Futaba GY440 Handleiding

Futaba Radio controll GY440

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Features of GY440 Set Contents

Connecting the GY440

Connecting the GY440 (S.BUS)

Mounting to Fuselage

Rudder Servo Linkage Check

The following items are supplied with the GY440:

Functions

Mini screwdriver

Sensor tape

Extension Cord: (Black)

Extension Cord: (Red)

Wiring strap

GY440

Monitor LED display

State Color Move Reference

1. No servo pulse /

sensor error Red Slow blink

2. Warm-up Green Fast blink

3. Sensor initialization Red/Green ON AVCS (Red)

Normal (Green)

4. Turn Red/Green Fast blink Right (Green)

Left (Red)

5. Neutral offset Orange Slow blink Stick operation

6. Gain off −OFF

7. Switch operation Green One blink Each time of switch

operation

8. Low battery Red One ﬂash Less than 3.8V

● Remote gain function and mode switching function

You can adjust gain from the transmitter by using the remote gain

function. Gain can also be adjusted with the trimmer on the GY440.

The mode switching function allows AVCS/NORMAL gyro mode

switching.

● Integrated, compact,and light weight

Compact size（20.5x20.5x11mm）and light weight（3.7g）

realized by high density mounting technology.

● Easy setup

The GY440 can be used immediately with minimum setup.

● Supporting the S.BUS/S.BUS2 connection

Only one wire connection to the receiver can operate the GY440.

NSTRUCTION

ANUAL

NSTRUCTION

ANUAL

Rate Gyro for Helicopters

For RC models

●Trimmer

（Limit / Gain）

●LED

●Servo Selection Switch ●Port1（Rudder input/S.BUS input）

●Port2（Gain input）

●Port3（Rudder output）

●Gyro Direction

Switch

WARNING

Failure to follow these safety precautions may result in severe injury

to yourself and others.

Always check the transmitter and receiver battery voltage to ensure

they have enough remaining capacity to complete the ﬂight.

The GY440 requires 3-5 seconds to initialize when the power is turned

on. Do not move the helicopter and do not move the rudder stick during

this initialization or the gyro may not initialize properly. Once the initializa-

tion process has been completed the rudder servo will move (a little) sev-

eral times indicating that the GY440 is now ready for ﬂight.

Always ensure that there is some slack in the gyro cables to help

maximize performance. Always use the supplied gyro mounting pads to

attach the gyro to the helicopter mechanics. Do not use a strap that en-

compasses the GY440 sensor. This may affect the overall performance of

the gyro.

If you are switching between NORMAL mode and AVCS mode in ﬂight,

please keep in mind that you must have the gyro re-learn the center posi-

tion after making a trim change within the transmitter. To memorize the

new center position simply ﬂip the gain switch on the transmitter three

times between NORMAL mode and AVCS mode (NORMAL →AVCS →N

ORMAL →AVCS →NORMAL →AVCS) within one second. The servo will

center indicating that the new center position has been memorized.

Be sure to use a digital servo. Use only digital servos with the GY440.

Using the GY440 with an analog servo will damage the servo.

Always check the direction of operation of the servos. If you attempt to

ﬂy the model when a servo operates in the wrong direction, the fuselage

will spin in a ﬁxed direction and enter an extremely dangerous state.

Do not drop the GY440 onto a hard surface or subject the GY440 to a

strong shock as this may damage the sensor.

When using the GY440 in the AVCS mode, set revolution mixing to

OFF.

Do not place gyro near heating equipment (engine, motor, ESC, bat-

tery, servo, etc.). Always allow the gyro to adjust to the surrounding envi-

ronmental temperature before ﬂight. A large temperature change during

use will cause drift and other operational issues.

Rudder servo

※Only digital servo

Gyro gain CH(Receiver)←connect→Port2(GY440)

Remote gain eﬀective. Trimmer(GY440) becomes LIMIT.

Gyro gain CH(Receiver)←It does not connect→Port2(GY440)

Remote gain is invalid. Trimmer(GY440) becomes GAIN.

Extension Cord:（Black）

Extension cord:（Red） GY440

Port 3

Port 1

Rudder CH

Gyro gain CH

Port 2

Receiver

S.BUS Receiver

S.BUS CH

Rudder --- 4CH

Gyro gain --- 5CH

GY440

Port 2 is not connected.

In S.BUS connection, the port 2

is not connected.

