FUTABA GY601 Instruction Manual
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FUTABA GY601 Instruction Manual

FUTABA GY601 Instruction Manual

Avcs gyro yaw-axis stabilizer for model helicopter
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AVCS GYRO
GY601
I
M
NSTRUCTION
ANUAL
YAW-AXIS STABILIZER FOR MODEL HELICOPTER
(RATE GYRO)

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Summary of Contents for FUTABA GY601

  • Page 1 AVCS GYRO GY601 NSTRUCTION ANUAL YAW-AXIS STABILIZER FOR MODEL HELICOPTER (RATE GYRO)
  • Page 2 •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. •This manual has been carefully written. Please write to Futaba if you feel that any corrections or clarifications should be made.

  • Page 3: Table Of Contents

    DATA SETTING •Name and Function of Each Part ------------------------ 12 •LCD Display and Edit Keys ----------------------------- 13 •Function Map ---------------------------------------------- 14 •GY601 Functions Setting -------------------------------- 15 •Remote Gain Function ------------------------------------ 21 •Initialization ------------------------------------------------ 30 INSTALLATION AND ADJUSTMENT •Installing to Fuselage ------------------------------------- 32 •Flight Adjustments ---------------------------------------- 37...

  • Page 4: For Safety

    If a connector works loose due to vibration during flight, control may be lost and result in a dangerous situation. Always use the GY601 with a PCM proportional system. Using the GY601 with an FM proportional system, when noise enters, the wrong neutral position may be memorized.
  • Page 5 Mount the sensor and control amp so that metals or other conductive objects do not touch these cases. The GY601 uses a conductive resin case to reduce electromagnetic interfer- ence. Because the surface of the case is conductive, metal objects may cause a short circuit.

  • Page 6: Fuselage Maintenance Precautions

    Never use the transmitter rudder trim in the AVCS mode. When the rudder is trimmed during flight, the neutral position will change. When using the GY601 in the AVCS mode, set revolution mixing to OFF. Fuselage Maintenance Precautions Use a tale rotor drive tube or other part with a high torsion perfor- mance for the tail drive.

  • Page 7: S9251 Usage Precautions

    S9251 Usage Precautions Do not use the S9251 with applications other than the GY601 gyro. The S9251 is designed to be used with the GY601 only, and will not operate in other applications. Trouble may also occur. Immediately after flight, do not touch the S9251 case.

  • Page 8: Before Use

    EFORE EFORE Set Contents After unpacking the GY601 set, first check if the following parts are provided: GY601 control amp (x1) Sensor tape (x3) GY601 sensor (x1) Mini screwdriver (x1) S9251 servo (x1) (Only a set w/servo)

  • Page 9: Avcs Gyro

    EFORE AVCS Gyro Differences Between AVCS Gyro and Conventional Gyro Compared to a convention gyro, the AVCS gyro has a substantially im- proved tail control capacity. Gyro operation also differs from that of conventional systems in a number of ways. The following sequentially describes the conventional gyro and the AVCS gyro.
  • Page 10 The AVCS system requires a high-precision angular velocity sensor. The GY601 realizes a high-precision angular velocity detection function and extremely small output drift by using a new type of gyro sensor. This minimizes rudder neutral position drift during flight and eliminates the need to trim the rudder during flight.
  • Page 11 •In the AVCS mode, the gyro automatically trims the rudder so that linkage changes cannot be verified. Initially, the GY601 trims the rudder by flying in the Normal mode to take the rudder linkage neutral position.

  • Page 12: Data Setting

    ETTING ETTING Name and Function of Each Part GY601 control amp LCD display Displays the set data. (8 characters X 1 line) (Input/output terminals) Gyro sensor input Rudder servo output (Receiver connectors) Edit keys Remote gain input Used when setting data.

  • Page 13: Lcd Display And Edit Keys

    ETTING LCD Display and Edit Keys LCD display Set data display and operation status monitoring are possible. Edit keys Setup screen call The setup screens can be sequen- tially called with the FUNC+ or FUNC- key. For the order in which the setup screens are called, see the function map.

