Adjustments
Adjustments
.
Tuning Adjustment
Tuning Adjustment
S.BUS System
S.BUS System
AVCS / NORMAL Modes
AVCS / NORMAL Modes
Setup before a run [ Remote gain use ]
Gain adjustments are carried out with a transmitter.
Follow this procedure when the port 2 of gyro and gain CH of the
receiver are connected. (or with S.BUS connection)
1
Run the car in the gyro off
(gyro gain 0%)
and adjust
the
steering trim
(sub trim).
2
Select the appropriate setting for the steering servo that
you are using. Servo selection switch of GYD470 should
be moved to
SR mode ON
or
OFF
.
*Do not
use a normal digital servo in the SR servo mode (ON). The
servo may be damaged.
Use a normal digital servo
in the
SR servo
mode (OFF)
.
3
Turn on your transmitter's power. Set the gyro
sensitivity to about 70% at the NORMAL or AVCS side
in accordance with the transmitter instruction manual. The
<GAIN CH><AVCS / NORMAL Modes> graph of the next
page is referred to.
*Make the gain tuning adjustment after running the car and noting
the behavior.
4
Receiver ON → The GYD470 requires 3-5 seconds to
initialize when the power is turned on. Do not move
the car and do not move the steering wheel during this
initialization or the gyro may not initialize properly. Once
the initialization process has been completed the steering
servo will move (a little) several times indicating that the
GYD470 is now ready for use. If the neutral has shifted, LED
will blink orange. In that case, it reboots.
5
Move the steering wheel to the left and right and
perform adjustment at the limit trimmer so that the
servo operation is maximum without any bind of the
control linkage or mechanical limits.
Actually drive the vehicle and adjust the gyro sensitivity.
1
Always
re-trim
with the
gyro gain at 0
.
2
In this state turn the
receiver power OFF → ON
. The
neutral position is memorized. Steering trim must not
be performed while the car is running.
The gyro has 2 operating modes:
NORMAL
mode and
AVCS
mode. In the
AVCS
mode,
gyro control is firmer
. The car will
hold heading via the drivers commands.
In
NORMAL
mode the gyro will try to counter steer, but still
allow the car to drift regardless of previous heading.
Because the feel of operation is different, choose your favorite
mode.
3CH (GAIN CH) is set up with reference to the manual of a
transmitter. Neutral position becomes GAIN 0%. It is divided
into AVCS side and NORMAL side. Check using the GYD470's
LED.
When Port 2 is not used for gain, and SBUS/SBUS2 is not
used, the trimmer works as the gain adjustment shown
below.
In case of the right slide
⇒Left steering control
In case of the right slide
⇒Right steering control
AVCS
NORMAL
The gyro will try to get
the car to grip in the
drivers steering
direction.
The gyro will try to
counter steer regardless
of the angle of the car.
0%
-55%
+55%
50%
50%
100%
100%
+110%
-110%
End point rate
Gain
NORMAL
side（LED :
GREEN
）
AVCS
side（LED :
RED
）
Unlike conventional radio control systems, the S.BUS system
sends operating signals from the receiver to a gyro or other
S.BUS compatible device by data communication. The S.BUS
compatible device executes only those parts of this data for
the channels set by itself. For this reason multiple servos can
be connected to the same signal line.
The S.BUS system requires a dedicated S.BUS receiver and
S.BUS servo (gyro, etc.).
If the car is turned to the left
by hand → steering goes out
on the right
＜Limit Trimmer Adjustments＞
It adjusts to the
maximum operation of
linkage.
Steering wheel to
full
D/R (UP side)
Limit trimmer
Adjustments
Gyro sensitivity zero --- LED OFF
AVCS side --- LED red
NORMAL side --- LED green
6
Using the gyro direction switch, adjust the gyro
operating direction so that steering moves all the way
to the right when the car is turned to the left. Be sure to set
gyro operating direction correctly or the car will not run.
[ When remote gain function is off ]
Adjust the gyro sensitivity with the GYD470 trimmer.
If the port 2 of gyro is not connected, remote gain is automatically
set to being inhibited. (S.BUS connection is excluded)
In this case, the limit trimmer is automatically changed to gyro
sensitivity setting trimmer.
(Limit adjustment cannot be performed. A limit is fixed to 50 right
and left.)
1
Select the appropriate setting for the steering servo that
you are using. Servo selection switch of GYD470 should
be moved to
SR mode
ON
or
OFF
.
*Do not use a normal digital servo in the SR servo mode (ON). The servo
may be damaged.
Use a normal digital servo
in the
SR servo mode
(OFF)
.
2
Gain trimmer halfway to the left : NOMAL(green) or
right : AVCS (red) from the
70%
point.
3
Receiver ON → The GYD470 requires 3-5 seconds to
initialize when the power is turned on. Do not move
the car and do not move the steering wheel during this
initialization or the gyro may not initialize properly. Once
the initialization process has been completed the steering
servo will move (a little) several times indicating that the
GYD470 is now ready for use. If the neutral has shifted, LED
will blink orange. In that case, it reboots.
4
Using the gyro direction switch, adjust the gyro's
operating direction so that steering moves all the way
to the right when the car is turned to the left. Be sure to set
the operating direction correctly or the car will not run.
● Trimmer operation
*Since this gyro is also very small, the adjustment trimmer is also a small
part. Always operate the trimmer with the accessory mini screwdriver
and without applying unreasonable force.
*Limit is symmetrical from the neutral
position. Only proceed with the limit
adjustment after completing the trim
adjustment.
Gyro Sensitivity and mode Switching
Gyro Sensitivity and mode Switching
When the remote gain function is not used, the clockwise
direction from the center of the sensitivity setting trimmer
is the
AVCS
mode and the counterclockwise direction is the
NORMAL
mode. At the center position the sensitivity be-
comes zero and when the trimmer is turned fully to the left or
right, the sensitivity becomes 100%.
The sensitivity setting criteria by end point is shown in the
figure below.
＜
GAIN CH
＞
Gyro sensitivity zero --- LED OFF
AVCS side --- LED red
NORMAL side --- LED green
When the remote gain function is used,
NORMAL
and
AVCS
mode switching is performed in accordance with the direc-
tion of operation of the transmitter's remote gain channel.
At the
+ rate side
, the
AVCS
mode is selected and at the
–
rate side
, the
NORMAL
mode is selected. The sensitivity is
changed by adjusting the end point rate.
0%
NOMAL 70%
AVCS 70%
AVCS 100%
NORM 50% NORM 100%
0%
AVCS 50%
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