Manual Robbe Futaba FX-40 (page 77 of 105) (English)

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Model menu

Trim Mix 1 and 2

FX-40

The Trim Mix function first has to be activated in the Status

line. Mark the field, and the same field then displays ‘ON’ or

‘OFF’ instead of ‘INA’ (inactive), according to the position of

the switch.

If you wish, you can set global or separate mode using the

appropriate switch field in the second line.

Use the familiar method to define a switch for triggering the

mixer: mark the appropriate field and define the switch and its

direction of operation in the switch select menu which now

appears. The default is ‘NONE’, i.e. the mixer is always swit-

ched on.

You can also choose to activate the ‘TRIM’ mixer manually

using the selected switch, or by a pre-set position of a particu-

lar transmitter stick. If you prefer automatic mode, you must

first mark the appropriate field. This calls up a menu in which

you can use the familiar procedure to enter your preferred

stick, and the threshold point on the stick arc.

• Determining the servo transit speed

The servo transit speed for all three control surface types

(ailer

ons, flaps and elevator) can be pr

ogrammed in a sepa-

rate field, in each case separately for the servo directions

‘there’ and ‘back’. The settings are entered using the tech-

nique which has already been described many times, i.e.

using the arrow buttons.

• Fine-tuning

In the switch select menu you can select a transmitter con-

ol or switch for fine-tuning the function. The pr

ocedure for

this has already been adequately covered in this manual.

• Determining the delay time

It is possible to program a delay time for switching between

flight modes, so that ther

e is a smooth transition when you

switch modes. First mark the field, then set a delay of up to

27 incr

ements (corresponding to nine seconds) using the

arrow buttons.

If you wish, you can assign a switch which activates and

disables the set delay. This means that you can call up eit-

her type of transition - abrupt or smooth - when you switch

between flight phases. The method of selecting the switch

is the same as always.

There is a second programming level to the Trim Mix function:

in this sub-menu the ‘Trim Mix’ settings can be entered for all

the wing control surfaces: up to four ailerons, two brake flaps,

two camber-changing flaps, as well as the elevators.

The display for the second programming level looks like this:

An Offset value can be entered separately for each control sur-

face, by marking the appropriate field and then entering the

required value using the arrow buttons. The adjustment range

is +250% to -250%; the default setting is 0%. Pressing the

‘Reset’ field restores the default setting.

The same technique is employed to set the Trim (Tuning). The

adjustment range is +100% to -100%; the default value is 0%.

In each case the sum of both percentage values is displayed in

brackets below the two adjustment fields, making proper allo-

wance for the set prefixes

The screen shot below shows a sensible programming set-up

for the Trim Mix 1 function.

Finally, please note that the programming options and the

actual appearance of the screen display may vary slightly

according to the model type and wing type you have selected.

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Robbe Futaba FX-40 Manual

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