FUTABA GY611 Instruction Manual
  1. Manuals
  2. Brands
  3. FUTABA Manuals
  4. Accessories
  5. GY611
  6. Instruction manual
FUTABA GY611 Instruction Manual

FUTABA GY611 Instruction Manual

Avcs gyro for model helicopter
Hide thumbs
Table of Contents

Advertisement

Quick Links

AVCS GYRO
I
M
NSTRUCTION
ANUAL
YAW-AXIS STABILIZER FOR MODEL HELICOPTER
(RATE GYRO)

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the GY611 and is the answer not in the manual?

Questions and answers

Related Manuals for FUTABA GY611

Summary of Contents for FUTABA GY611

  • Page 1 AVCS GYRO 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

    · Name and Function of Each Part ----------------------- 12 · LCD Display and Edit Keys ----------------------------- 13 · Function Map ---------------------------------------------- 14 · GY611 Functions Setting -------------------------------- 15 · Remote Gain Function ----------------------------------- 21 · Initialization ----------------------------------------------- 30 INSTALLATION AND ADJUSTMENT ·...

  • 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 GY611 with a PCM proportional system. ·Using the GY611 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 GY611 uses a conductive resin case to reduce electromagnetic interference. Be- cause the surface of the case is conductive, metal objects may cause a short circuit.

  • Page 6: Fuselage Maintenance Precautions

    1 second) the remote gain channel switch between the AVCS mode and Normal mode at least three times and switch the AVCS side with the transmitter in the ON state. This memorizes the new rudder position inside the GY611. Avoid sudden temperature changes.

  • Page 7: S9256 Usage Precautions

    Do not use the S9256 with applications other than the GY611 gyro. · The S9256 is designed to be used with the GY611 only, and will not operate in other applications. Trouble may also occur. Immediately after flight, do not touch the S9256 case.

  • Page 8: Before Use

    EFORE EFORE Set Contents After unpacking the GY611 set, first check if the following parts are provided: GY611 control amp (x1) Sensor tape (x3) GY611 sensor (x1) Mini screwdriver (x1) S9256 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 improved 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 flight. The AVCS system requires a high-precision angular velocity sensor. The GY611 realizes a high-precision angular velocity detection function and ex- tremely 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...
  • Page 11 Initially, the GY611 trims the rudder by flying in the Normal mode to take the rudder linkage neutral position. This centers the linkage. At this time, this rudder neutral reference point is read to the GY611. Giving the gyro the rudder neutral reference signal and performing tail operation by referring to this signal in the AVCS mode in this way is how the AVCS system differs from the conventional system.

  • Page 12: Data Setting

    ETTING ETTING Name and Function of Each Part GY611 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: Gy611 Functions Setting

    ETTING GY611 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 rud- der 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 direc- tion of the rudder stick and the gain of each direction can be set.
  • Page 18 NOR mode. In the NOR mode, the GY611 operates the same as an ordinary gyro. In the AVC mode, the GY611 always operates in the AVCS mode. In the CM mode, the GY611 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 pir- ouette 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 dis- played for the right and left directions. Note: When this screen is displayed, the GY611 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". (Remote Gain Function) Receiver Transmitter GY611 Gain/Mode Selection Mode Settings • CH5 switch • Normal mode (NOR) • Idle-Up switch (T9Csuper) •...
  • Page 22 The Gyro Sense Mixing (GYR) function lets operator perform two-point gain adjustment at each condition. Set the sensitivity at all conditions. [GY611 Settings] Select the gyro operation mode at the GY611 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 The GY611 sensitivity is 0% at 50%. When set over 50%, the GY611 oper- ates in the AVCS mode and when set under 50%, the GY611 operates in the Normal mode. When setting is changed 1%, the gyro sensitivity is changed...
  • Page 24 The Gyro Mixing (Gyro) function lets operator perform three-point gain ad- justment at each condition. Set the sensitivity at all conditions. [GY611 Settings] Select the gyro operation mode at the GY611 Mode screen. (AVC, NOR, or CMT) [Transmitter Settings] End Point (ATV) function: Adjust the both travels to 100% at the transmitter 3ch(Gyro) End Point func- tion setup screen.
  • Page 25 ETTING [Setting Example] Adjust the gyro gain at the Gyro Mixing setup screen at each condition. The following shows a setting example in the CMT mode. Activate the function. Select the desired mode (AVCS or Nor) and adjust the gyro sensitivity. Select the selector switch.
  • Page 26 When Using a T9Csuper Transmitter The Gyro Mixing (GYRO SENS) function lets operator perform a gain adjust- ment at each condition switch position. [GY611 Settings] Select the gyro operation mode at the GY611 Mode screen. (AVC, NOR, or CMT) [Transmitter Settings] Gyro Mixing function: 1.
  • Page 27 ETTING [Setting Example] Adjust the gyro gain at the Gyro Mixing (GYRO SENS) setup screen. The following shows a setting example in the CMT mode. Activate the function. Set the type of gyro to GY. Select the de- sired mode (AVC o r N O R ) a n d adjust the gyro sensitivity.
  • Page 28 When Using a Transmitter End Point (ATV) Function The End Point (ATV) function lets operator perform a gain adjustment at each selector switch position. [GY611 Settings] Select the gyro operation mode at the GY611 Mode screen. (AVC, NOR, or CMT) [Transmitter Settings] End Poin (ATV) function: Set the rates at the transmitter remote gain channel (CH5, etc.) End Point...
  • Page 29 (CH5, etc.) End Point (ATV) function. [GY611 Settings] Operation Mode Setting function: Select the gyro operation mode at the GY611 Mode screen. (AVC, NOR, or CMT) Gyro Gain Adjustment function: Set the G:1 and G:2 gains at the GY611 G:x screen.

