Futaba Cgy750 User manual

TABLE OF CONTENTS

• Introduction -----------------------------------------------------------------2

•

Warranty and Repair Service (in U.S.A.)

---------------------------------2

• Features ----------------------------------------------------------------------2

• Contents ----------------------------------------------------------------------2

• Precautions ------------------------------------------------------------------3

• Specications ---------------------------------------------------------------3

• Replacement and Optional Items --------------------------------------4

• Gyro Sensor Installation ------------------------------------------------------ 4

•

Connecting the CGY750

----------------------------------------------------5

• TX Set-up ------------------------------------------------------------------------- 6

• Governor Installation -----------------------------------------------------6

• Governor Fuselage Setting Precautions -----------------------------6

• First Map ------------------------------------------------------------------------- 7

• Opening Screen-------------------------------------------------------------7

• Home Screen ----------------------------------------------------------------7

• Warning Display ------------------------------------------------------------8

• Setting Menus --------------------------------------------------------------9

• S.BUS Basic Setting ------------------------------------------------------10

• Swash Servo Installation and Setup ---------------------------------11

• Aileron/Elevator Gyro Setup ------------------------------------------ 11

• Swash Basic Setting -----------------------------------------------------12

• Swash Detail Setting ----------------------------------------------------14

• Linkage Compensation -------------------------------------------------15

• Flight Tuning Setting ---------------------------------------------------16

• Tail Rotor Gyro Set Up and Rudder Basic Setting ----------------17

• Governor Basic Setting -------------------------------------------------18

• Governor Speed Setting ------------------------------------------------ 20

• Governor Operation -----------------------------------------------------20

• Recommended Gyro Gain Settings ----------------------------------20

• Before Flight Checklist --------------------------------------------------20

• Adjustments During the Test Flight ---------------------------------20

• Tunning Guidelines for CGY750 -------------------------------------- 21

• Tips for Using the CGY750 Governor with Electric Models ----21

• Flight Tune Expert Setting --------------------------------------------- 22

• Rudder Gyro Expert Setting -------------------------------------------22

• Governor Expert Setting ----------------------------------------------- 23

• Condition Menu ---------------------------------------------------------- 24

• CGY750V2-3D-MAP ------------------------------------------------------26

• CGY750V2-F3C-MAP -----------------------------------------------------28

• F3C Style Tuning Section -----------------------------------------------30

Gyro

: Instructions for gyro functions

Governor

: Instructions for governor functions

Technical updates and additional programming examples can be found at:

www.futaba-rc.com/faq

1M23N24914

V2.0

INTRODUCTION

WARRANTY & REPAIR SERVICE (IN U.S.A.)

If any difculties are encountered while setting up or operating your

CGY750, please consult the instruction manual rst. For further as-

sistance you may also refer to your hobby dealer or contact the Futaba

Service Center at the web site, fax or telephone number listed below:

www.futaba-rc.com or www.hobbyservices.com

Fax (217)-398-7721,Tel (217) 398-0007

If you are unable to resolve the issue, pack the system in its original

container with a note enclosed and a thorough, accurate description of

the difculty. Include the following in your note:

• Symptoms (including when the problem occurred)

• System (Transmitter, Receiver, Servos and model numbers)

• Model (Model name)

• Model numbers and quantity

• Your Name, Address and Telephone number

Send the respective items to the authorized Futaba Service Center Ad-

dress below:

Futaba Service Center

3002 N Apollo Drive Suite 1

Champaign, IL 61822

The Futaba® CGY750 is a combined 3-axis head-

ing hold AVCS gyro and head speed governor in

one box. Its cutting-edge MEMS (Micro Electro

Mechanical System) sensor design, ultra high-speed

processing speed and advanced PID control algo-

rithm put it a quantum leap ahead of all other head-

ing hold gyros in size, weight and performance. The

CGY750 has been optimized to work for ybarless

helicopters.

FEATURES

• Combined 3-Axis Gyro and Governor in one box.

• High speed operation and extremely low latencies result in greater

stability.

• Low prole, small size and light weight.

• Small size of the gyro and governor controller, 44 x 29 x 12mm, 13 g

• Utilizes a 128 x 36 dots graphical white color OLED (Organic Light

Emitting Display), high brightness and contrast even in direct sun-

light.

• Settings divided into Basic and Expert menus. The basic setting is for

initial setting and Expert setting is for more advanced settings.

•

Firmware can be updated from a Windows based personal computer

when used with the optional CIU-2 interface.

• S.BUS compatible. Only one connection is necessary between the

S.BUS receiver and CGY750 control box for operation.

• Gyro section

• Advanced and adaptive PID control loop is utilized

• Small and low prole 3-axis gyro sensor. 21 x 21 x 8.5mm, 8g

Rudder (yaw) section:

• Capable of sensing angular velocity up to +/- 1,200 deg/sec.

•

Compatible with 1520μS Analog (70Hz), 1520μS Digital (280Hz), and 760μS

Digital (560Hz) tail rotor servos.

• 3D and Sports ight mode

•

Feed Forward Option allows the CGY750 to consider other control functions

during operation. This results in more accurate corrections and precise opera-

tion.

• Cutting edge control algorithm provides a consistent pirouette rate, precise

operation, and smooth yaw control in any ight condition.

Aileron, Elevator (roll, pitch) section:

• Developed specically for ybarless helicopters.

• Included preset parameters for helicopter types (450-550, 600-700, and

750+) along with control feel preset parameters make initial setup as easy

as pressing a button.

• Supports H3-120, H3-140, H3-90, H4-00, and H4-45 swashplate types.

• Governor section

• Advanced and adaptive PID control loop is utilized.

• High speed operation and extremely low latencies provide a more consis-

tent and accurate operation.

•

Capable of governing head speeds from 700 RPM through 4000 RPM

• Compatible with 1520μS Analog (70Hz) and 1520μS Digital (280Hz)

throttle servo types.

• Feed Forward Option allows the CGY750 to consider other control func-

tions during operation. This results in precise governing of the head speed.

• Governor or Revolution Limiter mode selectable.

• Supports gear ratios from 1.00 through 50.00.

• Cutting edge control algorithm provides more consistent RPM governing.

• Revolution sensor is compatible with the GV-1. The CGY750 also sup-

ports a optional back plate revolution sensor and brushless phase sensor.

• Other functions

• Maximum RPM memory.

• Cumulative engine operation timer.

• Power saving OLED.

Type of set

• Gyro & Governor set w/R6303SB

• Gyro & Governor set

• Gyro set w/R6303SB

• Gyro set

SET CONTENTS

CGY750 Control Amp

*Mini Screwdriver

*Dust Covers (x3)

XXXX

Gyro Sensor

*Mounting Pads (x3) XXXX

Revolution Sensor

*Sensor Mounting Hardware

*Magnet (x2)

--- --- X X

R6303SB Receiver --- X --- X

Extension Cord XXXX

X: supplied ---: not supplied

CONTENTS

Your CGY750 includes the following components:

Extension Cord

R6303SB Receiver

Sensor Mounting Bracket

CGY750 Control Box

Mounting Pads

Adjustment Screwdriver

Gyro Sensor

Magnets (2)

Dust Cover

Revolution Sensor

Meaning of Special Markings

Pay special attention to safety where indicated by the following

marks:

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

PRECAUTIONS

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): 1.14in [29mm]

(Gyro sensor): 0.83in [21mm]

(Revolution sensor): 0.30in [7.5mm]

Length (Controller): 1.73in [44mm]

(Gyro sensor): 0.83in [21mm]

(Revolution sensor): 0.63in [16mm]

Height (Controller): 0.47in [12mm]

(Gyro sensor): 0.33in [8.5mm]

(Revolution sensor): 0.39in [10mm]

Weight (Controller): 0.459oz [13g]

(Gyro sensor): 0.282oz [8g]

(Revolution sensor): 0.141oz [4g]

Operating Voltage

: 3.8V to 8.4V DC*

Current Drain: 70mA

Selectable Servo Frame:

70Hz, 280Hz and 560Hz

(Rudder Gyro only) Rate

Center Pulse Width:

1520µS (70Hz & 280Hz)

760μs (560Hz)

Governor Resolution: 0.1Hz (6rpm)

(Engine RPM)

RPM Accuracy: 1%

Head Speed Range: 700-4,000rpm

Operating Temperature: 14°F to 113°F

(-10°C to +45°C)

Control System: Digital advanced control

Sensor:

Micro Electromechanical

Systems (MEMS) Gyro

Hall effect sensor

Angular Velocity Range: ±1,200 Degrees Per

Second (Gyro)

* The operating voltage shown only applies to the CGY750. Always verify that

your receiver, servos, tail rotor servo, switch and any other electronic compo-

nents used in your installation are capable of operating at the voltage you plan

to use.

SPECIFICATIONS

REPLACEMENT & OPTIONAL ITEMS

Futaba PC Interface CIU-2: FUTM0951

Extension 200 mm:

Extension 350 mm:

Extension 55 mm:

Extension 80 mm:

Extension 130 mm:

Mounting Pad:

1x22x22 mm (10)

WARNING

Newer high end servos and other radio equipment

are capable of placing large demands on the power

systems in use today. When using a regulator you

must ensure that the regulator is capable of supply-

ing the current demands of the equipment you have

selected. In addition to this make sure the wiring

and switch you have selected are capable of han-

dling high current draws.

• The servo current draw can be up to 50% higher on a ﬂybar-

less helicopter. Always ensure your receiver battery is fully

charged before each ﬂight.

Even though the CGY750 is a high performance

gyro and governor, it will be necessary to ensure

that the helicopter mechanics are also in optimum

operating condition. Please use the guidelines be-

low and address all issues before installing and ﬂy-

ing the CGY750.

• The CGY750 must be used with a rigid tail rotor drive system.

Any modern torque tube or belt drive system should be ad-

equate. Do not attempt to ﬂy the CGY750 using a wire driven

tail rotor system.

• Always ensure the drive gears, torque tube, pulleys, belt,

bearings and shafts are in proper working condition. If any of

these items are damaged or worn they must be replaced.

•

The linkage rod, tail rotor bell crank, pitch slider and tail rotor

grips must operate without friction to obtain the best perfor-

mance from the CGY750. Binding in the tail rotor control linkage

will decrease the performance of the CGY750 gyro and this may

also shorten the servo lifespan. Please take the time now to en-

sure the tail rotor system on your helicopter is working correctly

and without friction or binding.

