Bedienungsanleitung Robbe Futaba FX-40 (Seite 47 von 105) (Englisch)

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Linkage Menu

FX-40

16.11 END-POINT (ATV)

SERVO TRAVEL SETTINGS (ATV)

This function provides a means of

adjusting servo travel separately for

each side of centr

, separately for

all twelve channels. It is often

necessary to reduce servo travel in

order to prevent the servo output

shaft moving through an angle grea-

ter than that permitted by its mecha-

nical limits. However, servo travel

can also be increased for particular

applications. This function always acts upon the individual

servo channel you select, and all mixed functions involving this

channel. In the same menu you can also enter a servo travel

limit point and the desired servo transit speed for each chan-

nel separately.

Please note that any changes you make to this setting also

affect the trim travel proportionally, as well as any Dual Rate

settings you have programmed.

The following illustrations show the ATV menu for fixed-wing

models and helicopters respectively.

In this menu you can set the desired servo travel, separately

for each side of centre, and also define a limit point. Your pre-

ferred servo transit speed can also be entered at this point.

The menu has two levels: the first display shows channels 1 …

6; the second channels 7 … 12. You can switch between levels

by pressing the appropriately labelled button at top right. The

clearly laid-out graphic display makes the programming very

straightforward.

• Servo travel settings

In the “Travel” column mark the appropriate field for right or

left travel of the servo; the backgr

ound of this field now

changes to pink. At this stage you can use the single arrow

buttons to incr

ease or decrease the travel in single percen-

tage increments. Pressing the double arrow buttons chan-

ges the values in increments of 10%. If you wish to alter the

travel setting for both directions, you have to remember to

change the value for the other side of centre. The default

setting is 100%, and the travel can be adjusted within the

range 30% to 140%. Pressing the ‘Reset’ field restores the

default setting. If one of the transmitter controls is not in the

neutral position, the current setting is indicated as a white

field.

It is usually only necessarily to set the servo end-points

once for the maximum possible or desired travel, i.e. subse-

quent corrections are not generally necessary. Individual

travel adjustments for particular flight modes can be

entered in the transmitter control travel (AFR) menu, where

you can set up curves with 2 … 17 points for each function,

for a maximum of eight different flight modes.

• Entering limit points

The same procedure is used for determining the servo limit

point: mark the appr

opriate field and set the value using the

arrow buttons. The limit points can also be entered indivi-

dually for each side of servo travel. The default value is

135%, but the limit point can be varied within the range 0 to

155%. Pressing the ‘Reset’ button restores the default set-

ting. The programmed area is indicated in red on the

screen.

Why limit points?

Servo travel can easily exceed the usual limits, for instance, if

transmitter contr

ol travel is set to a high value, or if two func-

tions ar

e superimposed, usually by a mixer.

This could cause the servo to strike its mechanical end-stops,

so the limit points should be set in such a way that maximum

possible servo travel is not exceeded, and / or the servo can-

not be damaged by the mechanical linkage.

Setting appropriate limit points ensures that the servo does

not move beyond the position defined by the limit point,

regardless of the transmitter control position and any mixers

which act upon that servo.

• Entering servo transit speeds

If you wish to adjust the servo transit speed to meet parti-

lar requirements, mark the appropriate field in the right

column. Using the arrow buttons, you can now adjust the

servo speed in single increments within the range 0 to 27

increments. The default value is 0 increments. Pressing the

‘Reset’ button restores the default setting.

30-140%

left

30-140%

right

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