Multiplex Royal Evo - 16.2.1. Special: MULTInaut IV; 16.2.2. Assigning servos for fixed wing models; 16.2.3. Assigning servos for helicopters

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ROYAL evo

Page 104

of the curve. The shape of the curve is unchanged. This

is the same as with the standard trim option.

Use servo trim TRM only to correct deviations in a

servo’s neutral position which you discover when set-

ting up the model. Don’t use it to trim a new model: the

mechanical linkage should always be adjusted as accu-

rately as possible.

16.1.2. Parameter „P1 … P5“

Adjusting the servo calibration points (parameters “P1 ...

P5”) can be useful in several ways. In detail these are:

• Defining the maximum working range of the servo

The servo travels never exceed the values (servo travels)

you set here.

(guards against the servo being stalled mechanically)

• Setting symmetrical control surface travels

• Adjusting the travels of several servos to match

each other.

This avoids the risk of mutual stalling, i.e. when two (or

more) servos are actuating the same control surface.

• Compensating for mechanical differences in the

control surface linkage

For example, if the flaps of a multi-flap wing do not mo-

ve through exactly the same deflections, the travels can

be matched to each other by adjusting the intermediate

points P2 and P4.

Careful calibration is important, especially in the case of

servos to which a mixer has been assigned.

! Note:

Servo calibration should only be used for fine adjust-

ment; it is not a remedy for an inaccurate mechanical

linkage. Always set up the mechanical system accurately

as the first step. On no account reduce the maximum

servo travels (P1 and P5) by more than about 10 - 20%,

otherwise you effectively reduce the maximum power

of the servo, and the effect of any lost motion in the

servo gearbox is amplified.

This is the procedure for calibrating a servo:

1. Servos, controlled by basic (non-mixed) functions

(Aileron, Elevator, Rudder, Undercarriage, ...):

First ensure that the direction of servo rotation

(control surface travel) is in the correct “sense”. If

necessary change the sense of rotation in the pa-

rameter REV/TRM (è 16.1.1.). If you subsequently

reverse the servo, you will need to repeat the

calibration procedure.

Servos, controlled by mixers

(AILERON+, DELTA, V-TAIL, ...):

If you have assigned a mixer to the servos the direc-

tion of servo rotation is not relevant. The correct di-

rection for the control surface travel is set in the mi-

xer itself.

2. Select the value of one of the points (P1 to P5). Now

press the digi-adjustor assignment button <

The servo automatically takes up the position of the

selected calibration point and remains there. With

one hand you can now easily and conveniently

measure and check the travel (ruler, calliper); the

other hand remains free, and can be used to adjust

the value using the UP/DOWN buttons s / t or

one of the two 3-D digi-adjustors.

If the deflection is correct, press the digi-adjustor

assignment button < F > again. The servo moves

to the position given by the current position of the

corresponding control.

The number of variable servo calibration points (min. 2,

max. 5) varies according to the setting you selected

under Servo Assignment (è 16.2).

' TIP: Vertical dotted line for orientation

The vertical dotted line always shows the current servo

position, to help you understand “where you are”. Press-

ing the digi-adjustor assignment button < F >(*), or

moving the transmitter control associated with the

servo or servos, releases the servo again at the selected

calibration point. The servo takes up the position corre-

sponding to the position of the associated transmitter

control(s).

16.2. Sub-Menu „Assignment“

I affects the active model memory

free assignment of servos

assignments in the model templates for MULTI-

PLEX or other standards

all 9 (or 12) servos are shown in the list

As with the MULTIPLEX PROFI mc 3000 and 4000 series

of radio control systems, the ROYALevo offers the facility

to define the sequence, or order, of the receiver outputs

- with no restrictions. Compared to radio control sys-

tems with a fixed receiver output sequence this pro-

vides the advantage that, for example, the signal for a

second aileron servo (usually generated on the “high”

channels, e.g. channel 5) can be assigned to any chan-

nel you wish. This makes it possible to use two aileron

servos even with a small 4-channel receiver.

Col. 1 Col. 2 Col. 3 Col. 4

Servo-No. Control Pulse Number of

or Mixer format points

Details see tabele on the right-hand side.

This is the assignment procedure:

1. Select a servo,