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ALZRC 3GYS Instructions Manual

3-axis gyro
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Instructions for the ALZRC 3-axis gyro
ALZRC 3GYS is a small, light weight, high-performance 3-axis gyro, for various levels of electric and gas
helicopters. It uses a High-performance processor, which can do very fast operations. Its main use is for the
control of RC model helicopters, and can be used as a stand alone tail rotor control gyro.
Size: 38.2mm * 26.2mm * 13mm
Weight: 26g (full metal shell, including cable and plugs)
Operating Voltage: DC 3.5V-9V
Operating Current: 60mA
Operating temperature: -10° to +50°
Maximum angular rate: 800 degrees / sec
Support for the rudder servo: 1.52ms analog servo, 1.52ms digital servo, 760us digital servo, 960us digital
servo
Support for swashplate servos: 1.52ms analog servos, 1.52ms digital servos
Supported remote control devices: PPM, PCM, 2.4G
Connections to the receiver
Servo connections: rudder connected CH4, depending on the swashplate type, the swashplate servos are
connected to CH1, CH2 & CH3.
For example, for CCPM 120° (Heli 120), use the following connections:
CH1: Aileron
CH2: Pitch
CH3: Elevator
See the swashplate types diagram below for all connections. Note the CH1, CH2 & CH3 shown at the control
points of the swashplate.
1. Introduction
2. Specification
3. Functions and interfaces

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Summary of Contents for ALZRC 3GYS

  • Page 1 Instructions for the ALZRC 3-axis gyro 1. Introduction ALZRC 3GYS is a small, light weight, high-performance 3-axis gyro, for various levels of electric and gas helicopters. It uses a High-performance processor, which can do very fast operations. Its main use is for the control of RC model helicopters, and can be used as a stand alone tail rotor control gyro.

  • Page 2: Led Indications

    Supported swashplate types 4. LED indications Red light Working in tail lock gyro mode Blue light Working in the non tail lock gyro mode Red and blue light Gyro has not received any signal Initialization failed, please keep the gyro still Red and blue lights flashing and the rudder stick at center Red light keeps flashing...
  • Page 3 ◆The gyro has three installation directions that can be chosen: 1, 2 & 3 Direction 1: Direction 2: Direction 3: 6. Servo arm and connecting rod installation 6.1 Swashplate servo ◆ Firstly, confirm that the rotor head and swashplate mechanical parts are installed correctly, and move smoothly, before being connected to the servos.

  • Page 4: Remote Device Settings

    Note: After completion of the above rudder setup, do not connect the rudder servo to the gyro. 7. Remote Device Settings In the transmitter, create a new helicopter model without any mixing functions. Select 1 servo (90 degree) mode (Futaba: H1; JR: 1 servo NORM; Hitec Aurora 9: 1 servo (90°)). For all channels, set the fine-tuning value (Trim) and the internal fine-tuning value (Sub-trim), to zero.
  • Page 5 Note the correct orientation of the data cable plug The programmer will boot and display "ALZRC 3GYS Loading data!". After a successful connection the display will show "Load succeed!", and then displays the first menu "Basic setup". 9.2 Monitor Use the "Monitor" menu to check the transmitter settings are correct.
  • Page 6 A gyro mode switch should be setup in the transmitter to change between locked tail and non lock tail mode. The following table is a list of major transmitter brands showing the suggested values that should be uses. After transmitter setup, set the switch to the tail locked mode position. After the "G:" an "A" should be displayed.
  • Page 7 return to "Load model". 9.4 Rudder servo type selection When the screen shows "Load model", press the DOWN/DATA- key to display "Tail servo type", and then press enter to select it. There are five types of servos to choose from: ◆...
  • Page 8 Adjust the swashplate servos "Servo 1", "Servo 2", "Servo 3" value, so that all the swashplate servo arms are level and the rods are vertical. Then adjust the servo arm to the swashplate pushrods, so that the swashplate is level. Now adjust the blade arm pushrods for zero degrees pitch. Adjust the rudder servo "Servo 4"...
  • Page 9 9.8 Servo position adjustment limit When the screen shows "Servo reverse" press the DOWN/DATA- key to display "Servo limit", and then press ENTER to select it. Move the rudder stick to the full left and right position, and adjust the "Tail limit A" and "Tail limit B" so that the maximum travel is used without any binding at the limit.
  • Page 10 symbol. Pick up the helicopter and pitch the helicopter forwards and backwards. The swashplate should try to remain level (pitch forward, swashplate moves backwards; pitch backwards, swashplate moves forwards). If the reverse happens, change the "Pitch:" symbol. Pick up the helicopter and roll the helicopter to the left and right. The swashplate should try to remain level (roll left, swashplate moves to the right;...

  • Page 11: Flight Notes

    Rotate the tail. The swashplate should still be tilted in the same direction. When finished, press the BACK key to return to "Pirouette optimization". The swashplate will return to neutral. The 3-axis gyro adjustments are now complete. In the transmitter, you can now set the throttle and pitch curves, dual rates and expo, to your preferred flight settings.