• Vibration will affect the CGY750’s overall performance. All

rotating components on the helicopter should be balanced

to minimize vibrations in flight. Ensure that your engine or

electric motor is running smoothly and that all vibrations have

been addressed before installing and test ﬂying the CGY750.

Gyro sensor replacement:

• Each CGY750 gyro control box is calibrated speciﬁcally for

the gyro sensor included. Do not attempt to use another

CGY750 sensor with the control box as performance will suf-

fer due to being out of calibration. The calibration process

must be completed by an authorized service center.

If your sensor needs replacement, please send the complete

unit to your region’s support center for repair.

The gyro sensor should be mounted on a rigid platform, at least 6in

[152mm] away from a Nitro Engine. It is not necessary to mount

the gyro near the main shaft of the helicopter but it is very important

that the mounting area chosen is rigid. Please refer to your helicopter

manufacturer’s instructions for recommended mounting locations.

Test t the gyro sensor, ensuring that the sensor is in perfect alignment

with the helicopter on the roll and pitch axis. The cable from the gyro

sensor must exit toward the front or the rear of the helicopter since this

is the pitch axis. Any misalignment will cause a loss of performance,

so it is very important to ensure that everything is aligned properly.

Once you are certain everything is properly aligned and that the sensor

lead can be routed to the gyro, go ahead and mount the gyro sensor

to the helicopter using one of the supplied gyro pads. Route the gyro

sensor lead to the CGY750 control box and plug the lead into the gyro

sensor port. Verify that the connector is rmly locked in place.

Gyro Sensor

• Elevator (Pitch) axis

• Rudder (Yaw) axis

• Aileron (Roll)

axis

GYRO SENSOR INSTALLATION

Important: The CGY750 gyro sensor must be mounted so that the

roll and pitch sensing axis are in alignment with the helicopter. Any

misalignments over 1/2 of a degree will cause a loss in performance.

Please take extra care in this step to ensure the optimum ﬂight perfor-

mance.

TROUBLESHOOTING

If any issues are noted during ﬂight (such as drifting, inconsistent hold

or inconsistent control rates) then please review the following trouble-

shooting recommendations.

1. Always verify that the tail rotor and swash plate mechanisms oper-

ate, and that the drive system is in proper working order.

2. Electromagnetic interference could be causing the problem. If you

feel everything is set up correctly and that the helicopter is vibration

free, then consider moving the gyro sensor to a new location away

from servos, ESC and drive motors.

3. Vibrations will decrease the performance of all gyro systems. Even

though the CGY750 gyro sensor is the most vibration resistant gyro

sensor available, eliminating vibrations will always improve perfor-

mance. Throughout extensive testing it has been found that the

CGY750 gyro sensor performs best when the sensor is mounted

rigidly to the airframe. This is mainly due to the sensing of all 3

axes. It is highly recommended to avoid using soft foam pads as

this may allow the gyro to bounce around on the roll and pitch axis,

causing instabilities and possible loss of control during ﬂight.

• The bottom of the CGY750 Gyro

Sensor must be perpendicular to

the main shaft.

• The roll axis must be parallel to

the tail boom and the pitch axis

must be perpendicular to the side

frame.

OLED Display

• Displays menus, parame-

ters and status information.

Edit Keys

• Used when setting data.

• Use the included plastic ad-

justment screwdriver to press

the buttons.

CONNECTING THE CGY750

Connection to the receiver, servos and sensors

The CGY750 requires an S.BUS receiver or the optional PWM Re-

ceiver to S.BUS adapter available separately.

Using the supplied extension connect the S.BUS receiver port (or from

the S.BUS PWM adapter) to the CGY750 S.BUS port. Install your

receiver battery, regulator, switch and any other necessary electronics

now. Connect the power lead of your switch / regulator to the battery

connector on the receiver.

Plug the cyclic servos (AIL-[Aileron], ELE-[Elevator], PIT [Pitch],

RUD [Tail Rotor] and if using the H4xx swash plate type TH/E2-

[Elevator 2]) into the appropriate port on the CGY750.

Determine the best location to place the receiver and CGY750 control

box. Mount the receiver and the CGY750 control box to the helicop-

ter mechanics using vibration adsorbing self adhesive foam pads. The

CGY750 gyro sensor will be installed in a later step.

Using wire mounts, wiring xtures molded into the helicopter, or hook

and loop material, route the servo leads and extensions. Make sure the

wires are not rubbing against metal or carbon ber which may damage

the wires.

S.BUS channel setting

Since the S.BUS protocol uses a single wire to transmit all channel

information to the CGY750 it is necessary to assign each channel

number (1 through 16) a function (such as aileron, pitch, collective,

gain, ail gain, ele gain, rpm, gv on/off) within the CGY750 control

box. The default CGY750 S.BUS channel assignments should work

properly with most Futaba transmitters. If you experience any prob-

lems please refer to the S.BUS section of the manual to set/verify each

channel number for each function.

If your transmitter does not offer enough channels to operate all of the

CGY750’s functions, it is possible to operate the CGY750 without the

GV On/Off, Ail Gain, and Ele Gain channels connected. When any these

functions are not used, it is necessary to set the channel number to [INH]

within the CGY750’s S.BUS menu to disable the function and to use the

setting value inside the CGY750 menu instead.

When the GV On/Off channel is not used, the governor on/off control is

handled by the [Stick Switch] function.

When the remote Ail or Ele Gain channels are not used, the operating

mode (NOR/AVCS) and gain value can be set in the appropriate AIL /

ELE Basic menu option by using the Data +/- keys when the function is

displayed.

Using the CGY750 with a electric helicopter

DANGER

It is necessary to remove the pinion gear from the electric motor

or disconnect the motor from the ESC before powering the model

up for setup or bench testing. Electric motors are extremely pow-

erful and capable of delivering the power instantly, causing injury

to yourself, others, or the surroundings.

If the CGY750 is being installed into an electric helicopter and the

ESC’s own internal governor is to be used, you may want to consider

connecting the ESC to the [TH/E2] (throttle / elevator 2) output of the

CGY750. Before doing this you must remove the pinion gear from

the electric motor or disconnect the motor from the ESC before power-

ing the model up the rst time. Once the model has been powered up,

navigate to the gyro mode function and set it to [GYRO+THR]. This

sets the CGY750 to act as a gyro and throttle output. The CGY750

will simply pass the throttle signal from the receiver through to the

TH/E2 port on the CGY750.

Once your ESC is connected to the CGY750, you must complete all

necessary transmitter setup (ATV / EPA / REV / ETC) per your ESC

instructions. Please refer to the end of this manual for further sug-

gestions for the use of the CGY750’s governor with electric powered

models.

(1) Gyro Sensor:

• Connect the gyro sensor.

*Insert the sensor connector until it is

ﬁrmly locked.

(2)

Rsen (Revolution sensor)

• Connect the revolution sensor.

(3) S.BUS:

• Connect to the S.BUS output of the

receiver with the supplied extension.

(4) AIL Output:

• Connect the aileron servo.

(5) ELE Output:

• Connect the elevator servo.

(6) PIT Output:

• Connect the pitch servo.

(7) TH Output:

• Connect the throttle servo.

• Connect the ESC w/BEC and set the

operation mode to Gyro+THR mode.

(7) E2 2nd ELE Output:

• Connect the second elevator servo.

(Swash mode: H4-00 or H4-45)

(8) RUD Output:

• Connect the rudder servo.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

* This diagram shows the various con-

nections between the CGY750 and

receiver, servo, or sensors.

* If the governor and limiter functions are

disabled when using the [Gyro+THR]

mode then the throttle signal is sent

directly to the TH/E2 connection on the

CGY750. In this case you may connect

the throttle servo to the appropriate

channel on the receiver or to the CGY

TH/E2 connector.

*When the swash mode is set to H4-xx

mode, the TH terminal is changed to

2nd elevator output. In this case, the

governor function is inhibited.

WARNING

You will feel resistance at two points

when inserting the connector. Make sure

that you plug in the connector completely,

or connection problems may result.

Installing the Sensor Connector

1) First resistance (incomplete

connection)

Locking tab

2) Second resistance (fully

connected)

●Continuepushingtheconnec-

toruntilyouhearthelockingtab

“click.”

H-1

Swash Type

Your transmitter

should be reset

to the default

settings and the

swash plate type

selected with the

transmitter should

be set to Normal

(H-1) or single

servo mode. All

CCPM mixing is set up and handled

with the CGY750, and the transmitter

functions should not be used. Before

starting helicopter set-up, be sure

that all dual rates, pitch curve, and

endpoint values are set to 100/100.

GOVERNOR INSTALLATION

Modify the cooling fan and install the accessory magnet and attach the

magnetic sensor to the engine at the position shown below. Balance

the cooling fan as needed following magnet installation.

Cooling fan

Magnet (Embedded in cooling fan.)

Sensor (Attached to engine ﬂange

through a stay.)

When installing the sensor mag-

net to the mufer side, also refer

to the needle side mounting.

Magnet operating side check

Bring the magnet near the end of the sensor and check the operating side.

Magnet

Sensor

This is the side at which the displayed value increases in the “Revolution

sensor testing” menu within the “Governor Basic Setting” section earlier

in this manual. Install the magnet with this side facing the sensor. Mark

this side of the magnet with a felt tip pen.

Cooling fan modication

Drill a hole in the fan at the magnet mounting position. Make the hole

about 4.1mm in diameter and 1.5 to 1.7mm deep.

Embed the magnet in this hole in the direction in which an output is ob-

tained. Use epoxy adhesive that cures in 30 minutes or longer. Do not use

epoxies that contain metal such as JB Weld.

Magnet

Cement the magnet to the cooling

fan so that the magnet is level

with this side of the cooling fan.

If the cooling fan is unbalanced and vibrates, etc., balance it by mounting

the spare magnet to the opposite side of the cooling fan in the opposite

polarity (so that it does not output a signal).

Sensor mounting

The sensor mounting method depends on the helicopter and engine.

Mount the sensor to the sensor stay. (Temporary assembly)

Drill a hole in the fan cover at the part corresponding to

the sensor so that the distance between the sensor and

magnet can be made 1 to 2mm.

Tighten the sensor stay together with the engine mounting

ange. (Temporary assembly)

Select the mounting method so that the sensor does not

touch the frame, or other parts of the helicopter. Temporar-

ily mount the sensor and select the magnet mounting posi-

tion.

