Manual Robbe Futaba FX-40 (page 96 of 105) (English)

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Model menu

Gyro settings

FX-40

19.10 GYRO SETTINGS

This function is used for adjusting gyro gain (sensitivity) fr

the transmitter. Gyro gain can be entered as a percentage, and

it is also possible to select the gyro type. You can assign a

switch for changing gyro gain to any of three settings (Rate 1,

2 or 3). As with many functions, it is also possible to determine

whether the settings are to apply to all flight modes or only to

one mode (Glob. or Sepa. mode).

The function has already been described in Section 18.13 on

page 77 of the Model menu for fixed-wing model aircraft, and

the method of setting it up is largely identical. However, since

the gyro settings are particularly important for model helicop-

ters, we will cover this function again at this juncture, not least

because it includes the option of remote gyro calibration.

When you activate the ‘Gyro’ option in the Model menu, the

screen looks like this:

The menu has three identical levels in which you can set three

different gain values (Rates 1 - 3). The first step is to activate

the mixer in the usual fashion: simply mark the appropriate

field in the Status line, and the label in the field changes from

‘INA’ to ‘ON’ or ‘OFF’ according to the physical position of the

switch.

In the ‘Type’ column you should enter the type of gyro fitted to

the model. For AVCS or ‘heading hold’ gyros enter ‘GY’ as the

type; for others select the ‘NORM’ type. In the ‘Switch’ column

you can select a switch and its direction of operation using the

familiar procedure. The default setting is ‘NONE’, i.e. the func-

tion is constantly switched on. The effects and method of set-

ting the ‘Glob’ or ‘Sepa’ mode have already been described;

the settings are adjusted at far right on the screen.

If you have entered ‘GY’ as gyro type, you have the option of

entering whether it is to work in normal (NOR) or ‘AVCS’ mode.

For more information on this, please refer to the instructions

supplied with the gyro you are using. The gain for the gyro is

entered in the usual way as a percentage value, with the help

of the arrow buttons. In each case the adjustment range is 0%

to 100%; the default setting is 0%. Pressing the ‘Reset’ field

restores the default setting.

It is possible to program a transmitter control for carrying out

fine adjustments to this function (fine-tuning); changes are

implemented in the separate ‘Fine-tuning’ frame in the usual

manner. Mark the appropriate field and select your preferred

transmitter control in the transmitter control / switch select

menu which then appears.

Once you have marked the column of the corresponding field,

you can enter the fine-tuning rate using the arrow buttons; the

adjustment range is 0% to 20%.

If you need to reverse the direction of effect, mark the field

containing the prefix, and it will change from ‘+’ to ‘-’; the fine-

tuning now works in the opposite direction to the previous set-

ting.

The screen shot below shows a typical example of gyro pro-

gramming.

NOTE:

As of software version 1.0.10, Encoder 1.31, gyro gain can

only be adjusted using this menu, i.e. the ability to alter gain

using a transmitter contr

ol on the gyro channel has been deli-

berately removed, since a number of users entered settings in

both menus, and the interaction of these settings gave undes-

irable results.

If you wish to circumvent this limitation, simply select the

‘Gyro 2’ function in the Functions menu instead of ‘Gyro’. This

arrangement restores the ability to carry out adjustments using

a transmitter slider. If you opt for this solution, do not enter set-

tings in this menu.

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Robbe Futaba FX-40 Manual

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