  • Page 30: Initialization

    Initialization AVCS mode operation is based on the rudder neutral data stored in the GY611. When using the GY611 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 neu- tral data must be read again.
  • Page 31 · When the rudder is trimmed during flight, the neutral posi- tion will change. When using the GY611 in the AVCS mode, set revolution mixing to OFF. W h e n t h e r u d d e r n e u t r a l p o s i t i o n w a s...

  • Page 32: Installation And Adjustment

    Frame gyro bed Install the GY611 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 Always use the special S9256 servo with the GY611. ·The GY611 cannot operate with servos other than the super narrow pulse (760μs) servo. 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 (T14MZ, T9Zwc series, T9Csuper series, etc.) is necessary. ·...
  • Page 35 · Set the gain in flight to 60% for the AVCS and NOR mode, respec- tively, on the transmitter screen. · At this time, the GY611 gain display becomes 80% for hovering and 60% for flight. When using a transmitter without a gyro gain switching function, connect the gain setting connector to an idle channel and set the GY611 G1 and G2 gains using this gain setting screen.
  • Page 36 Rudder neutral position check In the AVCS mode, the rudder servo neutral position is unknown. Check the neutral position by switching the GY611 to the NOR mode, or by moving the rudder stick to the left and right at least three times at high speed and immediately returning the stick to the neutral position.

  • 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 GY611 gyro gain adjustment screen, or by increasing the End...
  • Page 38 NSTALLATION AND DJUSTMENT Point (ATV) amount of the transmitter sensitivity setting channel. The actual sensitivity can be checked on the GY611 normal screen display. Adjust the hovering and flight rudder effect using the transmitter's D/R or AFR function. · Do not adjust with the End Point (ATV) function. If the End Point (ATV) func- tion is used, trimming may change.
  • Page 39 NSTALLATION AND DJUSTMENT Adjust the rudder operation feel using the GY611 AVCS sense in the AVCS mode. (Steering angle, neutral suppression, and pirouette stop- ping) When you want to use rudder mixing in the Normal mode, set the transmitter so that rudder mixing is applied only during Normal...

  • Page 40: Reference

    EFERENCE EFERENCE Specifications * Specifications are subject to change without prior notice. GY611 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)

  • 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 GYRO SENS(E) T9C, T9Z gyro sense mixing. ACGA/B Rudder control gain (AVCS) Hello Power on screen display.

  • Page 42: Gy611 Parameters Sheet

    EFERENCE GY611 Parameters Sheet * Copy and use. Helicopter: Date: Initial Parameter value value Remarks GDir NOR/REV Gyro Reverse G:xx 100% 0-120% 100% 0-120% Gyro Gain Adjustment 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) 296-5119 Facsimile: (043) 296-5124 ©FUTABA CORPORATION 2005, 6...

Table of Contents

Save PDF