Install the sensor to the sensor stay using the accessory

screws and washers.

Tighten the sensor stay together with the engine using the

engine mount screw.

Sensor adjustment

Adjust the sensor position to obtain a sensor output of at least 60% in the

“Revolution sensor testing” menu within the “Governor Basic Setting”

section earlier in this manual.

1-2mm

Magnet

Sensor

2.2

3.7mm 3.7mm

Center of sensor

is offset.

Sensor

case

The center of the sensor is different from the center of the sensor case so

be careful when mounting the sensor.

If the display is less than 60% when the magnet is directly below the

sensor, bring the sensor closer to the magnet so that the 60% or more is

displayed. The magnet and sensor gap criteria is approximately 1 to 2mm.

If a sensor output is not obtained even when the sensor is brought close to

the magnet, the magnet and sensor center positions may have changed.

Complete assembly of the sensor by securely tightening the screws that

were temporarily tightened.

Recheck the sensor output.

GOVERNOR FUSELAGE SETTING PRECAUTIONS

Throttle servo linkage precautions

To effectively use the governor, observe the following precautions

when connecting the servo linkage.

Make the servo operating range as wide as possible. Make the throw of

the transmitter EPA (ATV) function and AFR function as close as possible

to 100%.

Fly with the governor turned OFF and adjust the needle so that the engine

smoothly reacts to movement of the transmitter stick.

If there is a point at which the reaction of the engine is considerably dif-

ferent due to a too rich or too lean mixture, the governor may not operate

to its maximum potential.

Fuselage vibration countermeasures

If the helicopter frame is weak, or the engine mount is deformed or not

installed properly, the vibrations applied by the engine will increase.

Engine vibrations will lead to unstable speed and prevent the governor

from providing maximum performance. Therefore, make sure that the

engine is vibration free and that the carburetor provides linear throttle

control because the governor cannot correct engine problems.

Use of a tuned silencer

The use of a tuned pipe type silencer may cause the engine throttle

response to be substantially different from that of a normal mufer.

Adjust the needle (and pipe length) so that engine speed changes are

proportional to the throttle opening. The governor will not perform

satisfactorily with a mufer or a pipe that does not allow the carbure-

tion to be linear.

TX Set-up

Condition selection

Condition selection incorporates two adjustable values for a given

parameter (displayed c1/c2). This is dictated by the digital channel

number “1” within the Function Menu of your transmitter (DG1). As-

signing DG1 to a switch or ight mode allows the use of two separate

variables on the condition selectable parameters.

Rotor Head Gyro Gain “RotHd.Gn”

In the SBUS menu assigning “RotHd.GN” to a channel will allow the

Rotor head gain to be adjusted via the TX. If you are using a 6CH or

less TX, setting “RotHd.Gn” to “INH” will then default the gain to

“BaseGain” in the Flight Tuning menu. Suggested setting and default

is CH9.

Tail Rotor Gain “RGn”

In the SBUS menu assigning “RGn” to a free TX channel will allow

for the tail rotor gain to be adjusted via the TX. Suggested setting and

default is CH5.

Note - Before starting helicopter set-up, be sure that all dual rates,

pitch curve, and endpoint values are set to 100/100.

OPENING SCREEN Home SCREEN

Verify that all of the connections are correct between the CGY750, re-

ceiver, and power supply. If your helicopter is using an electric motor

for propulsion, remove the pinion gear now for safety.

If this is the rst time the helicopter has been powered up, remove the

servo arms and linkages to prevent damaging the servos if any binding

is present. Power up the transmitter and allow it to initialize. Turn

the receiver on or connect the ight battery and allow the helicopter to

remain motionless while the CGY750 initializes.

The display will rst show the ID number of your CGY750 and the

Firmware Version.

After the CGY750 has powered up the screen will change to show an

animation of a helicopter performing a stationary ip. This indicates

that the initialization process is taking place. The helicopter must re-

main perfectly still so the controller can determine the gyro’s center

position for each axis.

Once the initialization process has been completed the Home Screen

will be displayed and the cyclic + tail rotor servos will move several

times in quick succession.

If the CGY750 is set to the [Gyro+THR] mode or if the H4-xx swash

plate type has been selected then the governor will be disabled and the

screen will look like (d) below instead. The display will cycle through

and show the current AIL, ELE and RUD gains.

Initial Home screen

1. Axis indication 2. Gyro operation mode

3. Gyro gain

4. on/off switch

5.Yaw rate comp

7. Setting Menus

6. Battery voltage

(b) Aileron gain

display

(d) Gyro only

mode

1. Axis indicator

Gyro

The axis indicator will cycle every two seconds and show the axis (AIL,

ELE or RUD) and their respective current gain values.

Home screen

Push DATA

+/– key

Push DATA

+/– key

Push DATA

+ key

Push DATA

+ key

- key

Push MODE

+/– key

Thick line

shows MODE.

Maximum

RPM

Condition#

indication

Engine

runtime

OLED

Setting

Maximum

Roll Rate

Maximum

elevator rate

Push DATA

+/– key

Thin line

shows DATE.

Push MODE +/– key

for 1 second

Swash

Flight Tuning Expert

Gyro (RUD)

Governor

FIRST MAP

Rudder gain display

The ﬁgure shows the ﬁrst layer of the editing

sequence.

Setup style

Condition

CondData

Cond. 1

When CondMenu is ON, this

changes into CondMenu.

Gyro (AIL) Gyro (ELE)

2. Gyro operation mode

Gyro

The display indicates either [A] for AVCS or [N] for Normal operat-

ing modes. If the [A] is shown in inverted colors then the rudder

neutral is offset and re-learning the center position should be com-

pleted immediately.

RUD AVCS Mode

at 100% gain

RUD NOR Mode

at 100% gain

Neutral offset at

AVCS mode

When using the AVCS operating mode, the servos will not re-center when

the control stick is released. If you need to center the servo, you can move

the appropriate control stick to its full extent (left & right or up & down)

twice and allow the control stick to return to center within a one second pe-

riod of time, and the servo(s) for that axis will return to center position.

For example if you move the tail rotor stick full left, full right, full left, full

right and allow it to come back to center within one second, then the display

will change to show [--------], and the tail rotor servo will center.

When using the AVCS operating mode and if trim changes have been made

on any axis, then the neutral position must be read and memorized by the

CGY750. To do this simply change the operating mode twice within one

second (for example Normal → AVCS → Normal → AVCS) and the display

will change to [********] to indicate that the current stick position has been

memorized as the new neutral position.

3. Gyro gain

Gyro

This indicates the current gyro gain for the axis noted in the Axis Indicator

position.

4. Operating condition

Governor

This indicates whether the governor is [ON] or [OFF].

5.Yaw rate comp.

Governor

This indicates that the Governor yaw feed forward function is enabled.

6. Battery voltage

This indicates the battery voltage. The display will change to show [LOW BAT]

once the voltage has fallen below the Battery fail safe voltage setting (BFS).

7. Setting Menus

Pushing this button will exit the normal operating mode and enter the set-

tings menu mode.

RPM display

Governor

The battery voltage display automatically changes to the engine RPM

display once the engine is running and returns to battery voltage dis-

play once the engine has stopped running. The RPM display can be

either the head speed or the engine speed depending on the setting

in the revolution display mode setting found in the governor Expert

menu.

Home screen options

When the home screen is shown the mode [+] and [-] keys can be used

to cycle the bottom line through the following items; Battery voltage,

Max RPM, Engine runtime, OLED display options, Operating Mode,

Roll rate maximum display, and Elevator rate maximum display.

1. Engine runtime

Governor

From the home screen press the mode [+] key twice to show the engine

runtime display. The time shown is how long the engine has been running.

This is a cumulative timer and the value is maintained in memory. To reset

the timer simply press the data [+] or [-] key for more than one second and

the timer will reset back to 0.

2. OLED display options [default: Saver]

When the [Saver] option is selected, the display will dim after 60 seconds

of inactivity. Once a button is pressed on the CGY750 controller box, the

OLED will switch back to full brightness. The [Saver] option helps to con-

serve power and extend the life of the display. When the [Light] option is

selected the display will remain at full brightness at all times.

3. Setup style

3D Mode is a known conguration of parameters for 3D and F3C ying.

F3C Mode is for Advanced F3C tuning only.

*The changed menu is indicated on a map.

*When the style is changed, setting of AIL/ELE/RUD is initialized.

4. Condition menu [default: OFF]

2 conditions can be established by the switch (DG1) of the transmitter.

When the condition menu is turned on, [CondMenu] appears newly.

It becomes possible to change the function indicated by a map of [CondMenu]

to 2 conditions.

The function included in [CondMenu] disappears from the usual menu.

5. Roll rate maximum display

Gyro

This screen displays the maximum roll rate recorded during flight. This

value is reset back to 0 when the CGY750 is powered up.

6. Elevator rate maximum display

Gyro

This screen displays the maximum elevator rate recorded during ight. This

value is reset back to 0 when the CGY750 is powered up.

7. Maximum RPM

Governor

From the home screen press the mode [+] button once to show maximum re-

corded RPM [Mrpm]. The [Mrpm] value is maintained until you clear it by

pressing the data [+] or [-] key for at least one second. This function allows

you to check for over speeding during ight.

8. Condition #

Current condition# is indicated.

WARNING DISPLAY

Governor warning display

Governor

The warning symbol is displayed when the governor is activated dur-

ing power up. Immediately switch to a condition that has the governor

disabled, and the symbol will disappear. When this warning symbol

is shown, the governor will be disabled until the ight condition has

been turned off. The engine must be started with the governor turned

off.

Sensor Error Gyro

WARNING

The helicopter must remain motionless during the initialization process

or a [SensorER] sensor calibration error may occur.

If a sensor error occurs during initialization, the sensor itself may be

defective.

Please contact your region’s technical support center (the contact in-

formation can be found in the beginning of this manual).

Low battery

WARNING

The [Low Batt] warning is displayed if the receiver battery voltage falls

below the [BAT/FS] voltage set within the CGY750 Governor Expert menu.

If this condition lasts for more than one second, then the Battery Fail Safe

function activates, and the throttle servo is brought back to idle position.

This is done to warn you that the battery voltage is dangerously low and that

you must land immediately.

Return servo to center position

Read and memorize the current

neutral position.

