Manual Futaba CGY750 V 2.0 (page 3 of 27) (English)

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Meaning of Special Markings

3D\VSHFLDODWWHQWLRQWRVDIHW\ZKHUHLQGLFDWHGE\WKHIROORZLQJ

PDUNV

DANGER

- Procedures which may lead to dangerous conditions

and cause death/serious injury if not carried out properly.

WARNING

- Procedures which may lead to a dangerous condition

or cause death or serious injury to the user if not carried out properly

or procedures where the probability of superficial injury or physical

damage is high.

CAUTION

- Procedures where the possibility of serious injury to

the user is small, but there is a danger of injury, or physical damage, if

not carried out properly.

: Prohibited

: Mandatory

WARNING

Failure to follow these safety precautions may result in severe

injury to yourself and others.

• Read through the entire manual before operating this product.

BEFORE EACH FLIGHT:

Always check the transmitter and receiver battery voltage to ensure

they have enough remaining capacity to complete the ﬂight.

Always exit programming mode before attempting to ﬂy the model.

Only use the CGY750 with a 2.4GHz system such as the Futaba

FASST™ system, or a PCM system. Use with an FM system is strong-

ly discouraged since interference can cause serious operational prob-

lems.

Gyro operating precautions:

Gyro

The CGY750 requires 5-10 seconds to initialize when the power

is turned on. Do not move the helicopter and do not move the tail

rotor, aileron and elevator sticks during this initialization or the

gyro may not initialize properly. Once the initialization process

has been completed the swash servos and tail servo will move

several times indicating that the CGY750 is now ready for ﬂight.

Verify that the gyros are operating and compensating in the correct

direction before each ﬂight. If the compensation direction is incorrect

on any axis the model will become uncontrollable after takeoff.

Verify that the gyro is operating in the desired mode.

Verify that the gyro mounting pads are in good condition.

Verify that the gyro wires are not contacting the frame of the heli-

copter.

The servo type parameters within the CGY750 must match the type

of servo you are using. Incorrect setting may damage the CGY750 or

the servos, possibly resulting in a loss of control during 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

encompasses the CGY750 sensor. This may affect the overall perfor-

mance of the gyro.

Always allow the gyro to adjust to the surrounding environmental

temperature before ﬂight. A large temperature change during use will

cause drift and other operational issues.

The gyro sensor and control box have a electroconductive coating.

Do not allow any power leads or other wiring to come into contact with

these items.

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 position 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

Normal

AVCS) within one second. The servo will

center indicating that the new center position has been memorized.

When operating the gyro in AVCS Mode, all compensation and

revolution mixing must be disabled and any tail rotor or swash offsets

for ﬂight modes must be disabled.

When the CGY750 is operated in AVCS mode the tail rotor or

swashplate servos will not center when tail rotor, aileron or rudder

stick is released. This is normal operation for AVCS mode. The servos

RECAUTIONS

may also move to the extent while the model is being carried out to the

ﬂight line. Before take off, you must visually center the tail rotor pitch

slider and level the swash plate by using the transmitter control sticks.

You can also center the servos by moving the tail rotor stick full left, then

full right, back to full left and then allow the stick to center within one

second; the same method applies for aileron and elevator servos.

Do not drop the CGY750 sensor onto a hard surface or subject the

CGY750 sensor to a strong shock as this may damage the sensor.

Always use the supplied mounting pads or the Futaba replacement

mounting pads available from your local Futaba dealer.

Governor operating precautions:

Governor

When the throttle servo is connected to the CGY750, the battery fail-

safe function within the CGY750 must be setup and enabled.

Throttle fail safe function (transmitter setting): Use the fail safe func-

tion for the channel that turns the governor on and off to set the fail safe

position to the point at which the governor is turned off. With this setting,

when the system enters the fail safe state, the governor will be turned

off, and the receiver throttle signal (fail safe position preset) will be out-

put directly.

When using the condition hold function on the transmitter, always

set the throttle servo maximum operating point to less than the point at

which the governor is activated. If this is not done the governor may ac-

tivate while in condition hold.

While preparing for ﬂight or starting the engine, always ensure the

throttle remains below the governor activation point and do not select

any ﬂight modes that may activate the governor.

If you prefer to activate the governor while the model is still on the

ground, always ensure that you have at least -5 degrees of pitch in the

model before activating the governor. This negative pitch is necessary

to prevent an unexpected lift off as the governor activates and the head

speed increases to the desired RPM.

Periodically check the RPM sensor output to ensure proper governor

operation. Due to the high level of vibration and centrifugal forces the

magnet may come loose or the sensor alignment may change. Every

10th ﬂight verify that the magnet and sensor are properly mounted.

Width (Controller): LQ>PP@

(Gyro sensor):LQ>PP@

(Revolution sensor): LQ>PP@

Length (Controller):LQ>PP@

(Gyro sensor):LQ>PP@

(Revolution sensor): LQ>PP@

Height (Controller): LQ>PP@

(Gyro sensor):LQ>PP@

(Revolution sensor): LQ>PP@

Weight (Controller):R]>J@

(Gyro sensor):R]>J@

(Revolution sensor): R]>J@

Operating Voltage

: 9WR9'&

Current Drain:P$

Selectable Servo Frame:

+]+]DQG+]

5XGGHU*\URRQO\5DWH

Center Pulse Width:

6+]+]

  ȝV+]

Governor Resolution: +]USP

 (QJLQH530

RPM Accuracy:

Head Speed Range: USP

Operating Temperature: )WR)

 &WR&

Control System: 'LJLWDODGYDQFHGFRQWURO

Sensor:

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  6\VWHPV0(06*\UR

  +DOOHIIHFWVHQVRU

Angular Velocity Range: 'HJUHHV3HU

  6HFRQG*\UR

7KHRSHUDWLQJYROWDJHVKRZQRQO\DSSOLHVWRWKH&*<$OZD\VYHULI\WKDW

\RXUUHFHLYHUVHUYRVWDLOURWRUVHUYRVZLWFKDQGDQ\RWKHUHOHFWURQLFFRPSR-

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Futaba CGY750 V 2.0 Manual

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