Futaba GYD 470 Rate Gyro for RC Drift Cars Instruction Manual

: June 8, 2024
: Futaba

Futaba GYD 470 Rate Gyro for RC Drift Cars

Futaba GYD 470 Rate Gyro for RC Drift Cars

Before using your new gyro, please read this manual thoroughly and use the gyro properly and safely. After reading this manual, store it in a safe place.

No part of this manual may be reproduced in any form without prior permission.
The contents of this manual are subject to change without prior notice.
Futaba is not liable for any potential damage (accidental or otherwise) that may occur after installation.

Features of GYD470

Dedicated RC Drift car setting
Vehicle straight-line and cornering performance can be increased without taking into account the effect of the road surface, etc.
Remote gain function and mode switching function
You can adjust gain from the transmitter (3 or more CH) by using the remote gain function. Gain can also be adjusted with the trimmer on the GYD470. The mode switching function allows AVCS/NORMAL gyro mode switching.
Integrated, compact, and light weight
Compact size（20.7×20.7x11mm）and light weight（3.7g）realized by high density mounting technology.
Easy setup
The GYD470 can be used immediately with minimum setup.
Supporting the S.BUS/S.BUS2 connection
Only one wire connection to the receiver can operate the GYD470.
Only for Futaba digital servo

Functions

Monitor LED display

Normal (Green)

Thank you for purchasing the GYD470 RC cars gyro. Compact and lightweight, the GYD470 is designed to control steering for RC Drift cars. If the transmitter has 3 or more channels (capable of 3CH adjustment) the gyro sensitivity can be adjusted from the transmitter. Features include simple set-up and S.BUS/S.BUS2 connectivity.

GYD470 Ratings:

(Integrated sensor type rate gyro)

Gyro sensor: MEMS vibrating structure gyro
Operating voltage: DC4.0 V to 8.4 V
Current drain: 30 mA (excluding a servo)
Operating temperature range: -10ºC to +45ºC
Dimensions: 20.7 x 20.7 x 11.0 mm (0.82 x 0.82 x 0.43 in) (except protrusion)
Weight: 3.7 g (0.13 oz)
Functions: Sensitivity trimmer. LED monitor. Servo selection (SR mode ON/OFF). S.BUS/S.BUS2 connection.

Set Contents

The following items are supplied with the GYD470:

GYD470
Mini screwdriver
Sensor tape
Extension cord
Nylon strap

WARNING
Failure to follow these safety precautions may result in severe injury to yourself and others.

Check that there is sufficient battery capacity.

Do not operate the model and transmitter steering wheel for about 3-5 seconds after turning on the GYD470 (When shared with the receiver).

GYD470 initialization and neutral position reading. The GYD470 is initialized when the power is turned on. The neutral position is also read at the same time. If initialization ends normally, the operator is informed by two repetitive movements of the servo to the left and right (a little).

Always check the direction of operation of the gyro.

Do not strike the gyro with a hard object. Do not drop it onto a concrete surface or other hard floor.

The sensor may become damaged during strong impacts.

Do not use trims or mixing.

All corrections are made by the gyro. Therefore, if trimming and mixing, are turned on, operation will be the same as deviating from the neutral position.

Do not use the GYD470 for applications other than RC cars.

This gyro is designed for RC cars only. Do not use it for other applications.

Analog servos cannot be used.

The use of analog servos may cause servo trouble

Do not place gyro near heating equipment (engine, motor, ESC, battery, servo, etc.).

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.

Connecting the GYD470

Gyro gain CH(Receiver)←connect→Port2(GYD470)
Remote gain effective. Trimmer(GYD470) becomes LIMIT.

Gyro gain CH(Receiver)←It does not connect→Port2(GYD470)
Remote gain is invalid. Trimmer(GYD470) becomes GAIN.

Connecting the GYD470 S.B Connecting the GYD470

S.BUS Connecting the GYD470

In S.BUS connection, the port 2 is not connected. Remote gain is still effective.

S.BUS Connecting the GYD470

Mounting to Chassis

Use the included double-sided sponge tape to firmly attach the gyro perpendicular to the control axis, at a position where there is as little vibration as possible. Make the wiring loose and bundle it with the included nylon strap so that it will not interfere with the rod.

Gyro mounting position
The direction of rotation fixed by the gyro can be any direction within 360° relative to the steering axis controlled by the gyro.

Gyro mounting position

Flat surface of the chassis where the sensor tape sticks easily. Mount the gyro level so that it is not tilted relative to the chassis.

Mounting to Chassis

Steering servo

Link the servo in accordance with the kit instruction manual. Adjust the linkage rod so that the trim amount is as small as possible. When using S.BUS servo, initialize a parameter. Make the servo operating range as wide as possible. Make the numerical value of EPA (ATV) equally in left and right.

SR mode

It is possible when using the S.BUS setting compatible transmitter to change the servo to “SR Mode” and improve the servo response. If the servo can’t be changed to SR mode, do not set the TX to SR mode.

