Futaba GYA352 - Manual (Page 2)

G
AIN AND
O
PERATION
M
ODE
S
ETTING
4
The relationship between the travel adjustment functions (ATV,
AFR, END POINT) settings and gyro gain when the gyro gain is
switched using the transmitter switching channel is shown below.
•This figure shows the case
when the gain setting channel
reverse function is set to
Normal. When this function is
set to Reverse, the switch
directions are reversed. (When
Futaba proportional set used)
Gyro OFF setting:
As shown in the figure, when the ATV rate of the gain setting channel is 40% or
less, the gyro gain becomes zero. When you want to turn off the gyro, set to this
range (40% or less).
AVCS mode gain setting:
(in case of "A" side of the Gyro Gain trimmer)
When the ATV_B rate is 40% or more, the gyro operates in the AVCS mode. The
actual gyro gain changes based on the Gyro Gain trimmer setting of the gyro
itself. When the Gyro Gain trimmer is set to 100%, the gyro gain becomes 100%
at 100% ATV rate and becomes 50% at 70% ATV rate. When the Gyro Gain
trimmer is set to 50%, when the ATV rate is 100%, the gyro gain becomes 50%
and when the ATV rate is 70%, the gyro gain becomes 25%.
Normal mode gain setting:
(in case of "A" side of the Gyro Gain trimmer)
When the ATV_A rate is 40% or more, the gyro operates in the Normal mode.
The gyro gain setting can be adjusted the same as in the AVCS mode.
When gain switching from transmitter function not used:
The gyro gain switching connector is not connected to the receiver. In this case,
when Gyro Gain trimmer is set to "A"/"B" side, the gyro operates in the AVCS/
normal mode severally. The gyro gain is set using the Gyro Gain trimmer.
O
PERATION
I
NSTRUCTIONS
5
Mount and adjust the GYA352 as described below.
Gyro Mounting Method
Make a gyro bed so that the bottom of the gyro body is perpendicu-
lar to the direction of the axis (X-axis, Y-axis) to be controlled and
securely install the gyro with the accessory double-sided sponge
tape at a position which vibrations are minimal.
•If this axis changes, the gyro also responds to the changes
of other axis.
•In order to raise attachment intensity, always fix two bottoms
of the gyro body to fuselage with two double-sided sponge
tapes.
Usage Precautions
•When taking off and landing, always switch to the Normal mode.
Taking off and landing in the AVCS mode is dangerous.
•We recommend that you use the rudder control gyro in the
Normal mode. In the AVCS mode, rudder operation is neces-
sary when turning to prevent weathervaneing. Use the gyro in
the Normal mode unless you are an expert in rudder operation.
•When the gyro is ON, the servo operating angle increases.
Increase the travel width of the flight control surfaces so that
they will not strike the linkage even when the servo is operated
to its maximum deflection angle.
•Always use the miniature screwdriver supplied to
operate the GYA352 selector switches and trimmers.
Do not apply excessive force.
Beginner setting
(When there is no vacant receiver channel)
Use this setting method when there is no vacant receiver channel.
Use the GYA352 in the Normal mode only.
Mounting to fuselage and initial setting
1. Gyro mounting
Mount the gyro to the axis you want to control in accordance with "Gyro
Mounting Method".
2. Gyro connection
• Do not connect.
• Connect to the receiver output
of the channel to be controlled.
• Connect to the servo.
Control selector switch (CNT.X)
3. Trimmer setting (Initial)
Set the X-axis and Y-axis Gyro Gain trimmers to about the
N50% position. Do not set them to the A side. Taking off
and landing in the AVCS mode is dangerous.
Set the X-axis and Y-axis Control Gain trimmers to about
the 100% position.
6. Power ON procedure
Turn on the transmitter power, then turn on the receiver and gyro power.
After the gyro power is turned on, initialization is automatically performed
for about three seconds. Never move the aircraft during this period.
During initialization, the gyro monitor LED flashes green.
7. Gyro direction of operation check
Tilt the aircraft about the controlled axis, and check if the gyro applies
rudder in the direction opposite the direction of tilt.
If the rudder moves in the opposite direction switch the gyro direction of
operation selector switch.
Gyro direction of operation
selector switch
•When Gyro Gain trimmer is set to the "N" side, the gyro oper-
ates in the normal mode at both side of the switch directions.
100%
40%
70%
0%
40%
100%
100%
50%
0%
50%
25%
70% 50% 25%
0%
0%
100%
0%
50%
Operation mode
Transmitter
ATV, etc. setting Actual Gyro gain
(Forward or down)
(Back or up)
Gyro
OFF
Gyro
OFF
NORMAL
OFF
A
VCS
When 100% set
(at the "A" side)
When 50% set
(at the "A" side)
(Gyro Gain trimmer position)
Mounting example
•Aileron control
Aileron axis
Elevator axis
•Elevator control
•Rudder control
Rudder axis
•When the gyro is used for aileron control,
always use the X-axis side and set
Control Selector switch to the "AIL" side.
• Connect to the servo.
• Do not connect.
• Connect to the receiver output
of the channel to be controlled.
4. Controlled axis selection
When using the GYA352 to control the ailerons, set the
Control selector switch to the AIL position. When using
the GYA352 to control the elevators or rudder, set the
Control selector switch to the ELV position.
N50% 100%
N50% 100%
Mixing on/off switch (ALV)
5. Operation mode selection
When using the gyro mixng for Elevon/V-tail wing, this switch is set to the
ON position. In this case, do not use the transmitter mixing function for
Elevon/V-tail wing.
In case of Elevon wing, always use the X-axis for the aileron control and
the Y-axis for the elevator control. In case of V-tail wing, always use the
X-axis for the rudder control and the Y-axis for the elevator control. The
linkage of two servos must be symmetrical. If not, the gyro will operate in
the wrong direction and result in a dangerous situation.
When not using the gyro mixng, this switch is set to the OFF position.
DIR.X
DIR.Y