Futaba GY520 User Manual
INSTRUCTION MANUAL
1M23N21902
YAW-AXIS STABILIZER FOR MODEL HELICOPTER
(RATE GYRO)
ABLE OF CONTENTS
T
• Precautions ----------------------------------------------------- 3
• Warranty and Repair Service (in U.S.A.) ------------------ 6
• Contents -------------------------------------------------------- 7
• Specifi cations -------------------------------------------------- 8
• Recommended Servos ---------------------------------------- 9
• Replacement and Optional Items --------------------------- 9
• Function and Connection Diagram ----------------------- 10
• LED Indicator Description ----------------------------------11
• Introduction ---------------------------------------------------11
• Mechanics Preparation ------------------------------------- 12
• GY520 Installation ------------------------------------------ 13
• Connecting the GY520 to your Receiver ---------------- 15
• GY520 Programming --------------------------------------- 16
• Tail Rotor Servo Installation and Setup ------------------ 25
• Before Flight Checklist ------------------------------------- 28
• Adjustments During the Test Flight ---------------------- 29
• Using Normal Mode ---------------------------------------- 30
• Setting the Gain --------------------------------------------- 31
Technical updates and additional programming
examples can be found at:
www.futaba-rc.com/faq
2
RECAUTIONS
P
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.
• The GY520 requires 5-10 seconds to initialize when the
power is turned on. Do not move the helicopter and do
not move the tail rotor stick during this initialization
or the gyro may not initialize properly. Once the
initialization process is complete, the tail rotor servo will
move to the left extent and then to the right extent. This
will occur twice. The indicator light will change to solid
blue for AVCS Mode or solid red for Normal Mode.
BEFORE EACH FLIGHT:
• Always check the transmitter and receiver battery voltage to
ensure they have enough remaining capacity to complete
the fl ight.
• Verify that the gyro is operating correctly.
• Verify that the gyro compensates in the correct direction
before flight. If the compensation direction is incorrect the
model will pirouette uncontrollably, at a very high rate.
• 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 helicopter.
• The servo type parameter within the GY520 must match the
type of servo you are using. Incorrect setting may damage
the GY520 or the servo, possibly resulting in a loss of control
during fl ight.
3
RECAUTIONS
P
• Only use the GY520 with a 2.4GHz system such as the
Futaba FASST™ system, or a PCM system. Use with a FM
system is strongly discouraged since interference can
cause serious operational problems. In addition to this
the latest high performance tail rotor servos generate
electrical noise which may also cause interference to an
FM receiver.
• 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 GY520.
This may affect the overall performance of the gyro.
• Always allow the gyro to adjust to the surrounding
environmental temperature before fl ight. A large temperature
change during use will cause drift and other operational issues.
• The GY520 uses a conductive resin case to prevent
electromagnetic interference. Do not allow anything to touch
the gyro case as it may cause a short circuit.
• 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 within one second. The tail
rotor servo will center indicating that the new center position
has been memorized.
• When the GY520 is used in Normal Mode, tail rotor
compensation or revolution mixing must be used within
the transmitter.
4
RECAUTIONS
P
• When operating the gyro in AVCS Mode, all tail rotor
compensation and revolution mixing must be disabled and
any tail rotor offsets for fl ight modes must be disabled.
• When the GY520 is operated in AVCS mode the tail rotor
servo will not center when the stick is released. This is
normal operation for AVCS mode. The servo may also move
to the extent while the model is being carried out to the fl ight
line. Before take off, you must center the tail rotor servo 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. You
can also visually center the tail rotor pitch slider by using the
tail rotor stick.
• Do not drop the GY520 onto a hard surface or subject the
GY520 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
hobby dealer.
• Always exit programming mode before attempting to fl y
the model.
• Do not use any type of priority mixing or gain reduction
mixing on the GY520.
5
ARRANTY & REPAIR SERVICE (IN U.S.A.)
W
If any diffi culties are encountered while setting up or operating
your GY520, please consult the instruction manual fi rst. For
further assistance 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 diffi 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 Address below:
Futaba Service Center
3002 N Apollo Drive Suite 1
Champaign, IL 61822
6
ONTENTS
o
C
GY520 Gyro
Y520 Gyr
Adjustment Screwdriver
Extensions
Tail Rotor Extension (Black)
Mounting Pads
2mm Thick (two)
3mm Thick (two)
Damping and
Shield Plate
Gain Extension (Red)
7
PECIFICATIONS
S
Width: 0.79in [20mm]
Length: 0.79in [20mm]
Height: 0.39in [10mm]
Weight: 0.243oz [6.9g]
Maximum* Operating Voltage: 3.8V to 6.0V DC (Gyro only)
Current Drain: 40mA (Gyro only)
Selectable Servo Frame Rate: 70Hz, 280Hz and 560Hz
Center Pulse Width: 1520 S (70Hz & 280Hz Frame Rate)
Flight Mode: User selectable F3C or 3D
Operating Temperature: 14ºF to 113ºF
Control System: Advanced PID control
Sensor: MEMS vibrating structure gyro
Angular Velocity Range: ±800 Degrees Per Second
*The maximum operating voltage listed only applies to the GY520.
Always verify that your receiver, servos, tail rotor servo, governor, switch
and any other electronic components used in your installation are capable
of operating at the voltage you plan to use.
760 S (560Hz Frame Rate)
8
ECOMMENDED SERVOS
R
250 – 450 Sized Electric
Futaba S9257 EP Heli Digital (280Hz/1520μS): FUTM0667
.30 – .91 Size Helicopters
Futaba S9254 Digital Servo Heli (280Hz/1520μS): FUTM0224
Futaba S9256 Digital Hi Speed (560Hz/760μS): FUTM0226
Futaba BLS251 Brushless Heli Servo (560Hz/760μS): FUTM0521
EPLACEMENT & OPTIONAL ITEMS
R
Futaba PC Interface CIU-2 for GY520: FUTM0951
FSH64 GY520 Extension 200 mm (2): FUTM4664
FSH65 GY520 Extension 350 mm (2): FUTM4665
FSH66 GY520 Extension 55 mm (2): FUTM4666
FSH67 GY520 Extension 80 mm (2): FUTM4667
FSH68 GY520 Extension 130 mm (2): FUTM4668
FSH69 GY520 Mounting Pad 2x22x22 mm (10): FUTM4669
FSH70 GY520 Mounting Pad 3x22x22 mm (10): FUTM4670
FSH71 GY520 Shield Plate 1x22x22 mm (3): FUTM4671
9
UNCTIONS & CONNECTIONS
F
LED Indicator
Button
Tail Rotor Servo
10
Gain
Channel
Tail Rotor
Channel
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