Futaba G501 - Manual (Page 3)

There are two methods of adjusting the sensitivity.
(1) adjustment at the gyro (2) adjustment from the transmitter
(1)Adjustment at the gyro
The sensitivity can be arbitrarily set over the 0 to 100%
range to correspond to the position of the transmitter sensi-
tivity switch with the control box sensitivity high side and low
side trimmers.
(Hovering sensitivity)
When the CH5 (sensitivity
switching) switch is in the front
position, the sensitivity can be
adjusted from 0 to 100% with the
control box high side trimmer.
• Setting standard:
Approximately 75°
CH5
switch
Front
position
High
side
(Climbing sensitivity)
When the CH5 (sensitivity
switching) switch is in the rear
position, the sensitivity can be
adjusted from 0 to 100% with the
control box low side trimmer.
•Setting standard:
Approximately 45%
CH5
switch
Rear
position
Control box
Low
side
(2)Adjustment from the transmitter
When ATV function is used
(When reverse function is normal)
(Sensitivity adjustment range setting)
After deciding the upper and
lower limits of the sensitivity
adjustment range with the
control box high side and tow
side trimmers, adjust the
sensitivity using the transmitter
CH5 ATV function.
'Setting standard:
Upper limit Approximately 80%
Lower limit Approximately 40% Setting
range
+100% +30%+30% +100%
ATV function rate
Lower limit Upper limit
Control box
(Hovering sensitivity)
Adjust the CH5 switch Iront position ATV rate and adjust
the sensitivity high side.
The higher the ATV value, the higher the sensitivity.
• Setting standard:
ATV rate: Approximately 75%
Front
position
CH5
switch
(Climbing sensitivity)
Adjust the CH5 switch rear side ATV rate and adjust the
sensitivity low side.
The higher the ATV value, the lower the sensitivity.
• Setting standard:
ATV rate: Approximately 75%
CH5
switch
Rear
position
*With a PCM1024Z Series transmitter, the sensitivity can be
adjusted from 0 to 100% using the AFR function.
When using PCM1024Z Series transmitter program
mable mixing can be used.
1. First, set the sensitivity adjustment range to maximum at
the control box.
(Sensitivity adjustment
range setting)
Set the control box high side and low
side trimmers as shown at the right so
that the sensitivity can be adjusted
from 0 to 100% from the transmitter.
Low side
Fully
counter-
clockwise
(minimum)
High side
Fully
clockwise
(maximum)
Control box
2. Next, set the transmitter as follows for each flight condi-
tion.
Programmable mixing (PMIX) setting
(1) Set PMIX to one circuit.
(2) Select "OFS" (offset) type.
(3) Make CH5 (GYR) the slave channel.
In this state, the gyro sensitivity for each flight condi-
tion (hovering, forward flight, etc.) can be arbitrarily set
by setting the PMIX function rate.
- 3 -
The following shows the relation between mixing rate
and gyro sensitivity.
PMIX offset rate and sensitivity
PMIX offset rate
Gyro sensitivity
(4) At this time, release the CH5 (GYR) switch by soft-
ware as follows:
Function control(FNC) setting
Set the CH5 (GYR) switch to "NUL" (not used
state).
(5) Also set the CH5 (GYR) ATV function to the fol-
lowing value:
ATV function (ATV) setting
Set the CH5 (GYR) ATV function to 90% in both
directions.
The following describes the adjustment procedure when the
FP-G501 is used with a helicopter. Make these adjustments af-
ter all the connections are complete.
(All values are for when the FP-S9203 servo was used.)
Rudder linkage adjustment
Place the transmitter into the neutral state and adjust the
rod as described below so that the neutral position is near
the center.
1. Transmitter steering angle setting
Set the ATV function rudder left and right steering angles to
maximum.
2. Set the transmitter to the neutral state (including mixing).
-Set rudder subtrim to 0%.
-Set rudder trim to the center. —
-Set the throttle stick to the center. (When revolution mixing
is on.)
3. Turn on the power.
In this state, turn on the power in transmitter and receiver
order.
At this time, do not move the aircraft for about
four or five seconds.
4. Check the rudder direction.
Operate the transmitter stick and check the direction of the
rudders. If the direction is incorrect, reverse it.
5. Servo horn mounting
Change the servo horn spline so that the horn is perpen-
dicular to the rod and servo.
"Make the length of the servo horn as
close to 16.5mm as possible. This may be
impossible, depending on the aircraft. In
this case, set the servo horn length to
maximum.
(Expansion horn: Futaba splined horn "A")
6. Gyro output polarity check
When the nose of the aircraft swings back and forth, check
the direction of rudder. If reversed, switch it with the gyro
control amp polarity switch.
If the aircraft is flown at reverse polarity, it may
swing severely in a fixed direction and this is
dangerous. Be sure that the gyro output polarity
is correct.
7. Sensitivity selector switch direction check
Set the control box high side trimmer for maximum sensitiv-
ity (fully clockwise) and the low side trimmer for minimum
sensitivity (fully counterclockwise) and check that the sensi-
tivity switch high side (CH5 switch front position) and low
side (CH5 switch rear position) relationship is correct.