Remote gain is still eﬀective.

S.BUS/S.BUS 2 port

Rudder servo

※Only digital servo

Extension cord:（Black）

Port 3

Port 1

Main rotor shaft

90°

Gyro mounted to the helicopter

GY440

Sensor tape

LIMIT

GAIN

LIMIT

GAIN

Install the sensor so that the bottom of the

gyro is perpendicular to the main rotor shaft

axial direction. Offset of this axis will also re-

act in the roll and pitch directions.

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tion which sticks GY440 is free.

• No part of this manual may be reproduced in any form without

prior permission.

• The contents of this manual are subject to change without prior

notice.

• Futaba is not liable for any potential damage (accidental or oth-

erwise) that may occur after installation.

Before using your new gyro, please read this manual thoroughly

and use the gyro properly and safely. After reading this manual,

store it in a safe place.

Thank you for purchasing a GY440

gyro, a rate gyro for RC helicopters.

GY440 is a lightweight micro gyro

developed for RC helicopter rudder

(yaw axis) control. It can be used with

mininum setup and includes an S.BUS/

S.BUS2 port.

GY440 Ratings:

(Integrated sensor type rate gyro)

• Gyro sensor: MEMS vibrating structure gyro

• Operating voltage: DC4.0V to 8.4V

• Current drain: 30mA (excluding a servo)

• Operating temperature range: -10ºC to +45ºC

• Dimensions: 20.5 x 20.5 x 11.0mm (except protrusion)

• Weight: 3.7g

• Functions: Sensitivity trimmer. LED monitor. Servo

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*Oil on the sensor bottom and the part in-

stalled to the frame can be wiped off with

cleaner, etc.

GY440 installation precautions

· Always use the accessory sensor tape to

install the GY440. Install the GY440 the

center of the sensor tape.

· Depending on the vibration from the heli-

copter, the sponge may tear near the cor-

ners of the sensor tape. If the helicopter is

flown in this state, vibrations will not be

suﬃciently absorbed and the sensor may

fall oﬀ. Before ﬂight, always check the sen-

sor installation state. If the sponge is torn,

replace it.

Make the initial linkage connections in the NORMAL mode.

In this case, make adjustments mechanically and make mini-

mum trimmer adjustments at the transmitter.

In the NORMAL mode, make the following linkage checks:

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which the servo horn and control wire are perpendicular.

Perpendicular Control wire

Set the servo horn length based on

the helicopter manufacturer's instruc-

tions.

Move the rudder stick to the right and left and check the di-

rection of operation of the tail rotor. If the tail rotor turns in

the wrong direction, reverse the direction with the transmitter

reverse function.

1M23N30602

Adjustments Flight Adjustments

AVCS / NORMAL Mode

● A trimmer's operation

＊Since the trimmer is small and delicate, operate

it by gently using the provided mini screwdriver.

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Adjusting gain with the transmitter.

When S.BUS connection or the gyro gain CH of the port 2 of a

gyro and a receiver is connected.

1Set the servo selection switch to the setting for your tail rotor

servo. See chart below.

2Set up your transmitter by following the directions in the

manual. Gyro gain is set up to 50% by AVCS. Please refer to

the graph, AVCS, NORMAL or when unclear. It judges by the

LED on the GY440. AVCS: Red NORMAL: Green

3Receiver ON → The GY440 requires 3-5 seconds to initialize

when the power is turned on. Do not move the helicopter and

do not move the rudder stick during this initialization or the

gyro may not initialize properly. Once the initialization process

has been completed the rudder servo will move (a little)

several times indicating that the GY440 is now ready for ﬂight.

If the neutral has shifted, LED will blink orange. In that case, it

reboots.

4Move the rudder stick to the left and right and make adjustments

with the limit trimmer. Adjust for maximum travel, making sure the

servo horn doesn't hit the linkage.

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Adjusting gain with the GY440 trimmer.

When not using an S.BUS connection and port 2 is not connected.

In this case, a limit trimmer is automatically changed by the gyro

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left.

Adjust the transmitter and gyro while repeatedly taking oﬀ and

landing and with the aircraft on the ground.

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because it is dangerous.

1Set the sensitivity to the position at which hunting does not

occur during hovering and ﬂight.

2Adjust the hovering and flight rudder effect using the

transmitter's D/R or AFR function.

