calibrate.When you use the
3G-A unit for the first time,or change your transmitter,the
calibration of stick center is required,after centering,all servos
will be centered automatically.The center of aileron,elevator
and rudder could be obtained by adjusting the linkage rods.The
function of sub-trim in your transmitter could not be used.
1 Turn on transmitter,set
the trims of channel
ELE,AIL and RUD to
zero,dial S1,S2 and S3
downwardly(OFF),
then,connect the 3G-A
with power supply.
2.Stick Center
calibration
a
、
Red and Blue LED
will flash one time
simultaneously: enter
into center calibration
b
、
Waiting for 1
second.
c
、
Blue LED flashes
rapidly for 1
second,calibration is in
process
d
、
One second
later,blue LED will give
a rapid flash,calibration
finished with success.
3
、
Quit Setting Mode
Stick center calibration
finished or the setting of
Nor/Rev for gyro
finished,
，
unplug the
power supply and quit
setting mode.
Waiting for 5 seconds
4
、
Nor/Rev Setting of Gyro.
a.)Red and Blue LED will flash 2 times
simultaneously: enter into Normal and Reverse
Setting for Gyro
b.)Waiting for 1 second and the LED status will
enter into circulatory flash,the color of LED
represent the direction of gyro
compensation,blue for Normal and Red for
reverse.
c.) Blue or RED LED will falsh 1time per second
for 5 times in total.,now you can move the
rudder stick to adjust the compensation
direction of aileron.
d) Blue or Red LED will flash 2times per
second for 5 times in total,now you can
move the rudder stick to adjust the
compensation direction of elevator .
e)Blue LED(or Red
）
will flash 3 times per
second for 5 times in total,then move the
rudder stick to set the compensation
direction of rudder.
5Direction of Gyro Calibration
a)During the process of flash,move the
rudder stick to left or right to switch the
direction of gyro calibration
Nor
（
Blue flash
）
Rev
（
Red Flash
），
or
Rev(Red Flash)
Nor(Blue Flash)
b)When moving the rudder stick,LED keeps
rapid flashing until it returns to the center.
For the first flight,please check if the direction of gyro
compensation,direction of control by stick are correct,and set the
gain to a small volume,and after times of flight test,then set it to
a appropriate volume,in order to get the most excellent flight
performance.
◆
Airplane swings regular,rapid and alternately
Decrease the gyro gain.
◆
Airplane swings irregularly
。
Check if the vibration of engine with airframe is too much,reduce
the vibration ,use soft double-sided foam adhesive to install the
gyro.
。
◆
Airplane rotates irregularly,side tumbling or overturning after
taking off.
Chek if the direction of movement of AIL,ELE and RUD are
correct. Move sticks of Aileron,Elevator and Rudder separately to
check if the direction of movement of rudder(control surface) are
correct.
◆
Rotate on a direction slowly and continually.
Check if the installation of rudder(control surface) stick is
level,adjust the center of servo.
1
2
3
4
5
6
1.Rotating the plane around pitch axis,check the correction of gain
for elevator as showing in the diagram 1 and 2.
2.Rotating the plane around the roll axis,check the correction of gain
for aileron as showing in the diagram 3 and 4.
3.Rotating the plane around the yaw axis,check the correction of gain
for rudder as showing in the diagram 5 and 6.
ATTENTION
：
1.Checking that the mixing of flying wing or v-tail has been
disabled within your transmitter as 3G-A has already had these
functions in.
2.3G-A has to re-learn the center position after making a trim
or subtrim change within the transmitter,or the servos may move
to the full left or full right when switching to AVCS mode.To do
this,please quickly flip the flight mode switch two or three times
between Normal mode and AVCS mode per second.
