SETUP MENU J - Cyclic throw
At SETUP MENU point J we adjust the internal servo throw so that the AR7210BX receiver has a reference on how far it must move the servos when controlling the helicopter. To set the throw you align one rotorblade on the longitudinal axis (in parallel to the tail boom) and measure the cyclic pitch with a digital pitch gauge on this rotorblade. (You can do this from the front or from the rear!)
Initially you should see 0 degrees of pitch now (in case you did the setup at SETUP MENU point H properly!). Then you switch to the adjustment position. The system will give some amount of pitch which you measure again. This time you should see 6.0 degrees (+ or - is not of importance). If not, increase or decrease the swash throw accordingly.
The color of the Status LED gives some indication whether you rotorhead geometry is well suited for flybarless usage or not. Ideally the Status LED on the device should be blue when in 6.0 degress position. If it isn't, this means your servo movements cause very much pitch deflection on the rotorhead. This can be bad for the performance as the system may tend to oversteer and overreact very easily. If you have problem with finding correct gain settings or overcompensation later in flight, the cause may be found here. To solve this you can change geometry by moving the linkage balls on the servo horns closer to the servo center.
Adjustment on the device
Initially the Status LED will be off, the swashplate will be leveled and rotorblades will have 0 degrees of pitch. Attach your pitch gauge at the rotorblade or blade grip, calibrate it to 0 degrees and then tap the aileron stick once. This will move the rotorblade into measuring position. Now check the pitch gauge, we want to see exactly +-6.0 degrees. By rudder stick input you can increase/decrease the amount of pitch (left = decrease, right = increase). You can switch back and forth between measure and zero position as often as you like. When done click the button to proceed to the next menu point.
Setup with StudioXm
Initially the swashplate will be leveled and rotorblades will have 0 degrees of pitch when the cyclic throw adjustment screen opens. Attach your pitch gauge at the rotorblade or blade grip, calibrate it to 0 degrees and then click the Measure button. This will move the rotorblade into measuring position. Now check the pitch gauge, we want to see exactly +-6.0 degrees. Increase/decrease the throw value with the + and - buttons or the dial until the pitch is adjusted correctly.