User manual FUTABA GY611

[. . . ] AVCS GYRO INSTRUCTION MANUAL YAW-AXIS STABILIZER FOR MODEL HELICOPTER (RATE GYRO) 2 Thank you for buying a GY611 AVCS gyro. 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. FOREWORD The GY611 gyro is an AVCS (Angular Vector Control System) rate gyro developed for model helicopter competition. [. . . ] 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. <3D mode steering angle setting> · During 3D mode setting, the transmitter rudder steering angle is set to 100% and approximately 500º/second high pirouette speed. Therefore, initially set the transmitter rudder steering angle to a low value so that the tail can be safely controlled. (About 70%) The pirouette speed is proportional to the rudder steering amount without regard to the gyro sensitivity. 20 DATA SETTING AVCS Sense Initial value : 100% Adjusts the rudder control characteristic in the AVCS mode. Check the rudder operation feeling and stopping characteristic and adjust. When the flight mode (page 19) is the 3D mode, this value becomes the pirouette standard value. Linkage Limit Setting Initial value : 100% Sets the rudder servo travel limit. Operate the rudder stick and adjust the rudder servo travel limit by pressing the +/- key so that the servo moves to the maximum linkage position. Use the same procedure to set both the left and right limits. When setting, move the servo substantially so that the rudder angle automatically becomes 200% and limit setting is easy. A or B is displayed 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. DATA SETTING Remote Gain Function 21 The remote gain function lets operator perform AVCS mode and Normal mode sensitivity adjustment and operation mode switching from the transmitter. The channel used here is called the "remote gain channel". (Remote Gain Function) Transmitter Gain/Mode Selection Gain Settings · CH5 switch · Idle-Up switch (T9Csuper) · Flight condition (T14MZ, T9Z) · End Point (ATV) function · Gyro mixing (T14MZ/T9Z/T9Csuper) Receiver GY611 Mode Settings · Normal mode (NOR) · AVCS mode (AVC) · Selectable mode (CMT) Gain Settings · Gyro Gain Adjustment Remote Gain Channel (CH5, etc) 22 DATA SETTING When Using a T9Z World Champion Model Transmitter Gyro Sense Mixing 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. Select the Dual Mode (DUO) at the transmitter Gyro Sense Mixing setup screen. (The following page shows a setting example in the CMT mode. ) [Sensitivity Display] The gain display indicates the actual gain at the GY611 normal screen display. The following shows the relationship between transmitter and gyro setting . [Relationship between transmitter and gyro setting] Transmitter settings: 0% (GAIN1/GAIN2) GY611 mode settings: 50% 100% Normal mode NOR: AVCS mode AVC: CMT: Normal mode AVCS mode (G2) (G1) 0% 100% Actual gain: 100% DATA SETTING [Setting Example] 23 Adjust the gyro gain at the Gyro Sense Mixing setup screen at each condition. The following shows a setting example in the CMT mode. Select the Dual Mode (DUO). GYRO SENSE DUAL 01 . NORML HEL : MODE PCM 0: 23: 17 85 % 15 % : GAIN 1 : GAIN 2 0 20 40 60 80 100 END Sensitivity rate: Choose the GAIN1 or GAIN2 by the CH5 switch. Use the following values as the sensitivity setting standard: CH5 switch Hovering GAIN1 setting GAIN2 setting 85% Flight 70% AVCS side 15% 30% 40% Normal side Actual gain: 70% The GY611 sensitivity is 0% at 50%. When set over 50%, the GY611 operates in the AVCS mode and when set under 50%, the GY611 operates in the Normal mode. [. . . ] First, perform rudder neutral adjustment in the Normal mode. · Move the transmitter trim lever and reset the neutral position. When the rudder servo neutral position has changed considerably, readjust the linkage. 3 When the transmitter rudder trim was adjusted, the rudder neutral data must be read to the GY611. Therefore, always perform the following operations: · Switch the transmitter sensitivity switch quickly (internal of within 1 second) between AVCS and Normal at least three times. [. . . ]