User manual FUTABA GY502

[. . . ] AVCS GYRO GY502 INSTRUCTION MANUAL YAW-AXIS STABILIZER FOR MODEL HELICOPTER (RATE GYRO) 2 Thank you for buying a GY502 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 GY502 is an AVCS (Angular Vector Control System) rate gyro developed for use with . 60 type and other model helicopters. [Features] ·High-speed arithmetic processing by microcomputer allows high-speed pulse drive of servos. [. . . ] Rudder stick left and right can be set separately. 18 DATA SETTING Gain Tracking Initial value : +0% Adjusts left and right tail braking tracking. For example, when there is a sense of hunting when stopping left pirouette or the helicopter drifts when stopping right pirouette, shift Trk in the + direction. In the opposite case, shift Trk in the - direction. Operation Mode Setting Initial : CMT Sets the gyro operation mode. In the NOR mode, both G1 and G2 operate in the AVCS mode. In the CMT mode, G1 operates in the AVCS mode and G2 operates in the NOR mode. In the NOR mode, the GY502 operates the same as an ordinary gyro. In the AVC mode, the GY502 always operates in the AVCS mode. In the CM mode, the GY502 can be used in both the AVCS and NOR modes. DATA SETTING Servo Frame Rate Initial value : Low 19 Switches the servo output pulses. The Low mode outputs pulses for an ordinary servo. Switch to the High mode only when using a digital servo. When using a servo that cannot be driven by high-speed pulses, other than a digital servo, never set servo frame rate to the High mode. The servo may be destroyed. 20 DATA SETTING AVCS Sense Initial value : 100% Adjusts the rudder control characteristic in the AVCS mode. Adjust by checking the rudder operation feel and stopping characteristic. 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 GY502 does not operate as a gyro. To check operation, return to the initial screen, etc. DATA SETTING 21 Remote Gain Function 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". (Channel 5 is used. ) (Remote Gain Function) Transmitter Gain/Mode Selection · CH5 switch · Idle-Up switch (T8Usuper) · Flight condition (T9Z) Receiver GY501 Mode Settings · Normal mode (NOR) · AVCS mode (AVC) · Selectable mode (CMT) Gain Settings · ATV function · Gyro mixing (T8Usuper/T9Z) · Programmable mixing (T9Z) Gain Settings · Gyro Gain Adjustment Remote Gain Channel (CH5) 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. [GY502 Settings] Select the gyro operation mode at the GY502 Mode screen. (AVC, NOR, or CMT) [Transmitter Settings] ATV function: Adjust both the RATE A and RATE B rates to 100% at the transmitter ATV function setup screen. [. . . ] ·Set rudder ATV to 100% under all conditions. ·Also set the T9Z condition delay function to INH. 9 If the normal screen operation mode display is "A" under all usage conditions, neutral offset is OK. If " " is displayed, display "A" by operating the rudder trimmer for that flight condition. 10 Rudder neutral position check In the AVCS mode, the rudder servo neutral position is unknown. Check the neutral position by switching the GY502 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. [. . . ]