– key

Push DATA

+/– key

Push DATA

+key

SETTING MENUS

WARNING

Always exit the Setting Menu and return to the home screen before ﬂy-

ing your model. The gyro operation is disabled within several of the set-

tings menus to ease set up.

Always check the operation of the CGY750, verify that the controls are

operating the correct direction and ensure the gyros are correcting in the

proper direction for all axes prior to attempting to ﬂy the model.

The data [+] and [-] keys are used to navigate through the Setting

Menus: [RUD.Gyro], [AIL.Gyro], [ELE.Gyro], [SWASHset], [Gov-

ernor]* and [S.BUS] Basic menus. Once the desired menu is shown

press and release the mode [+] or [-] key to show the next or setting

items respectively.

The expert menus are entered or exited by pressing and holding the

mode [+] or [-] key for one second. To exit the current menu simply

go back to the Basic Settings Menu for the function (for example,

[AIL.Gyro - Basic]) and press and release the mode [+] or [-] key

until the home screen is shown.

Please see the Setting Menus diagram for a complete listing of the

Home Screen, Basic and Expert menus.

*The [Governor] setting menu is not displayed if the Operating Mode has been

set to [Gyro+Thr] or if the swash plate type has been set to the H4 xx type.

The throttle operation can be temporarily reactivated by bringing the

transmitter control stick all the way back to idle; normal throttle func-

tion will return. After 30 seconds the Battery Fail Safe function will

activate again requiring you to repeat this process if necessary. The

model should be landed as soon as possible.

Memory writing indicator

WARNING

Do not power off the CGY750 when the Memory writing symbol is dis-

played.

When a setting is changed within the CGY750 the new value must

be written to memory. The “Memory writing indicator” is displayed

during this process. This process may take up to two seconds, and the

power must not be switched off during this time.

If the power is switched off during the writing process, then all of the

settings may be lost.

(1) S.BUS connection setting:

start display

Use the mode [+] or [-] keys to

navigate through the menu.

Setting ranges common: 1 ~ 16ch, DG1,

DG2, INH

WARNING

Always verify that the S.BUS function as-

signments match your transmitter’s function

(in the FUNCTION menu) assignments. If any

changes are made within the transmitter func-

tion assignments, then it will also be necessary

to make the changes within the S.BUS function

assignments.

S.BUS BASIC SETTING

Since S.BUS sends all 18 channels (may be limited by your transmitter) over a single wire, it is necessary to assign a CGY750 function (such as

AIL, ELE or PIT) to each channel. The channel assignments are performed within the [S.BUS].Basic menu.

If a function is not going to be used, then it must be set to [INH]. For example, if the AGN and EGN remote gain functions are not going to be used,

then set them to [INH] and the CGY750 will then allow you to make gain adjustments within the respective menu.

S.BUS BASIC MAP

(2) S.BUS setting: Aileron channel [default: 1ch]

Using the data [+] or [-] keys to set the correct channel number.

(3) S.BUS setting: Elevator channel [default: 2ch]

Using the data [+] or [-] keys to set the correct channel number.

(4) S.BUS setting: Throttle channel [default: 3ch]

Using the data [+] or [-] keys to set the correct channel number.

(5) S.BUS setting: Rudder channel [default: 4ch]

Using the data [+] or [-] keys to set the correct channel number.

(6) S.BUS setting: Pitch channel [default: 6ch]

Using the data [+] or [-] keys to set the correct channel number.

(7) Rotor head gain: AIL and ELE gain channel [default: 9ch]

“RotHd.GN” to a channel will allow the Rotor head gain to be adjusted via the TX. If you are using a

6CH or less TX, setting “RotHd.Gn” to “INH” will then default the gain to “BaseGain” in the Flight Tun-

ing menu. Suggested setting and default is CH9.

(12) S.BUS data reset

This resets the S.BUS channel assignments back to the defaults. Press the data [+] key and [Exec

??] will be displayed as a conﬁrmation. Press data [+] to conﬁrm the reset back to the default set-

tings.

(9) S.BUS setting: RPM channel [default: 7ch]

Using the data [+] or [-] keys to set the correct channel number.

(10) S.BUS setting: GOV. on/off channel [default: 8ch]

Using the data [+] or [-] keys to set the correct channel number.

(11) S.BUS setting: Conditionon change channel [default: DG1]

Using the data [+] or [-] keys to set the correct channel number.

(8) S.BUS setting: RUD gain channel [default: 5ch]

Using the data [+] or [-] keys to set the correct channel number.

Push DATA

+/– key

Push MODE

+/– key

SWASH SERVO INSTALLATION AND SETUP

The CGY750 supports 6 different swash plate types as shown below.

ELE

PIT AIL

H3-120

ELE

PIT AIL

H3-140

ELE

PIT AIL

H3-90

ELE2

ELE

PIT AIL

H4-00

ELE2

FRONT

ELE

PIT

AIL

H4-45

ELE

PIT AIL

Normal

3. Initially the AIL and ELE gains should be set to 60% and the operating

mode should be set to [NOR]. Once the trim process has been completed,

the ight mode should be changed over to [AVCS]. When the AIL and

ELE gyros are in CMT mode, [NOR] versus [AVCS] may be selected

in the gyro menu in the transmitter (Futaba transmitters). Alternatively,

[NOR] versus [AVCS] may be manually selected in the CGY750.

Setting the CGY750 gains by using endpoints or manual adjust-

ments

1. If your transmitter does not support the remote gain adjustment it is still

possible to use spare channel on the transmitter to make the adjustments.

Assign unused channel (verify that these channels are not assigned or

operated by a switch or dial) within the transmitter. Set the [S.BUS.

Basic] → “RotHd.Gn” channels to the appropriate channel. Use the end

point adjustment within your transmitter for these channels to make the

gain adjustments and the reverse function within the transmitter to set the

mode [AVCS/NOR]. Conditions with the transmitter may also be used

to achieve different gains based upon ight modes. Please refer to your

transmitter’s instruction manual for further details.

Manual gain adjustment

1. If your setup does not leave any channels free or if your transmitter does

not support auxiliary gain adjustment, then it is possible to adjust the gain

manually within the CGY750. Set both the [S.BUS].Basic → RotHd.

Gn to [INH]. The gain adjustments are now made by entering the [Flight

Tuning] → Base Gain and pressing the data [+] or [-] keys.

Finishing the setup:

Using the Remote Gain Functions (roll, pitch and yaw)

1. Some Futaba transmitters contain auxiliary gain functions for aileron,

elevator and yaw. Please refer to your transmitter’s instruction manual.

Assign the GYR, GYR(AIL) and GYR(ELE) channels within the trans-

mitter. Within the CGY750 [S.BUS] Basic menu→Rotor Head Gyro Gain

“RotHd.Gn” – In the SBUS menu assigning “RotHd.GN” to a channel

will allow the Rotor head gain to be adjusted via the TX. If you are using

a 6CH or less TX, setting “RotHd.Gn” to “INH” will then default the gain

to “BaseGain” in the Flight Tuning menu. Suggested setting and default

is CH9. Tail Rotor Gain “RGn” – In the SBUS menu assigning “RGn” to

a free TX channel will allow for the tail rotor gain to be adjusted via the

TX. Suggested setting and default is CH5.

2. The gyro function within your transmitter should list all three gain chan-

nels. Adjustments can be made from within this function. The gyro func-

tion can usually be assigned to various switches or conditions to offer

greater adjustability. Please refer to your transmitter’s instruction manual

for further details.

WARNING

Verify that the gyro compensates in the correct direction for all

three axes before ﬂight. If the compensation direction is incorrect,

the model will roll, flip, or pirouette uncontrollably even before it

leaves the ground.

AILERON / ELEVATOR GYRO SETUP

Swash Servo installation

Determine which of the swash plate types shown match your helicopter

and install the swash plate servos per the diagram and per your helicop-

ter’s instruction manual.

Your transmitter should be reset to the default settings and the swash plate

type selected with the transmitter should be set to Normal (H-1) or single

servo mode. All CCPM mixing is set up and handled with the CGY750,

and the transmitter functions should not be used. The expo function and

dual rates can be used with the transmitter but everything related to the

CCPM mixing should be set up and handled by the CGY750. Set your

transmitter AFR, ATV and D/R (Swash functions) to 100% initially for

setup, and all subtrims should be set to 0.

Power up your transmitter and helicopter. Allow the CGY750 to initial-

ize. Use the CGY750 [SWASHset Basic].

Navigate to the Servo Type parameter on the CGY750 and select the servo

type that matches your servo manufacturer’s recommendations. If there

is any doubt, select the analog servo type to prevent damaging the servos

and check with your servo’s manufacturer to determine the proper type.

Navigate to the [SWASHset Basic] AIL.Ntr setting at this time. The

AIL,ELE, or PIT.Ntr setting screens will each disable the gyros and cause

the cyclic servos to remain in the center position. If you are using an

electric motor, then it will be necessary to remove the pinion gear now or

disconnect the motor from the ESC. Once you are certain that the drive

motor cannot apply power to the main rotor blades, temporarily install

servo arms onto the servos. Slowly move the collective stick towards

positive collective and verify that each servo is moving the proper direc-

tion to increase collective pitch. If the servos do not move in unison to

maintain a level swashplate with a collective pitch input, choose another

servo combination option from the ServoDir Comb# menu.

Once the servos are operating in the correct direction for the collective

control (positive and negative), the next step is to slowly move the col-

lective stick to the center position (verify within your transmitter’s servo

Display or Monitor function if possible). This will be considered the 0

collective position for setup. Temporarily install the servo arms onto the

cyclic servos and ensure that the servos are perfectly level. Small adjust-

ments can be made using the [SWASHset Basic] → AIL/ELE/PIT.Ntr

adjustment for each servo if necessary. Mount the linkage ball onto the

servo arm per your helicopter’s instruction manual and install the servo

retention screw onto each servo. Remember to use loctite on these screws

if your servos have metal output gears.

Move the forward / aft cyclic stick forward and verify that the swash plate

tilts forward. If the swash plate tilts the wrong direction, then it will be

necessary to reverse the sign of the [SWASHset Basic] ELE.Dir parameter

(for example +50 would become -50). Move the left / right cyclic stick to

the right and verify that the swash plate tilts to the right. If the swash plate

tilts left, then reverse the sign of the [SWASHset Basic] AIL.Dir param-

eter.If the collective pitch movement is opposite to the transmitter input

(positive stick input yields negative collective on the model), reverse the

direction using SWS.Dir PIT.

