Bedienungsanleitung Multiplex ROYALevo7 (Seite 46 von 77) (Englisch)

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ROYAL evo 7 - Instructions

Page 45

ENGLIS

Display structure

Line 1 always displays the name of the selected servo (in

our example the

Aileron servo). Above the graph the

channel number of the selected servo is shown (exam-

ple:

SERVO: 1).

The numbers

1 ... 5 below the graph (X-axis) correspond

to the servo calibration points

P1 ... P5.

16.1.1. Parameter:

REV. (servo reverse)

To reverse the direction of servo rotation simply select

the

REV. parameter and press the ENTER button or

one of the two 3D digi-adjustors. The cursor changes

to the value

rev (servo rotation reversed) or nor.

(normal servo rotation). To reverse the servo’s direction

of rotation simply press the REV/CLR button:

 the curve is “reversed”;

 the value changes from

rev  nor.

16.1.2. Parameter:

P1 … P5

You can carry out several tasks by adjusting the servo

calibration points

P1 … P5.

In detail these are:

x setting the maximum working range of the servo. The

values

P1 and P5 set here (servo end-points) are

never exceeded (limit values). This serves to protect

the servos from mechanical stalling at either end-

point / maximum travel;

x setting symmetrical control surface travels;

x matching the travels of multiple servos to each other

(e.g. two aileron or two elevator servos), so that the

control surfaces work exactly in parallel;

x compensating for mechanical discrepancies in the

control surface linkage. Using the intermediate points

P2 and P4, for example, it is possible to match the

travel of two control surfaces accurately between

servo centre and servo end-point;

x setting deliberately non-linear servo travel (= curve),

e.g. for the throttle servo in power models, in order to

obtain a linear speed change over the full range of

throttle control (throttle curve).

This is the procedure for calibrating a servo:

1. Servos which are operated directly by transmit-

ter controls e.g.

Aileron, Elevator, Rud-

der, Throttle, L.gear

, ...

Check first that the direction of rotation of the servo

matches the movement of the transmitter control.

If necessary, reverse the direction using the

REV.

para-meter (Î 16.1.1.).

Important: if you subsequently reverse the direc-

tion of servo rotation, it will be necessary to repeat

the calibration process.

2. Servos which are controlled by mixers

e.g.

AILERON+, DELTA+, V-TAIL+, ...

With these servos the direction of servo rotation is

initially irrelevant, as the correct direction for the

control surface movement will be set later during

the mixer set-up process.

Exception: the following servos in model helicop-

ters:

HEADle, HEADri, HEADf/r, TAIL, ...

3. Select one of the calibration points

P1 … P5 and

activate the % value using the ENTER button, or by

pressing one of the 3D digi-adjustors. Now press

the digi-adjustor assign button <

Regardless of the position of the associated trans-

mitter control, or any control and mixer settings,

the servo now automatically adopts the position

corresponding to the percentage figure at the se-

lected calibration point. With one hand you can

now measure and check the control surface travel

easily and conveniently (ruler, venire calliper), while

the other hand remains free, so that you can alter

the value using the UP / DOWN buttons ( / ) or

one of the two 3D digi-adjustors.

Multiple servos (e.g. all

Aileron, all DELTA+, all

HEAD servos, ...) automatically adopt the same posi-

tion; these should run in the same direction as the

selected servo after you press the digi-adjustor as-

sign button <

>. If this is not the case, the direc-

tion of servo rotation must first be reversed using

REV. ( Î 16.1.1.).

When the travel is correct, press the digi-adjustor

assign button < F > once more. The servo now

takes up the position corresponding to the associ-

ated transmitter control.

Press the ENTER button or one of the 3D digi-

adjustors to conclude the set-up process for the se-

lected point.

The number of variable servo calibration points (min.

two, max. five points) varies according to the setting

you selected when you assigned the servo (Î 16.2.).

! Note:

The servo calibration facility should only be used for

fine-tuning the system. We strongly recommend that

you start by carefully adjusting the mechanical system.

You should never reduce the servo end-points

P1 and

P5 by more than about 10 … 20%, otherwise you forfeit

a proportion of the servo’s full power, servo accuracy is

reduced, and the effect of servo gearbox play is exag-

gerated. It is equally important that you should not

change the servo centre setting by more than about 10

… 20%, otherwise the servo will exhibit non-linear run-

ning characteristics in both directions.

 TIP: Vertical reference line

The dotted vertical line in the graph is simply a guide,

indicating the current position of the associated trans-

mitter control. If you have activated a value using the

digi-adjustor assign button < F >, the vertical line

jumps to the corresponding point and remains there

until you press the assign button again, or move the as-

sociated transmitter control.

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