  • Page 14: Function Map

    ETTING Function Map Power ON FUNC ”-” key Normal screen display (P15) FUNC ”+” key Power on screen display Gyro Reverse (P15) (P16) Gyro Gain Adjustment (P16) Rudder Control Gain (P17) Control Delay I (P17) Control Delay D (P17) Gain Tracking (P18) Operation Mode Setting (P18)

  • Page 15: Gy601 Functions Setting

    ETTING GY601 Functions Setting Power on screen display When the gyro power is turned on after the transmitter power was turned on, -Hello- blinks for about three seconds to initialize the data inside the gyro. During this period, do not move the transmitter rudder stick or the helicopter.
  • Page 16 ETTING Gyro Reverse Initial value: NOR Sets the gyro operation direction. NOR or REV can be selected. Set so that when the helicopter is banked right, left correction rudder is applied and when the helicopter is banked left, right correction rudder is applied.
  • Page 17 ETTING Rudder Control Gain Initial value : ACG: 120%, NCG: 130% Adjusts the rudder stick operation gain. Setting range is 10% to 250%. AVCS and NOR mode gain can be set independently. In the AVCS mode, ACG is displayed and in the NOR mode, NCG is displayed. The display automatically changes to A or B according to the direction of the rudder stick and the gain of each direction can be set.
  • Page 18 NOR mode. In the NOR mode, the GY601 operates the same as an ordinary gyro. In the AVC mode, the GY601 always operates in the AVCS mode. In the CM mode, the GY601 can be used in both the AVCS and NOR modes.
  • Page 19 ETTING Flight mode Initial value : F3C Switches the flight mode. Settings are F3C or 3D. The F3C mode emphasizes tail suppression and stop. The 3D mode slightly sacrifices tail suppression and stop, but lets you control pirouette speed completely proportional with the rudder stick operation amount and is suitable for 3D flight.
  • Page 20 200% and limit setting is easy. A or B is displayed for the right and left directions. Note: When this screen is displayed, the GY601 does not operate as a gyro. To check operation, return to the initial screen, etc.

  • Page 21: Remote Gain Function

    Normal mode sensitivity adjustment and operation mode switching from the transmitter. The channel used here is called the "remote gain channel". (Channel 5 is used.) (Remote Gain Function) Receiver Transmitter GY601 Gain/Mode Selection Mode Settings • CH5 switch • Normal mode (NOR) • Idle-Up switch (T8Usuper) •...
  • Page 22 The Gyro Sense Mixing (GYR) function lets operator perform two-point gain adjustment at each condition. Set the sensitivity at all conditions. [GY601 Settings] Select the gyro operation mode at the GY601 Mode screen. (AVC, NOR, or CMT) [Transmitter Settings] ATV function: Adjust both the RATE A and RATE B rates to 100% at the transmitter 5ch(GYR) ATV function setup screen.
  • Page 23 Actual gain The GY601 sensitivity is 0% at 50%. When set over 50%, the GY601 operates in the AVCS mode and when set under 50%, the GY601 operates in the Normal mode. When setting is changed 1%, the gyro...
  • Page 24 The Programmable Mixing (PMIX) function lets operator perform a gain adjustment at each condition. Set the sensitivity at all conditions. [GY601 Settings] Select the gyro operation mode at the GY601 Mode screen. (AVC, NOR, or CMT) [Transmitter Settings] Function Control: Set the CH5 (GYR) switch to “NUL”...
  • Page 25 Use the following values as the sensitivity setting standard: Hovering Flight +40% AVCS mode +70% Normal mode -70% -40% Actual gain When set over 0%, the GY601 operates in the AVCS mode and when set under 0%, the GY601 operates in the Normal mode.
  • Page 26 When Using a T8Usuper Transmitter The Gyro Mixing (GYRO) function lets operator perform a gain adjustment at each Idle-Up switch position. [GY601 Settings] Select the gyro operation mode at the GY601 Mode screen. (AVC, NOR, or CMT) [Transmitter Settings] Gyro Mixing function: 1.
  • Page 27 Use the following values as the sensitivity setting standard: NORM IDL1 IDL2 SW-E Hovering Flight AVCS mode Normal mode Actual gain When set over 50%, the GY601 operates in the AVCS mode and when set under 50%, the GY601 operates in the Normal mode.
  • Page 28 When Using a Transmitter ATV Function The ATV function lets operator perform a gain adjustment at each CH5 switch position. [GY601 Settings] Select the gyro operation mode at the GY601 Mode screen. (AVC, NOR, or CMT) [Transmitter Settings] ATV function: Set the ATV rates at the transmitter CH5 ATV function.
  • Page 29 Adjust both the ATV rates to 90% at the transmitter Ch5 ATV function. [GY601 Settings] Operation Mode Setting function: Select the gyro operation mode at the GY601 Mode screen. (AVC, NOR, or CMT) Gyro Gain Adjustment function: Set the G:1 and G:2 gains at the GY601 G:x screen.