* Do not adjust with the End Point (ATV) function. If the End Point (ATV)

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AVCS 100%

NORMAL 100%NORMAL 50%

LIMIT

GAIN

AVCS 50%

＜A gain trimmer's work ＞

＜GAIN CH ＞

Operation in AVCS mode

If the rudder stick is operated or the helicopter is moved when the

helicopter was stopped during operation in the AVCS mode, the servo

will not return to the neutral position even if the rudder stick is re-

turned to the neutral position, and when the rudder stick is moved, the

rudder servo controls operation until the tail reaches the maximum

point. This is caused by addition of an integration function as an

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gyro constantly monitors movement of the tail and controls the servo

so that movement of the tail is stopped.

AVCS mode servo neutral position check method;

If the rudder stick or the helicopter was moved in the AVCS mode, the servo

will not return to its original neutral position. When the power is turned on,

the servo will return to the neutral position. The servo neutral position can

also be checked by the following method.

Neutral

position

Move the rudder stick 3 times to its full stroke to the left

and check method right at an internal of within 1 second

and immediately return the rudder stick to the neutral

position. The servo moves to the neutral position about 1

second later.

NORMAL mode sends control signals to the rudder servo only

when the tail of the helicopter moves. When the tail stops mov-

ing, the control signal from the gyro becomes zero. Conversely,

the AVCS mode continues to send control signals to the servo

even when the tail of the helicopter stops moving. The following

sequentially describes the NORMAL mode and the AVCS mode.

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helicopter is hovering under cross-wind conditions. With a nor-

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force of the cross-wind causes the tail of the helicopter to drift.

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gyro becomes zero. If the cross-wind continues to cause the tail

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Operation of AVCS mode

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gle and constantly outputs a control signal that resists the cross-

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gyro itself automatically corrects(auto trim) changes in helicopter

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accordance with the angle of rotation of the tail. When the tail

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tion. This is the auto trim function.

In AVCS operation

mode

In NORMAL operation

mode

Hovering in a cross wind.

The tail will drift.

AVCS is working

properly during

a cross wind.

If it starts right drift If it starts right drift

A head turns to a

direction of movement

automatically.

If no left rudder input

is given, the machine

will drift to the right.

Cross

wind Cross

wind

Hovering High-speed ﬂight

-50%

+50%

50%

100%

+100%

-100%

End point rate

Gain

NORMAL side（LED : GREEN）

AVCS side（LED : RED）

Please take a look at both the directions for the helicopter as well

as the transmitter.

LIMIT

GAIN LIMIT

GAIN

Hold the rudder

stick full left.

Adjust the left limit

with the trim.

Hold the rudder

stick full right.

Adjust the right

limit with the trim.

Adjust the linkage set

up to get the

maximum throw.

Adjust the linkage set

up to get the

maximum throw.

Bottom view of the

tail section with the

rudder stick full left.

Bottom view of the

tail section with the

rudder stick full right.

【Adjustment at the limit trimmer】

【Preﬂight check】

Helicopter is turned to the Left ⇒Rudder operates on the

Right.

*This check is performed in the state where an engine (motor)

never starting.

5If the rudder servo moves to the Right when the nose of the

helicopter moves to the Left, the gyro direction is correct. If

the rudder servo moves to the Left, switch the direction using

the Gyro Direction Switch.

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Left and cause an extremely dangerous situation.

First, we suggest to start with AVCS set to 50%.

FUTABA CORPORATION

1080 Yabutsuka, Chosei-mura, Chosei-gun, Chiba-ken, 299-4395, Japan

Phone: +81 475 32 6982, Facsimile: +81 475 32 6983

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What is S.BUS?

Unlike conventional radio systems, the S.BUS system uses

data communication to transmit control signals from a

receiver to a servo, gyro, or other S.BUS compatible device.

This data includes commands such as “move the channel 3

servo to 15 degrees, move the channel 5 servo to 30 degrees”

to multiple devices. The S.BUS devices execute only those

commands for their own set channel. For this reason, it can

be used by connecting multiple servos to the same signal

line.

* Set the channel at the S.BUS servos by using an SBC-1 channel changer or a CIU-2 USB serial interface.

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Similarly the procedure of 1.3.7 is followed.

LIMIT

GAIN

1520uS: BLS254, BLS257, S9254, S9257,etc.

760uS: BLS256HV,BLS251, S9256, S9251

Product specificaties

Merk:	Futaba
Categorie:	Radio controll
Model:	GY440

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