As a nal check, verify that the swash plate moves in the proper direction

per your stick movements for the roll, pitch and collective functions.

Navigate to the [SWASHset Basic] → SWS.Rate parameter. This will

disable the gyros and cause the servos to remain centered during set up.

Using a pitch gauge, ensure that the swash plate is perfectly level and that

the main rotor blades are at 0 degrees pitch when the collective stick is

centered. Make any mechanical adjustments as needed to achieve 0 de-

grees of pitch on both main rotor blades.

Rotate the main rotor blade with the pitch gauge so that it is aligned with

the tail boom. Apply full right cyclic on the transmitter and measure how

much pitch is on the blade. At least 9 degrees of cyclic pitch should be

set. Adjust the value of the [SWASHset] → Basic → SWS.Rate parameter

until at least 9 degrees of cyclic pitch is achieved.

OR…….Rotate the main rotor blade so that it is perpendicular to the tail

boom and apply full aft cyclic. Adjust the [SWASHset] → Basic → SWS.

Rate parameter until at least 9 degrees of cyclic is achieved.

Using the pitch gauge, adjust the collective range per your preference or

per your helicopter’s instruction manual.

All of the AFR, ATV and D/Rs for the cyclic and collective functions

within the radio should be set to 100%. At this point the basic setup is

complete, but it is necessary to set up the gyros and compensation direc-

tions before attempting to y the model.

Navigate to the AGy.Dir and EGy.Dir parameters in the [Swashset Basic]

menu.

These parameters control which direction the CGY750 (roll / pitch axis)

will compensate when the helicopter rolls (pitches). Pick the helicopter

up and roll the helicopter to the right. The CGY750 should compensate

by adding left cyclic to the swash plate. (Pick the helicopter up and rotate

the nose of the helicopter downward. The CGY750 should compensate by

adding aft cyclic to the swash plate.) If the CGY750 compensates in the

wrong direction, reverse the Compensation Direction setting by pressing

the DATA [+] or [-] key once.

Check the cyclic and collective movements for interactions and if any are

noted please refer to the Swash Plate Adjustment (Linkage Compensation)

procedure listed within the back of this manual. When using modern digi-

tal servos and with a proper setup, adjustments required will be minimal

if any at all. Sometimes mechanical design aws or mistakes within the

setup will cause interactions, and it is best to remove these before ight.

SWASH BASIC SETTING

The [SWASHset] →Basic menu contains all of the functions necessary to set up the swash plate servos and to set up all swash plate mixing functions.

(1) Start display

The editing menus are

scrolled by pushing the

MODE+ or – key

(4) Swash type [default: H3-120]

Select the swash plate type. Pushing the DATA+ or – key,

display shows the confirmation screen as xxx? Pushing

the SET key, the type is changed. Pushing the RSET key

or no operation the key for more than 1 second, the display

returns to previous setting. When the type is changed, all

swash parameter are reset.

WARNING

All of the swashplate param-

eters are reset when the swash

plate type is changed. Please

proceed through the entire setup

process before attempting to fly

the model.

WARNING

Read your servo instruction

sheet to determine the proper

servo settings. The servo type

parameter within the CGY750

must match the type of servo

you are using. Incorrect setting

may damage the CGY750 or the

servo. Incorrect setting may also

result in a loss of control during

ﬂight.

WARNING

If the operating mode has been

changed, then the CGY750 must

be reset by powering down and

then powering back up.

(3) Servo type [default: DG:285Hz]

This selects the swash servo types. There are four kinds of

the servo driving frequency selection, AN:70Hz, DG:95Hz,

DG:140Hz, DG285Hz. Previous version supported Ana-

log= AN: 70Hz and DG:1520= DG:285Hz only. All Futaba

digital servos can be worked with fastest DG:285Hz mode

but some of other brands servos do not support DG:285Hz

mode. In this case, select the proper servo driving frequen-

cy to meet the servos.

(2) Operation mode [default: Gyro+Gov]

This selects the operating mode of the CGY750.

[Gyro+Gov] Both the gyros and the governor are opera-

tional.

[Gyro+THR] The gyro is operational, and the governor is

disabled. The throttle channel from the receiver is passed

through to the [TH/E2] port on the CGY750.

[Gyro+H4] Must be selected when a [H4 xx] swash plate

type is selected. This disables the governor and throttle

servo output and the [TH/E2] port on the CGY750 is now

the second “Elevator” [E2] servo output.

(5) Swash servo direction setting [default: 1]

This parameter facilitates achieving proper swash servo movement electronic CCPM models

(eCCPM) In the H3-xx swash mode, three of the swash servos directions are changed by push-

ing the DATA[+] or DATA[-] key. Choose the combination number which produces level swashplate

travel with a collective pitch input from the transmitter. There are 8 combination choices for the

H3-xx swash mode. On H4-xx swash mode, there are 16 combination choices. After selecting the

combination number, aileron, elevator, pitch, and 2nd elevator servo parameters are automati-

cally set.

NOTE: Occassionally the aileron or elevator function directions are reversed even though collec-

tive pitch direction is correct. In this case, change the direction of the affected function using the

SWS.Dir parameter. The sign of its value will change from (+) to (-) or vice versa.

(6) Swash direction setting [default: +]

This selects the aileron, elevator and corrective pitch direction. Reverse the direction when the

stick movement and swash movement are opposite.

SWASH BASIC MAP. 1/2

(7) Servo neutral adjustment [default: 0µS ranges: -116~0~+116uS]

This menu is effectively a subtrim or individual neutral adjustment for each of the swash plate

servos. All servo arms should ﬁrst be positioned as perpendicularly as possible to the control

linkage with the collective stick positioned at 0 degrees collective (usually centered at half stick).

Only then and if needed should neutral adjustments be made with goal being to keep them as

small as possible. The ELE2 neutral adjustment only works if the H4-xx swash plate type has

been selected.

To use this function select the servo you would like to adjust and press the DATA [+] or [-] key to

position the servo as desired.

(Conﬁrmation screen)

Push DATA

+/– key

Push DATA

+/– key

Push DATA

+/– key

Push DATA

+/– key

Push MODE

+/– key

*It does not display, when Opr.mode is

Gyro+THR, and when SWASH-type is

H4-00/H4-45.

WARNING

Verify that the CGY750 compensates in the correct direction before ﬂight. If the compensation

direction is incorrect the model will roll and/or pitch uncontrollably at lift off.

SWASH BASIC SETTING

SWASH BASIC MAP. 2/2

(10) Swash ring [default: 130%]

This function is used to prevent binding of the swash plate servos when the transmitter control

stick is moved toward a corner (for example, full right and full aft cyclic). Press the Data [+] or [-]

key to adjust the value.

(12) Aileron direction memorizing

This function teaches the direction of aileron swashplate movement to the CGY750. Move the aile-

ron stick to RIGHT full and push the DATA [+] or [-] key. The RIGHT direction of the aileron data will

be saved to CGY750. To conﬁrm the setting, move the aileron stick to full RIGHT, and the “!” mark

will appear on the display. This procedure must be done for the F/F mixing to function correctly.

(13) Elevator direction memorizing

This function teaches the direction of elevator swashplate movement to the CGY750. Move the

elevator stick to full UP and push the DATA [+] or [-] key. The UP direction of the elevator data will

be saved to CGY750. For clariﬁcation purposes, UP refers to the direction the ELE stick

would be pulled to raise the nose of an upright model in ﬂight and which would yield an aft swash-

plate deﬂection. To conﬁrm the setting, move the elevator stick to full UP, and the “!” mark will ap-

pear on the display. This procedure must be done for the F/F mixing to function correctly.

(14) Pitch low memorizing [default: 1940µS]

This parameter saves the minimum collective pitch point into the CGY750. Move the collective

pitch stick to minimum pitch and push DATA [+] or [-] key. The minimum pitch signal will be saved

to the CGY750. The display shows “!” when the stick is at the saved point. The minimum collective

pitch setting must saved into the CGY750 for F/F mixing and/or linkage compensation to function

correctly

(8) Swash Rate (rate adjustment) [default: 50% ranges: 0~100%]

The Swash Rate settings are used to adjust the amount of throw allowed for roll (aileron) and pitch

(elevator). The one setting applies to both roll and pitch axes; they are not individually adjusted.

Use the Data [+] or [-] key to make an adjustment.

(DUAL RATES MUST BE 100) The base amount of cyclic pitch used to control the helicopter.

-Suggested amount of base cyclic pitch

●800 size – 10 degrees

●700 size – 9 degrees

●600 - 550 size – 8 degrees

●500 size 7 degrees

●450 and below- 6 degrees

(9) Pitch Rate (rate adjustment) [default: 50% ranges: 0~100%]

The [PIT.Rate] is the amount of collective pitch travel allowed, and this value will be similar to what

you may have traditionally used with a ﬂybarred helicopter. A good starting range for Sport, 3D

and F3C is +/-10 to +/-12 degrees. Beginners may want to change the negative collective pitch

value to -3 degrees instead of -10. Use the Data [+] or [-] key to make an adjustment. 50% ranges:

0~100%

(11) Aileron (roll)/ Elevator (Pitch) Gyro direction setting [default: Normal]

This parameter controls which direction the CGY750 (roll / pitch axis) will compensate when the

helicopter rolls (pitches). Pick the helicopter up and roll the helicopter to the right. The CGY750

should compensate by adding left cyclic to the swash plate. (Pick the helicopter up and rotate

the nose of the helicopter downward. The CGY750 should compensate by adding aft cyclic to the

swash plate.) If the CGY750 compensates in the wrong direction, then it will be necessary to re-

verse the Compensation Direction setting by pressing the [+] or [-] data key once.

Push MODE

+/– key

Push DATA

+/– key

Push DATA

+/– key

Push DATA

+/– key

(16) Pitch high memorizing [default: 1100µS]

This parameter saves the maximum collective pitch point into the CGY750. Move the collective

pitch stick to maximum pitch and push DATA [+] or [-] key. The maximum pitch signal will be saved

to the CGY750. The display shows “!” when the stick is at the saved point. The maximum collective

pitch setting must saved into the CGY750 for F/F mixing and/or linkage compensation to function

correctly.

