Operation Manual

8.3. Adjusting servos (direction of rotation, pulse format, centre and travels)

The model’s receiving system must be switched on when you make these adjust-

ments. When you do this the control surfaces and other controlled functions will

move to pre-defined settings.

Caution with electric-powered models. The motor could burst into life!

If you have a fixed-wing model aircraft with two aileron servos, you should first set

the DIFF mixer to 1% (see 8.5.1.).

8.3.1. Selecting the direction of rotation and servo signal format

The COCKPIT

allows you to set the servos’ direction of rotation and signal format

for all seven channels individually.

The direction of rotation must be reversed if a movement of the transmitter stick

causes the associated servo to move in the wrong direction. Movements of the

transmitter controls must have the following effect on the servos (i.e. control sur-

faces) in the model:

Direction of rotation and pulse format for the servos are set together in one single

menu. Possible options are:

Option Signal Direction of rotation

UNUN

UNI format (1.5 ms) Normal (default setting)

URUR

UNI format (1.5 ms) Reverse

MNMN

MULTIPLEX format (1.6 ms) Normal

MRMR

MULTIPLEX format (1.6 ms) Reverse

Note: All MULTIPLEX servos fitted with standard MPX connectors employ the

MULTIPLEX signal format. If the signal format does not match the servo, the centre

position and end-points of the transmitter and servo will not coincide.

Note:

It is not good practice to reset the servo centre or end-points from their default

settings by more than a small amount. It is always better to adjust the mechanical

system first. This is done by adjusting the pushrod length, changing the length of

the servo output arm or horn, altering the position of the servo output arm on the

output shaft as accurately as possible. Optimising the mechanical arrangement in

this way reduces linearity errors and minimises control surface slop, and the power

of the servo can be exploited to the full.

Control AILERON: to the right Contr. RUDDER: to the right

Contr. ELEVATOR: up (pull)