SR mode

Adjustments

Setup before a run [ Remote gain use ]

Gain adjustments are carried out with a transmitter.
Follow this procedure when the port 2 of gyro and gain CH of the receiver are connected. (or with S.BUS connection)

Run the car in the gyro off (gyro gain 0%) and adjust the steering trim (sub trim).
Select the appropriate setting for the steering servo that you are using. Servo selection switch of GYD470 should be moved to SR mode ON or OFF.
*Do not use a normal digital servo in the SR servo mode (ON). The servo may be damaged. Use a normal digital servo in the SR servo mode (OFF).
Turn on your transmitter’s power. Set the gyro sensitivity to about 70% at the NORMAL or AVCS side in accordance with the transmitter instruction manual. The graph of the next page is referred to.
*Gyro sensitivity zero — LED OFF
AVCS side — LED red
NORMAL side — LED green
Make the gain tuning adjustment after running the car and noting the behavior.**
Receiver ON → The GYD470 requires 3-5 seconds to initialize when the power is turned on. Do not move the car and do not move the steering wheel during this initialization or the gyro may not initialize properly. Once the initialization process has been completed the steering servo will move (a little) several times indicating that the GYD470 is now ready for use. If the neutral has shifted, LED will blink orange. In that case, it reboots.
Move the steering wheel to the left and right and perform adjustment at the limit trimmer so that the servo operation is maximum without any bind of the control linkage or mechanical limits.
＜Limit Trimmer Adjustments＞
• Steering wheel to full

• Limit trimmer Adjustments

• It adjusts to the maximum operation of linkage.

Limit is symmetrical from the neutral position. Only proceed with the limit adjustment after completing the trim adjustment.
● Trimmer operation
Since this gyro is also very small, the adjustment trimmer is also a small part. Always operate the trimmer with the accessory mini screwdriver and without applying unreasonable force.
Using the gyro direction switch, adjust the gyro operating direction so that steering moves all the way to the right when the car is turned to the left. Be sure to set gyro operating direction correctly or the car will not run.
If the car is turned to the left by hand → steering goes out on the right

[ When remote gain function is off ]

Adjust the gyro sensitivity with the GYD470 trimmer.

If the port 2 of gyro is not connected, remote gain is automatically set to being inhibited. (S.BUS connection is excluded)
In this case, the limit trimmer is automatically changed to gyro sensitivity setting trimmer.
(Limit adjustment cannot be performed. A limit is fixed to 50 right and left.)

Select the appropriate setting for the steering servo that you are using. Servo selection switch of GYD470 should be moved to SR mode ON or OFF.
*Do not use a normal digital servo in the SR servo mode (ON). The servo may be damaged. Use a normal digital servo in the SR servo mode (OFF).
Gain trimmer halfway to the left : NOMAL(green) or right : AVCS (red) from the 70% point.
Receiver ON → The GYD470 requires 3-5 seconds to initialize when the power is turned on. Do not move the car and do not move the steering wheel during this initialization or the gyro may not initialize properly. Once the initialization process has been completed the steering servo will move (a little) several times indicating that the GYD470 is now ready for use. If the neutral has shifted, LED will blink orange. In that case, it reboots. Using the gyro direction switch, adjust the gyro’s operating direction so that steering moves all the way to the right when the car is turned to the left. Be sure to set the operating direction correctly or the car will not run.

Gyro Sensitivity and mode Switching

When the remote gain function is used, NORMAL and AVCS mode switching is performed in accordance with the direction of operation of the transmitter’s remote gain channel. At the + rate side, the AVCS mode is selected and at the – rate side, the NORMAL mode is selected. The sensitivity is changed by adjusting the end point rate.

When the remote gain function is not used, the clockwise direction from the center of the sensitivity setting trimmer is the AVCS mode and the counterclockwise direction is the NORMAL mode. At the center position the sensitivity becomes zero and when the trimmer is turned fully to the left or right, the sensitivity becomes 100%

The sensitivity setting criteria by end point is shown in the figure below.

Gyro Sensitivity and mode Switching

3CH (GAIN CH) is set up with reference to the manual of a transmitter. Neutral position becomes GAIN 0%. It is divided into AVCS side and NORMAL side. Check using the GYD470’s LED.

Gyro sensitivity zero — LED OFF
AVCS side — LED red
NORMAL side — LED green

When Port 2 is not used for gain, and SBUS/SBUS2 is not used, the trimmer works as the gain adjustment shown below.

Gyro Sensitivity and mode Switching

Tuning Adjustment

Actually drive the vehicle and adjust the gyro sensitivity.

Always re-trim with the gyro gain at 0.
In this state turn the receiver power OFF → ON. The neutral position is memorized. Steering trim must not be performed while the car is running.

AVCS / NORMAL Modes

The gyro has 2 operating modes: NORMAL mode and AVCS mode. In the AVCS mode, gyro control is firmer. The car will hold heading via the drivers commands. In NORMAL mode the gyro will try to counter steer, but still allow the car to drift regardless of previous heading. Because the feel of operation is different, choose your favorite mode.

AVCS

In case of the right slide ⇒Right steering control The gyro will try to get the car to grip in the drivers steering direction.

AVCS

NORMAL

In case of the right slide ⇒Left steering control The gyro will try to counter steer regardless of the angle of the car.

NORMAL

S.BUS System

Unlike conventional radio control systems, the S.BUS system sends operating signals from the receiver to a gyro or other S.BUS compatible device by data communication. The S.BUS compatible device executes only those parts of this data for the channels set by itself. For this reason multiple servos can be connected to the same signal line.
The S.BUS system requires a dedicated S.BUS receiver and S.BUS servo (gyro, etc.).

Symbols

Customer Support

FUTABA CORPORATION
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