(15) Pitch zero memorizing [default: 1520µS]

This parameter saves the zero collective pitch point into the CGY750. Move the collective pitch

stick to zero degrees pitch and push DATA [+] or [-] key. The zero degrees pitch signal will be

saved to the CGY750. The display shows “!” when the stick is at the saved point. The zero degrees

pitch setting must saved into the CGY750 for F/F mixing and/or linkage compensation to function

correctly.

When CondMenu is ON, this

changes into CondMenu.

When CondMenu is ON, this

changes into CondMenu.

When CondMenu is ON, this

changes into CondMenu.

SWASH DETAIL SETTING

The swash detail menu contains settings for pilots looking to achieve the absolute best performance from their gyro by precisely adjusting swashplate

movement so as to virtually eliminate adverse ight behavior during some maneuvers such as roll or loops/ips. Items (1) – (15) are used to keep the

swash plate level at high and low collective pitch and to reduce or eliminate PIT →cyclic and AIL →ELE and ELE →AIL cyclic eCCPM interac-

tions. To enter the detail menu, navigate to the Basic menu, press and hold the mode [+] key for one second and the menu will change from the Basic

to Detail. To exit the detail menu press and hold the mode [+] key for one second and the basic menu will be displayed.

SWASH DETAIL MAP

1/2

(1) Swash expert setting: start display

Use the mode [+] or [-] keys to navigate through the menu.

(2) PIT→AIL mixing rate [default: 100%] [ranges: 30% ~ 150%]

Going from MID to HIGH and MID to LOW pitch check that the swash plate is traveling flat

throughout the entire span. Using the (+/-) Data keys to level the swash plate on the aileron axis

to the middle point by raising or lowing the aileron servo.

(3) PIT→ELE mixing rate [default: 100%] [ranges: 30% ~ 150%]

Going from MID to HIGH and MID to LOW pitch check that the swash plate is traveling ﬂt though-

out the entire span. Using the (+/-) Data keys to level the swashplate on the elevator axis to the

middle swash position by raising or lowering the elevator servo.

(5) AIL→PIT mixing rate [default: 100%] [ranges: 30% ~ 150%]

At middle collective pitch check that during right to left and left to right aileron action the swash

plate is staying level on the elevator and collective pitch axis. Is the swash plate in raising or falling

with aileron inputs, use the Data (+/-) key to raise or lower the swash plate to match the middle

point during aileron inputs.

(7) AIL→ELE2 mixing rate [default: 100%] [ranges: 30% ~ 150%]

This parameter adjusts the aileron to 2nd elevator mixing rate. The rate can be adjusted for left

and right directions individually. It is only available for H4-45 swash mode. It is only available for

H4-45 swash mode.

(10) ELE→ELE2 mixing rate [default: 100%] [ranges: 30% ~ 150%]

This parameter adjusts the elevator to 2nd elevator mixing rate. The rate can be adjusted for up

and down directions individually. It is only available for H4 swash mode. It is only available for H4

swash mode.

(8) ELE→PIT mixing rate [default: 50%(H3-120), 100%(except H3-120)] [ranges: 30% ~

150%]

At middle collective during back to forward elevator inputs check if the swash plate is raising or

lowering during the input. If it is moving use the Data (+/-) key to raise or lower the swash plate to

match the middle point during elevator inputs.

(9) ELE→AIL mixing rate [default: 50%(H3-120), 100%(except H3-120)] [ranges: 30% ~

150%]

At middle collective while moving the elevator back and forth check to make sure the aileron axis

is staying level. Use the Data (+/-) key to raise or lower to level the swash plate during full forward

and back elevator input.

(11) Linkage compensation aileron [default: 0%] [ranges: 0% ~ 100%]

At HIGH pitch, and LOW pitch check to make sure that the swash plate is staying level on the el-

evator and collective axis when using aileron inputs. If the swashplate is raising or falling, use the

Data (+/-) key to keep the swash plate position the same as middle during aileron inputs.

Note – check all four directions: high/right; high/left; low/right; low/left

(4) PIT→ELE2 mixing rate [default: 100%] [ranges: 30% ~ 150%]

This parameter adjusts the pitch to 2nd elevator mixing rate. The rates can both be adjusted indi-

vidually for both full high and low collective positions. It is only available at H4 swash mode.

(6) AIL→ELE mixing rate [default: 100%] [ranges: 30% ~ 150%]

This parameter adjusts the aileron to elevator mixing rate. The rate can be adjusted for left and

right directions individually. It is only available for H4-45 swash mode.

(12) Compensation direction of the aileron [default: plus]

If the above Data (+/-) correction from 0-100 is NOT in the correct compensation direction, change

the value from PLUS or MINUS using the Data (+/-) key.

Push DATA

+/– key

Push MODE

+/– key

(16) Swash rotation [default: 0 deg] [ranges: -90 deg ~ +90 deg ]

Using the Data (+/-) key electronically add rotor head phasing to the swash plate controls. If possible,

it is recommended to use mechanical phasing adjustment, but if the rotor head does not allow this and

you feel that the model is NOT ﬂying axially on each control input, using this function can be used to

adjust the pure reaction of each axis in ﬂight. (Typically advanced phasing on clockwise rotor disk –

and a slight clockwise increase in swashplate alignment vs rotor axle – is used to create a axial reac-

tion, vice versa for a counterclockwise rotor disk model.)

(17) Data reset

This resets all of the Swashplate parameters back to the default values. Press the data [+] key

once, and [Exec ??] is shown as a conﬁrmation. Press the data [+] key again to conﬁrm the op-

eration and all of the gyro parameters will be reset.

SWASH DETAIL MAP

2/2

Rrturn to SWASH EXPERT MAP. 1/2

SWASH Detail SETTING

Push DATA

+/– key

Push MODE

+/– key

(15) Speed compensation [default: 50%(H3-120), 0%(except H3-120)] [ranges: 0% ~ 100%]

For 120 degree CCPM all servos do not travel the same distance on elevator input. After setting the

ELE-PIT and ELE-AIL parameters if during FAST movement of the elevator axis the swash plate is

not staying level, use the Data (+/-) key to match all servo speeds (+ will slow the elevator servo – will

reduce speed comp on elevator servo)

(14) Compensation direction of the elevator [default: plus]

If the above Data (+/-) correction from 0-100 is NOT in the correct compensation direction, change the

value from PLUS or MINUS using the Data (+/-) key.

Push DATA

+/– key

(13) Linkage compensation elevator [default: 0%] [ranges: 0% ~ 100%]

At HIGH pitch, and LOW pitch check to make sure that the swash plate is staying level on the ai-

leron and collective axis when using elevator inputs. If the swashplate is raising or falling, use the

Data (+/-) key to keep the swash plate position the same as middle during elevator inputs.

Note – check all four directions: high/back; high/forward; low/back; low/forward.

The following section describes in detail the adjustment of the Link-

age Compensation Menu to virtually eliminate an interactions present

in the eCCPM model.

*Prior to making any adjustments within this menu, the aileron, elevator and

pitch movement should be set to full travel in the transmitter (AFR/dual rates

set to 100%).

Pitch calibration (This should be set prior to the compensation process)

This parameter reads the collective pitch operation ranges to the CGY750.

Move the collective stick to center position (Pitch zero point). Open the

Pit.Zero on the SWASHset Expert menu and push the set button. The pitch

zero point is memorized to the CGY750.

Move the collective stick to minimum position. Open the Pit.Low menu

and push the set button. The minimum pitch position is memorized.

Move the collective stick to maximum position. Open the Pit.High menu

and push the set button. The maximum pitch position is memorized.

Pitch movement calibration

Make sure the swash plate is level when the collective stick is center posi-

tion at rst. Adjust the length of the linkage rods so that the swash plate is

level.

Move the collective stick to maximum position. Make sure if the swash

plate is level by adjust if needed using the PIT →AIL and/or PIT →ELE

mixing rate in the SWASHset Expert menu. Move the collective stick to

minimum position and once again use the mixing rates to achieve a level

swashplate.

Aileron movement calibration

Move the collective stick to center position. Move the aileron stick right

and left.

When a left or right AIL command is input, you may observe an

AIL →PIT interaction. Adjust the AIL →PIT mixing rate in the

SWASHset Expert menu to minimize the interaction. The mixer should be

adjusted for both left and right AIL directions.

LINKAGE COMPENSATION

Move the collective stick to the maximum position. Open the SWcp.AIL

on the SWASHset Expert menu. Move the aileron stick left and right.

Adjust the SWcp.AIL rate in the SWASHset Expert menu to be minimize

any interaction present similar to those observed for AIL inputs at half

collective.

If the interaction is increased when increasing the SWcp.AIL rate, the

compensation direction is reversed. Open the CpA.Dir menu and set the

direction to minus.

Mixing rates for both left and right aileron should be adjusted. Move the

collective stick to minimum position. Adjust SWcp.AIL rate the same as

was done for maximum collective pitch.

Elevator movement calibration

Move the collective stick to the center position. Move the elevator stick

up and down.

Adjust the ELE →PIT and/or ELE →AIL mixing rates in the SWASH-

set Expert menu to minimize any observed interactions. When an UP or

DOWN ELE command is input, you may observe an ELE →AIL interac-

tion. You can see this interaction, if present, by precisely positioning the

main rotor blades in line with the tail boom. When an ELE command is

input, adjust the ELE →AIL mixing rate until the blades do not move.

The mixing rates should be adjusted for both up and down directions.

Move the collective stick to maximum position. Open the SWcp.ELE in

the SWASHset Expert menu. Move the elevator stick up and down. Adjust

the SWcp.ELE rate in the SWASHset Expert menu to minimize the inter-

action between ele input and pit and/or ail.

In case of the interaction is increased when increasing the SWcp.ELE rate,

the compensation direction is reversed. Open the CpE.Dir menu and set

the direction to minus. Mixing rates for up and down elevator should be

adjusted. Move the collective stick to minimum position. Adjust SWcp.

ELE rate same as was done for maximum collective pitch.

Open the SpeedCmp on the SWASHset Expert menu. Move the eleva-

tor stick up and down quickly and look for what is best described as a

ELE →PIT interaction or “wiggle” in the swashplate. The faster your ser-

vos, the less the wiggle. Adjust the SpeedCmp rate as needed to minimize

this interaction.

The [Flight Tuning] → This menu contains all of the functions necessary to set up the CGY750 roll / pitch axis for operation.