  • Page 30: Initialization

    Initialization AVCS mode operation is based on the rudder neutral data stored in the GY601. When using the GY601 for the first time, or when the internal reference data and the transmitter neutral position differed when the transmitter neutral trim was adjusted, etc., the rudder neutral data must be read again.
  • Page 31 Never use the transmitter rudder trim in the AVCS mode. When the rudder is trimmed during flight, the neutral position will change. When using the GY601 in the AVCS mode, set revolution mixing to OFF. When the rudder neutral position was changed by the linkage, the rudder neutral position in the AVCS mode must always be re-read before use.

  • Page 32: Installation And Adjustment

    Frame gyro bed directions. Install the GY601 sensor to the fuselage using the accessory sensor tape. Also routinely check the sensor tape and replace the tape if it is saturated with oil or partially peeled.
  • Page 33 To receiver (normally ch5). Always use the special S9251 servo with the GY601. The GY601 cannot operate with servos other than the S9251. The servo may be destroyed. Gyro operation mode selection When using the gyro only in the NOR mode, select NOR.
  • Page 34 NSTALLATION AND DJUSTMENT *However, when using the gyro in the CMT mode, since the AVCS and NOR mode gain must be set during hovering and in flight, a transmitter with a gyro mixing function (T9Zwc series, T8Usuper series) is necessary. •For a description of transmitter setting, see the remote gain function (p21).
  • Page 35 •At this time, the GY601 gain display becomes 80% for hovering and 60% for flight.(*1) (*1) In the case of the T9Zwc GYR function, GY601 gain is 0% for a transmitter setting of 50%. When the gain is set above 50%, the GY601 operates in the AVCS mode and when the gain is set below 50%, the GY601 operates in the normal mode.
  • Page 36 When using a transmitter without a gyro gain switching function, connect the gain setting connector to an idle channel and set the GY601 G1 and G2 gains using this gain setting screen. Gain can be trimmed by means of the transmitter ATV function.

  • Page 37: Flight Adjustments

    •When the sensitivity is low even when the gyro sensitivity is 100%, make the rudder servo horn position longer. The sensitivity can be increased (up to 120%) at the GY601 gyro gain adjustment screen, or by increasing the ATV amount of the transmitter sensitivity setting channel.
  • Page 38 Since the gyro gain also has a large effect on the stopping state, make this adjustment after adjusting the sensitivity. Adjust the rudder operation feel using the GY601 AVCS sense in the AVCS mode. (Steering angle, neutral suppression, and pirouette stopping)
  • Page 39 NSTALLATION AND DJUSTMENT When you want to use rudder mixing in the Normal mode, set the transmitter so that rudder mixing is applied only during Normal mode operation. Never use rudder mixing in the AVCS mode.

  • Page 40: Reference

    EFERENCE EFERENCE Specifications * Specifications are subject to change without prior notice. GY601 Ratings Yaw-axis stabilizer for helicopter (rate gyro) Display device: 8-character dot matrix liquid crystal display Operating voltage range: DC 3.8V to 6.0V Current drain: 70mA (@5.0V, including sensor) Dimensions: 57 x 32 x 15mm (amp), 34 x 34 x 18mm (sensor) Weight: 34g (amp) + 24.5g (sensor)

  • Page 41: Definition Of Abbreviations

    EFERENCE Definition of Abbreviations The following defines the abbreviations and symbols used in this manual in alphabetical order. The function names are given on the description pages. 3D mode. p19 Hello Power on screen display. High High side. ACGA/B Rudder control gain (AVCS) p17 IDLE Transmitter power OFF state.

  • Page 42: Gy601 Parameters Sheet

    EFERENCE GY601 Parameters Sheet * Copy and use. Helicopter: Date: Initial Parameter value value Remarks GDir NOR/REV Gyro Reverse G:xx 100% 0-120% Gyro Gain Adjustment 100% 0-120% ACGA 120% 10-250% ACGx,NCGx ACGB 120% 10-250% NCGA 130% 10-250% Rudder Control Gain...
  • Page 43 EFERENCE FUTABA CORPORATION Makuhari Techno Garden Bldg., B6F 1-3 Nakase, Mihama-ku, Chiba 261-8555, Japan Phone: (043) 296-5118 Facsimile: (043) 296-5124 ©FUTABA CORPORATION 2000, 11...

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