(1) Start display

The editing menus are scrolled by pushing the MODE+ or – key.

(2) Gyro base gain setting [default: 100% ranges: 0~150%]

This sets the Cyclic Gyro Base Gain. If the aileron and elevator Gain Channels are set to [INH]

within the CGY750 [S.BUS]->Basic setting menu, then the remote transmitter gain adjust-

ment is not available. Thus the actual working gain for the cyclic gyros is set by using data [+]

or [-] keys within this parameter.

Set to 100, a TX Gain value of 100% will display 100% on the CGY750. If a pilot is in need

of more gain, base gain can be increased to allow the gain on the CGY750 to be higher than

100%.

Note – if using a 6CH or less TX base gain is equivalent to the rotor head gain and can be

adjusted manually on the gyro instead of via TX.

(3) Cyclic rate setting [default: 300d/s ranges: 100~500d/s]

Cyclic rate sets the maximum cyclic pitch and roll rate (d/s) as limited by the model’s ability

to reach that set rate. Pitch and roll rates are set together with this single parameter.

(4) Exponential [default: -20% ranges: -100~0~+100%]

Tune the exponential as desired to soften or sharpen the feel of the cyclic controls around

center stick. NEGATIVE values soften control feel; POSITIVE values sharpen control

feel. Note that any exponential present in the TRANSMITTER adds to the value set in the

CGY750. It is suggested that the exponential function in the CGY750 be used primarily to

tune for a linear control feel, and that has been the goal of the default setting. From there if

the pilot wishes to soften or sharpen the feel of the model around center cyclic stick, then

the transmitter’s exponential function would best be used.

(8) Elevator pre compensation [default: 0 ranges: 0~100%]

On a clockwise rotating disk naturally the helicopter will want to pull the nose towards the

rotor disk with positive blade pitch and push the nose away with negative pitch. In an in-

stance of a slower servo set-up or larger (heavier) rotor blades, a small amount of elevator

pre compensation may be needed to keep the nose of the helicopter ﬂat at all times during

collective pitch changes. In MOST cases with helicopter high speed servos and standard 3D

rotor blades this function is not needed. If you do notice a slight tendency that the nose is

trying to lift or fall, increasing ELE COMP will reduce the chance of this ﬂight behavior.

(9) High pitch authority [default: 0% ranges: 0~100%]

When a rotor blades angle of attack is increased, the rotor blade becomes less reactive, in

turn the helicopter might not feel as reactive at high pitch angles. If you want to increase the

reaction of the cyclic during loaded and high pitch maneuvers, HP AUTH will increase con-

trol authority and can be used to make the helicopter feel more linear under loading. Some

helicopters with direct link CCPM may use this to increase stability at high collective pitch

ﬂying as well. If a helicopter feels good for normal ﬂying, but not the same during loaded

situations, HP Authority can be used to make it feel more linear. If HP Authority is set very

high, the helicopter will feel more aggressive at high pitch than around neutral.

FLIGHT TUNING MAP

FLIGHT TUNING MENU DEFINITIONS AND ADJUSTMENT

Push MODE

+/– key

(5) Control Authority Aileron [default: 40% ranges: 0~100%]

Aileron Control Authority changes the rate at which the gyro will try to achieve the set angular

rate. A higher value will create a quicker accelerated reaction to a stick input to reach and

stabilize to the CYC Rate value; a lower value will reach the desired CYC Rate slower and

accelerate slower to the desired angular rate. (Note – Setting this value too high could lead

to a jerky feeling when making FAST stick corrections, a value too low will give you the

impression the model is not following the pilot’s stick inputs. Values of 30-70 are useful for most

helicopters.

(6) Control Authority Elevator [default: 40% ranges: 0~100%]

Elevator Control Authority changes the rate at which the gyro will try to achieve the set

angular rate. A higher value will create a quicker accelerated reaction to a stick input to

reach and stabilize to the CYC Rate value; a lower value will reach the desired CYC Rate

slower and accelerate slower to the desired angular rate. (Note – Setting this value too high

could lead to a jerky feeling when making FAST stick corrections, a value too low will give

you the impression the model is not following the pilot’s stick inputs. Values of 30-70 are

useful for most helicopters.

(7) Flight style [default: 50n ranges: 0~100n]

Increasing this value will create a more robotic reaction to the stick, leaving the pilot with the

impression that the model is locked into in a position after an input. It will also tend to have a

more calculated feeling when making inputs.

-Lowering the value will make the model feel more ﬂuid and easy to rotate with the stick in-

put. The model will feel a little more effortless during faster cyclic movements and direction

changes.

When CondMenu is ON, this

changes into CondMenu.

When CondMenu is ON, this

changes into CondMenu.

When CondMenu is ON, this

changes into CondMenu.

When CondMenu is ON, this

changes into CondMenu.

When CondMenu is ON, this

changes into CondMenu.

(3) Gyro direction [default: Normal]

This parameter controls which direction the CGY750 (yaw axis) will compensate when the

helicopter rotates. Hold the tail rotor linkage over the linkage ball on the servo, pick the

helicopter up by the main shaft and rotate the mechanics counter-clockwise. The CGY750

should compensate by adding clockwise rotation pitch to the tail rotor blades. If the CGY750

compensates by adding counter-clockwise rotation pitch to the tail rotor blades, then it will be

necessary to reverse the Compensation Direction setting by pressing the [+] or [-] data key.

(4) Limit setting [default: 100%, setting range: 50~150%]

When the CGY750 is in the Sv.Limit parameter the gyro will no longer operate and the tail

servo will always center when the tail rotor stick is released.

Always exit setup functions before attempting to ﬂy the model. Before each ﬂight al-

ways ensure that the gyros are operating and compensating in the correct direction.

The Servo Limit parameter within the CGY750 is used to set the mechanical limits for the tail

rotor servo. To obtain the best performance it is recommended to set the limit in the CGY750

to 100% for both directions and then adjust the servo arm length to set the mechanical end-

points. After that has been completed use the servo limit parameter to make small adjust-

ments that could not be made mechanically. Values between 90% and 110% are considered

optimal. Navigate to the [RUD.Gyro].Basic →Sv.Limit menu and slowly move the rudder

stick to the left or to the right maximum extent and use the data [+] or [-] key to increase or

decrease the maximum throw respectively. Ensure that the pitch slider does not exceed the

maximum extent of travel and cause binding.

(1) Start display

Use the mode [+] / [-] keys to

navigate the setting menus.

(2) Servo type [default: DG:1520]

Select the appropriate setting for the tail rotor

servo that you are using. Use the data [+] or [-]

key to choose from the following servo types:

DG1520, DG760 or Analog.

DG 760: BLS276SV, BLS251SB, BLS251, S9256, S9251

DG 1520: BLS254, BLS257, S9254, S9257

WARNING

Verify that the tail gyro compensates in the correct direction before ﬂight. If the compen-

sation direction is incorrect the model will pirouette uncontrollably at lift off.

WARNING

Read your servo instruction sheet to de-

termine the proper servo settings. The ser-

vo type parameter within the CGY750 must

match the type of servo you are using.

Incorrect setting may damage the CGY750

or the servo. Incorrect setting may also

result in a loss of control during ﬂight.

WARNING

When using the CGY750 for the ﬁrst time, or when making mechanical changes involving

throw, you must check and set the servo limits again to prevent binding.

RUD GYRO BASIC MAP

Follow step (4) [RUD.Gyro] → Sv.Limit to set the endpoint travel for each direction, en-

suring no binding is present.

RUDDER GYRO BASIC SETTING

Push DATA

+/– key

Push DATA

+/– key

Push MODE

+/– key

TAIL ROTOR GYRO SET UP AND RUDDER BASIC SETTING

Following your transmitter instructions, program your transmitter

as follows:

Enable the rudder gyro function within the transmitter.

Set the gyro mode to AVCS (GY) within the transmitter.

Set the remote gyro gain to 75% AVCS in the transmitter for the Normal

and Hold ight conditions and use 50% AVCS for all idle up conditions.

See “Setting the Gain” section later in this manual for more details.

Set the Tail Rotor ATV/EPA to 100% for both left and right.

Set D/R to 75% for both left and right. This will reduce the maximum

pirouette rate. Make adjustments to these values once the initial test ight

has been completed. Never use transmitter endpoint adjustments/ATV to

adjust pirouette rate.

It is recommended that you run 30% softening expo on the tail rotor channel.

WARNING

Do not connect the tail rotor servo to the gyro until the servo type

has been selected. Operating the servo using the incorrect setting may

damage the CGY750 or the servo.

The [RUD.Gyro].Basic menu contains all of the functions necessary

to setup the CGY750 tail gyro for operation.

Remove all of the servo arms (cyclic servos and tail rotor servo) and

linkages from the servo to prevent any possible damage. All analog

servos must also be disconnected until the servo type has been set up

within the CGY750. Power the system up and allow the CGY750 to

initialize.

Plug your tail rotor servo into the rudder slot in the CGY750 control

box. Install the servo arm, ensuring that the control ball linkage is

perfectly perpendicular to the tail rotor push rod. Conrm that the di-

rection of rudder servo movement with stick input is correct. Use your

transmitter’s servo reverse function if needed to achieve the correct

movement.

Install the servo arm screw and place the linkage onto the control ball

on the servo arm. Remember to use loctite on this screw if your servo

has a metal output/nal gear.

(5) Gyro working mode [default: CMT]

The available choices are CMT, Normal or AVCS. The CMT mode will allow you to select ei-

ther AVCS or Normal mode via the transmitter. In Normal mode the gyro will always operate

in Normal Rate Mode, and when AVCS it will always operate in AVCS Mode. Use the data [+]

or [-] key to select the desired working mode.

Push DATA

+/– key

(1) Start display

The editing menus are scrolled

by pushing the mode + or – key.

(2) Revolution setting [range: 700 ~ 4000

rpm]

Setting the main rotor revolution. This is calcu-

lated by engine revolution with the gear ratio of

the main shaft.

(3) Gear ratio [default: 8.00, range: 1 ~ 50]

Input the main rotor gear ratio by pushing the

data + or-key.

GOVERNOR BASIC SETTING

*It does not display, when Opr.mode is

Gyro+THR, and when SWASH-type is

H4-00/H4-45.

*It does not display, when Opr.mode is

Gyro+THR, and when SWASH-type is

H4-00/H4-45.

*It does not display, when Opr.

mode is Gyro+THR, and when

SWASH-type is H4-00/H4-45.

*It does not display, when Opr.

mode is Gyro+THR, and when

SWASH-type is H4-00/H4-45.

This menu sets the governor’s fundamental functions. The menu Servo

limit point setting must be set rst.

(5) Servo selection [default: Analog]

Select the throttle servo type. Digital servos of-

fer the best response. The type is changed by

pushing data + or – key.

(6) Stick switch [default: 30%]

The governor can be activated by throttle stick

position. Move the throttle stick to the desired

governor on position and push SET key, memo-

rizing that point. When you push the RSET key,

the function is inhibited. When the governor on/

off switch is inhibited, the stick switch is auto-

matically turned on.

(4) Pole number [default: 2p, range: 2p ~ 24p]

This function sets the motor pole count. This function is used when employing a direct phase

sensor attachment to a brushless motor lead. Input the motor pole count as speciﬁed by the

brushless motor manufacturer. When using any revolution sensor other than a direct phase sen-

sor type, set the pole number to 2p.

NOTE: The input signal range of the CGY750 is 0.0v-3.0v. Exceeding this voltage range may

cause damage to the CGY750.

GOVERNOR BASIC

MAP. 1/2

WARNING

This parameter must match the type of

servo you are using. Incorrect setting may

damage the CGY750 or the servo, possibly

resulting in a loss of control during ﬂight.

****Please see the Governor EXPERT menu in the ADVANCED TUNING SECTION at

the end of this manual for additional guidelines for governor use with electric models.

Push DATA

+/– key

Push DATA

– key

Push DATA

+ key

Push MODE

+/– key

GOVERNOR BASIC SETTING

OK NG

GOVERNOR BASIC

MAP. 2/2

(7) Governor on/off switch [default: Inhibit]

This function allows turning of the governor on

and off via a transmitter switch. Pushing the

SET (Data+) key activates the function. The on/

off direction is changed by pushing the SET key

again. The function is inhibited by pushing the

RSET (Data-) key.

(8) Servo limit point setting

Servo limit point setting deﬁnes the overall trav-

el range for the throttle servo. It is fundamental

for governor operation and must be set prior to

other functions. Servo limits must also be reset

when the throttle linkage or trim are changed.

For this setting, idling position is set ﬁrst, then

high position as guided by the display. Push

the data + or – key to memorize. “*Write*” is

displayed when the setting is completed. “Error”

is displayed when the setting position is out of

range (too little servo travel between low and

high throttle positions).

WARNING

When using the CGY750 for the ﬁrst time, or

when making changes in the throw of a servo

and its linkage, always perform the limit setting

operation.

(9) Limit point testing

Limit point setting conﬁrms the throttle servo position at idle and full throttle. Push data + or – key.

Throttle servo moves to the setting point indicated on the display.

(10) Revolution sensor testing

It tests the output level of the revolution sensor. Turn the engine by hand, and check the output

level. The display indicates the current level on left side numbers, maximum level on right side

numbers. The output level needs to be more than 60 % for correct governor operation.

(11) Sensor type

Select the type of governor sensor:

-Nitro (BPS-1 backplate; Magnet Type)

-Electric Phase Sensor “EPhase” (Electric motor using BLS Phase Sensor – SBS-01RB, or Cas-

tle ESC Phase sensor)

-1:1 Magnet “1:1 Mag” (Magnet type applied to helicopter part that turns at the same RPM as the

main rotor)

(12) Governor gain

Governor Gain. Too low of number the RPM will ﬂuctuate with collective pitch and cyclic changes.

Too high of gain the RPM will oscillate and possibly surge during ﬂight.

(13) Low limit set

Low RPM Limit sets the minimum amount of throttle that the governor will reduce to during an

over speed situation. Too low of value the engine could shut off or not recover power quickly dur-

ing the next collective movement. If the value is set too high the engine will speed up during the

over speed and cause the rotor head to also speed past the desired RPM.

Rrturn to GOVERNOR MAP. 1/2

*It does not display, when Opr.mode is

Gyro+THR, and when SWASH-type is

H4-00/H4-45.

*It does not display, when Opr.

mode is Gyro+THR, and when

SWASH-type is H4-00/H4-45.

*It does not display, when Opr.

mode is Gyro+THR, and when

SWASH-type is H4-00/H4-45.

Push DATA

+/– key

Push DATA

+/– key

Push DATA

+/– key

Push MODE

+/– key

Push DATA

+/– key

When CondMenu is ON, this

changes into CondMenu.

When CondMenu is ON, this

changes into CondMenu.

When CondMenu is ON, this

changes into CondMenu.

GOVERNOR SPEED SETTING

The CGY750’s rpm selection is accomplished by setting the channel in the section

(10) “Revolution channel” menu within the “S.BUS Basic Setting” to the gover-

nor speed setting channel of your system. When using an independent governor

on/off switch, activate the section (6) “Governor on/off switch” function within

the “Governor Basic Setting” section earlier in this manual.

Direct set by transmitter on Gov. mixing

When governor mixing is used to switch the RPM of the rotor head speed,

the head speed can be switched with each condition or the switch.

*For a description of the governor mixing, refer to your transmitter’s man-

ual.

Using by 3position switch

Set the RPM at each switch position in the “(2) Revolution setting” menu

within the “Governor Basic Setting” section earlier in this manual.

Speed setting precautions

• When the speed setting channel travel (EPA, ATV, AFR) is set to 20%

or less, points 1 and 3 cannot be set.

• The engine maximum speed range limits the maximum speed setting.

• Test ﬂy the helicopter with the governor turned off and tach the main

rotor R.P.M. while in horizontal ﬂight. This is the maximum R.P.M. that

can be achieved with the engine and pitch setup that you are using.

Please set the governor maximum speed to approximately 50 R.P.M.’s

less than max R.P.M. (Example: If 1800 R.P.M.’s is max, then set gov-

ernor to 1750)

• The maximum speed can be veriﬁed at the MAX. speed display. How-

ever, this value could reflect an unlocked main rotor condition and

would thus be inaccurate.

Reference

The transmitter ATV/EPA function can also be used to change the point 1 and

point 3 speed settings to a certain extent. The amount of this change is pro-

portional to the difference between the point 1 and point 3 set speed and the

point 2 set speed. For example, if point 1 is set to 1300rpm and point 2 is set

to 1500rpm, and the transmitter ATV is changed from 20 to 100%, the point 1

speed will change from 1460 to 1300rpm. The transmitter ATV function has

very little effect on the point 2 speed setting. The speed changes linearly on a

line connecting points 1, 2, and 3.

Speed

Point 3

Point 2

Point 1

Neutral

Speed setting

channel travel

Governor operation

The CGY750 operates from 700 to 4000rpm main rotor speed. However, the

engine must be running at the set speed. The CGY750 turns off the governor

when the engine is starting or idling.

* Governor operation: Operation that stabilizes the engine speed at the set

speed.

Condition of the governor to be on

For safety purposes, the governor is turned on when the conditions below are

satised.

The on/off switch conditions are set to off during power on.

The stick switch is in the on position when it is used.

The on/off switch is in the on position when it is used.

Setting speed is not off.

The engine speed exceeds to 60 % of the setting speed.

The speed sensor is working properly.

The following operations do not indicate trouble:

When engine speed rises above the set speed:

A near-vertical dive may cause the engine speed to exceed the set speed.

Throttle operation speed and ON/OFF point:

If throttle operation exceeds 60% of the set speed and the rotor speed rises

to the set value, the ON/OFF point may seem to differ with the operating

speed. Delay operation to smooth the switching operation causes this and

does not mean that the ON/OFF point has changed.

Deviation from set speed:

The CGY750 stabilizes the engine speed to within ±1% of the set speed. For

example, if the rotor R.P.M. is set to 1500rpm, the Rotor R.P.M. speed will

deviate about ±15rpm. However, this poses no problem from the standpoint

of practical use.

RECOMMENDED GYRO GAIN SETTINGS

Recommended gain settings:

Size Recommended Gyro Gain

AIL/ELE Gyro

450-550 50-60.00%

600-700 50-60.00%

750-more 50-60.00%

50% is a good starting point for rudder gain regardless of model size.

BEFORE FLIGHT CHECKLIST

ADJUSTMENTS DURING THE TEST FLIGHT

Always verify that the transmitter and Receiver batteries are fully charged.

Check the gyro mounting tape and ensure that it is in good condition.

Make sure the gyro is rmly mounted to the helicopter.

Verify that the gyro wiring has some slack in it and all wires are clear of

the main frame.

Power on the transmitter and receiver. Allow the gyro to initialize.

Check and verify that the servo type parameter is set correctly for the tail

rotor and cyclic servos.

Verify that all of the servo arm screws are installed.

Ensure that the cyclic and tail rotor servos do not bind when moved to the

full extent of the throw.

Verify that the gyro is operating in the correct mode [AVCS or Normal]

and that the gains are properly set.

Test all controls and verify that they move in the correct direction.

Verify that the gyro compensates in the correct direction for all three axis

before ight. If the compensation direction is incorrect the model will roll,

ip, or pirouette uncontrollably, at a very high rate.

WARNING

Always level the swashplate using the cyclic stick before applying

throttle and spooling the main rotor blades up. During takeoff small

corrections may be necessary. If you make large corrections while the

helicopter is on the ground, it may tip over since the helicopter is ﬁrmly

on the ground and the gyros are overcompensating due to the lack of

movement.

Some helicopters may have a tendency to resonate/shake during

spool up. Always leave the helicopter on the ground until this reso-

nance or shaking goes away. If this issue continues, it is recommend-

ed to try some rubber skid stops or take off from a softer surface such

as grass. Vibrations contribute to this ground resonance. Verify that

everything on your model is balanced correctly.

GOVERNOR OPERATION

WARNING

Safety reminder: Remember to conﬁgure your transmitter fail safe

settings for not only the throttle channel but also governor ON/OFF

channel to ensure the governor correctly disengages should the radio

enter fail safe.

* When the CGY750 is used with a ESC or BEC and a power switch is

not used there is a possibility that the intermittent connection as you

connect the ﬂight battery may cause the CGY750 initialization to fail.

Always ensure that the gyro has initialized properly by verifying that

the gyros are compensating as the helicopter is moved. It is recom-

mended to use a power switch on the power supply line to avoid this

possibility.

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